About Circa Telecom Inc.
C
irca Telecom was founded in 1985 to
provide quality protection products to the
telecommunication industry. Circa’s headquarters
are in Calgary, Alberta, Canada, along with fully
integrated manufacturing, service and distribution
facilities. Through its wholly owned subsidiary, Circa
Telecom USA Inc., Circa provides sales and service
support to the U.S. marketplace. In 1988, Circa became a public company, and today is listed on the
Toronto Stock Exchange.
How Can Circa Help You?
The underlying principal behind protection is simple:
install a suitable protector unit on every exposed line
leading into your telecommunications and networking equipment. Qualified protection specialists at
Circa can help you select the right protection
solution for your network from a wide range of high
have been developed to provide the best possible
protection for different types of equipment.
Circa also provides a wide selection of protection
panels which are used to house multiple protectors.
Panel and terminals for 6, 12, 25, 50, 100 pairs and
beyond are available with an impressive array of
customer connection and termination options.
Circa can also help you with unusual or unique requirements. Our staff of product support specialists
can help your company with specific protection and
housing needs not readily available off the shelf
elsewhere.
Circa’s mandate is to “provide high quality, innovative protection products to the telecommunication
industry at affordable prices.”
quality products. Different types of protector units
NEW
CAT
ALO
G
COM
ING
SOO
N
For sales and/or technical assistance,
please contact us at:
CANADA
Telephone: 1-877-257-4588
Fax: (403) 255-2595
Internet Home Page: www.circatel.com
E-mail: circasales@circaent.com
U.S.A.
Telephone: 1-800-783-6556
Fax: (727) 863-8876
Internet Home Page: www.circatel.com
E-mail: circasales@circaent.com
TOC
Table of Contents
About Circa Enterprises Inc. .............................................................................................................................. 1
Table of Contents ............................................................................................................................................... 2
CommScope/AVAYA Cross Reference Guide .................................................................................................... 4
Competitors Cross Reference Guide ................................................................................................................. 6
Order Guide ....................................................................................................................................................... 8
Cable Ordering Guide ........................................................................................................................................ 8
110 Connection (1880 Series)
ISP-110G, ISP-110S ........................................................................................................................................... 9
1880ENA1/NSC-6 ............................................................................................................................................ 11
1880ENA1/NSC-25 .......................................................................................................................................... 13
1880ENA1/NSC-50 .......................................................................................................................................... 15
1880ENA1/NSC-100 ........................................................................................................................................ 17
1880ENA1/NSC-200 ........................................................................................................................................ 19
1880ECA1-25 ................................................................................................................................................... 21
1880ECA1-50 ................................................................................................................................................... 23
1880ECA1-100 ................................................................................................................................................. 25
1880B1-25 ........................................................................................................................................................ 27
1880B1-50 ........................................................................................................................................................ 29
1880B1-100 ...................................................................................................................................................... 31
1880ENS1-25 ................................................................................................................................................... 85
1880ENS1-50 ................................................................................................................................................... 87
1880ECS1-100 ................................................................................................................................................. 89
1880ENM1-25 .................................................................................................................................................. 97
1880ENM1-50 .................................................................................................................................................. 99
1880ECM1-100 .............................................................................................................................................. 101
66 Block/Quick Clip Connection (2600 & 1890 Series)
ISP-66G, ISP-66S .............................................................................................................................................. 9
2606QC/QC prev 600QC2 ............................................................................................................................... 33
2612QC/QC prev 2412QC2 ............................................................................................................................. 35
2625QC/QC prev 2600QC2 ............................................................................................................................. 37
1890ECT1/NSC-25 .......................................................................................................................................... 39
1890ECT1/NSC-50 .......................................................................................................................................... 41
1890ECT1/NSC-100 ........................................................................................................................................ 43
1890ECT1-25 ................................................................................................................................................... 45
1890ECT1-50 ................................................................................................................................................... 47
1890ECT1-100 ................................................................................................................................................. 49
1890BC1-25 ..................................................................................................................................................... 51
1890BC1-50 ..................................................................................................................................................... 53
1890BC1-100 ................................................................................................................................................... 55
1890ECS1-25 ................................................................................................................................................... 91
1890ECS1-50 ................................................................................................................................................... 93
1890ECS1-100 ................................................................................................................................................. 95
1890ECM1-25 ................................................................................................................................................ 103
1890ECM1-50 ................................................................................................................................................ 105
1890ECM1-100 .............................................................................................................................................. 107
Cable Stub Connection (2000 & 1900 Series)
1900-50 ............................................................................................................................................................ 57
1900-100 .......................................................................................................................................................... 59
1900A1-100 ...................................................................................................................................................... 61
2
Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
TOC
Table of Contents
Bix Connection (2100 Series)
2100B-6 ............................................................................................................................................................ 63
2100BN-10 ....................................................................................................................................................... 65
2100B-12 .......................................................................................................................................................... 67
2100B-25 .......................................................................................................................................................... 69
2100B-100 ........................................................................................................................................................ 71
2100SB-25 ....................................................................................................................................................... 73
2100SB-50 ....................................................................................................................................................... 75
2100SB-100 ..................................................................................................................................................... 77
2100SBC-25 ..................................................................................................................................................... 79
2100SBC-50 ..................................................................................................................................................... 81
2100SBC-100 ................................................................................................................................................... 83
710 Strip Connection
1880ENS1-25 ................................................................................................................................................... 85
1880ENS1-50 ................................................................................................................................................... 87
1880ECS1-100 ................................................................................................................................................. 89
1890ECS1-25 ................................................................................................................................................... 91
1890ECS1-50 ................................................................................................................................................... 93
1890ECS1-100 ................................................................................................................................................. 95
MS2 Strip Connection
1880ENM1-25 .................................................................................................................................................. 97
1880ENM1-50 .................................................................................................................................................. 99
1880ECM1-100 .............................................................................................................................................. 101
1890ECM1-25 ................................................................................................................................................ 103
1890ECM1-50 ................................................................................................................................................ 105
1890ECM1-100 .............................................................................................................................................. 107
5 Pin Protection Modules
3B1S-300, 3B1FS-240, 4B1S-300 & 4B1FS-240 Series ............................................................................... 109
3B1E & 4B1E Series ...................................................................................................................................... 111
Digital Low Voltage Series ............................................................................................................................. 113
Station Protectors / Outdoor Protectors
1356 Series .................................................................................................................................................... 115
1360 & 1360B Series ..................................................................................................................................... 117
1357 Series .................................................................................................................................................... 119
CT512 & CT525 Series .................................................................................................................................. 121
3000P Series .................................................................................................................................................. 123
NEMA 4X Series ............................................................................................................................................ 125
Central Office Connectors (4486 & 3355 Series)
4486 Series .................................................................................................................................................... 127
3355 Series .................................................................................................................................................... 129
High Density / Rack Mount
1880ENA1/NSC-200 ........................................................................................................................................ 19
RMP300XLBET .............................................................................................................................................. 131
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice
3
Cross Ref.
CommScope/AVAYA Cross Reference Guide
This guide has been added to our catalogue as a reference tool for you, our customer. The guide is to be
utilized as a resource only and we strongly recommend you turn to the specific product page for exact specifications. The guide below and on the following pages is referenced mainly on an operational basis.
Circa
A.T. & T.
A.T.& T. Comcode
Commscope
Equivalent
Commscope
Comcode
1880ECA1/NSC-6
110ANA1-06
105 736 482
110ANA-6
1880B1-25
188B1-25
106 087 133
489ACC1-025
107 894 941
1880B1-50
188B1-50
103 314 969
489ACC1-050
107 894 958
1880B1-100
188B1-100
103 314 951
489ACC1-100
107 894 966
1880ECA1-25
188ECA1-25G
106 087 190
489ACA1-025
107 894 909
1880ECA1-50
188ECA1-50G
106 086 804
489ACA1-050
107 894 917
1880ECA1-100
188ECA1-100G
106 086 795
489ACA1-100
107 894 925
1880ENM1-25
188ENP1-25G
106 087 166
1880ENM1-50
188ENP1-50G
106 087 174
1880ECM1-100
188ECP1-100G
106 087 158
489ACM1-100
107 894 990
1880ENS1-25
188ENS1-25G
106 086 911
1880ENS1-50
188ENS1-50G
106 086 929
1880ECS1-100
188ECS1-100G
106 086 903
489ACS1-100
107 895 070
1880ENA1/NSC-25
110ANA1-25G
105 736 490
489ACC1-025
1880ENA1/NSC-50
188ENA1-50G
106 086 770
489BCC1-050
1880ENA1/NSC-100
188ENA1-100G
106 086 762
489ACC1-100
1890BC1-25
189BC1-25
103 623 633
489BCC1-025
107 895 138
1890BC1-50
189BC1-50
103 623 641
489BCC1-050
107 895 146
1890BC1-100
189BC1-100
103 623 658
489BCC1-100
107 895 159
1890ECM1-25
189ECM1-25
105 553 317
489BCM1-25
107 895 161
1890ECM1-50
189ECM1-50
105 553 325
489BCM1-50
107 895 179
1890ECM1-100
1890ECM1-100
105 553 333
489BCM1-100
107 895 187
1890ECS1-25
189ECS1-25
104 305 107
489BCS1-25
107 895 203
1880ENA1/NSC-200
4
Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Cross Ref.
CommScope/AVAYA Cross Reference Guide
Circa
A.T. & T.
A.T.& T. Comcode
Commscope
Equivalent
Commscope
Comcode
1890ECS1-50
189ECS1-50
104 305 123
489BCS1-50
107 895 211
1890ECS1-100
189ECS1-100
104 305 115
489BCS1-100
107 895 229
1890ECT1-25
189ECT1-25
104 305 131
489BCB1-025
107 895 096
1890ECT1-50
189ECT1-50
104 305 156
489BCB1-050
107 895 104
1890ECT1-100
189ECT1-100
104 305 149
489BCB1-100
107 895 112
1890ECT1/NSC-25
489ACA1-025
1890ECT1/NSC-50
1890ECT1/NSC-100
2606QC/QC
2612QC/QC
2625QC/QC
2650QC/QC
26100QC/QC
1900A1-100
190A1-100-25
3B1S-300
3B1S
3B1FS-240
3B1FS
3B1E
3B1E
104 410 147
3B1E
4B1E
4B1E
104 401 856
4B1E
4B1S-300
4B1S
1356 Station Protector
125EW
102 995 099
1360 Station Protector
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice
5
Cross Ref.
Competitors Cross Reference Guide
This guide has been added to our catalogue as a reference tool for you, our customer. The guide is to be
utilized as a resource only and we strongly recommend you turn to the specific product page for exact specifications. The guide below and on the following pages is referenced mainly on an operational basis.
Circa
Emerson
(Reltec)
1880ECA1/NSC-6
Porta
(1 pin)
Porta
(5 pin)
Corning
(Siecor)
150PX26
1880B1-25
1880B1-50
BEPT25SC25
BEPT50SC25
25025 ST-M110
25050 ST-M110
S110-02T4D25
S110-00T4D25
1880B1-100
1880ECA1-25
BEPT100SC25
BEPT25T
25100 ST-M110
S110-01T4D25
24025-110-F110C
1880ECA1-50
1880ECA1-100
BEPT50T
BEPT100T
24050-110-F110C
24100-110-F110C
1880ENM1-25
1880ENM1-50
BEPT25MM
BEPT50MM
1880ECM1-100
1880ENS1-25
BEPT100MM
BEPT25CF
1880ENS1-50
1880ECS1-100
BEPT50CF
BEPT100F
1880ENA1/NSC-25
1880ENA1/NSC-50
25025-110-M110
25050-110-M110
1880ENA1/NSC-100
25100-110-M110
1890BC1-25
1890BC1-50
BEPC25SC25
BEPC50SC25
25025 ST-M66
25050 ST-M66
552525U24A1
55052U24A1
1890BC1-100
1890ECM1-25
BEPC100SC25
BEPC25MM
25100 ST-M66
551525U24A1
1890ECM1-50
1890ECM1-100
BEPC50MM
BEPC100MM
1890ECS1-25
1890ECS1-50
BEPC25CF
BEPC50CF
1890ECS1-100
1890ECT1-25
BEPC100CF
BEPC25C
24025-66-F66C
24025-66-M66C
1890ECT1-50
1890ECT1-100
BEPC50C
BEPC100C
24050-66-F66C
24100-66-F66C
24050-66-M66C
24100-66-M66C
1890ECT1/NSC-25
1890ECT1/NSC-50
25025-66-M66C
25050-66-M66C
1890ECT1/NSC-100
25100 66-M66C
6
Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Cross Ref.
Competitors Cross Reference Guide
Circa
Emerson
(Reltec)
Porta
(1 pin)
2606QC/QC
BEPN10N0
504PX26
2612QC/QC
2625QC/QC
3636VSR2
R66P25QC
504PX210
581P225
Porta
(5 pin)
Corning
(Siecor)
505PX210
2650QC/QC
26100QC/QC
1900A1-100
R13410025
26100-ST-MST
1900-100
1900-50
26050-ST-MST
1900-25
2100B-25
2100SB-25
BEPN25NL0
BEPN25NL0
2100SBC-25
2105-25
BEPA4525NL0
BEPN2545LF0
2100SB-100
2100B-100
BEPAN100N0
BEPAN100N0
2100SBC-100
2100SBC-50
BEPA45100N0
BEPAN50NL0
2100BN-10
BEPA4550NL0
4486 Series
3355 Series
486
R355
3B1S (unbalanced)
R3B1S
3B1S-300
3B1FS-240
R3B1FS
15SCNHDSL
15SCNHDSL-230
115SCNHDSL
6SSE-BG
3B1E
4B1E
R3B1E, R3C1E
R4B1E, R4C1E
75BCXN
95BCXN
175BCXN
195BCXN
3B1E
4B1S-300
4B1FS-240
R4B1S
15SCN
115SCN
C-4C1ES
C-4C1FS
05SCN-75
105SCN-75
4B3S-75
1356 Station Protector
1360 Station Protector
R356VSR2
R356T
1357 Enclosure
394EW
RMPXL300BET
PROT300XLBET
Issued Spring 2007,  Circa Enterprises Inc.
C-3C1ES
SPD356
CT5200N24
Tel: 1-800-783-6556
Specifications subject to change without notice
7
Order Guide
Cable Ordering Guide
Designations for the available cable types:
“A”
“B”
24 AWG shielded
24 AWG unshielded
“C”
“D”
26 AWG shielded
26 AWG unshielded
“E”
“F”
22 AWG shielded
22 AWG shielded, grease filled
“G”
19 AWG shielded, grease filled
Ordering instructions:
1.
2.
3.
apply the first six digits of the “order number”
incoming cable (if applicable) - apply above “letter designation” for proper cable gauge
incoming cable (if applicable) - numerically mark cable length
4.
5.
outgoing cable (if applicable) - apply above “letter designation” for proper cable gauge
outgoing cable (if applicable) - numerically mark cable length
example: Circa model 1900A1-100, complete order number would be 416016C25A25
1.
2-3.
416016
416016C25
(first six digits of order number)
(26 AWG shielded incoming cable, 25 feet)
4-5.
416016C25A25
(24 AWG shielded outgoing cable, 25 feet)
Acceptable wire gauges for terminating connector blocks as follows:
bix connector
22-26 AWG
8
66 block
66 block
20-26 AWG (with insulation)
18-19 AWG (without insulation)
710 connector
MS2 connector
22-26 AWG
22-28 AWG
110 block
22-26 AWG
Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Integrated Six Pair Protector
Premium Quality - Heavy Duty
Features & Benefits
• Modern circuit board design
• Heavy duty gas tube or fast-acting
solid state device
• Available in 66 Block or 110
connection styles
• Lightweight
• Aesthetically pleasing compact
design
• Built-in printed circuit board fuse link
• Tamper resistant screw-down cover
• Meets UL497 requirements for primary protectors
Applications
• Temporary outside plant cable installations using small pair counts in trailers or portables
• Small PBX system protection
• Residential retrofit or new installation
Integrated Six Pair Protector
Ordering Information
Model No.
Order No.
Protection
Type
Connection
Dimension
Style
(H" x W" x D")
Weight
(lbs)
ISP-66G
105001
Gas
66 Block
4.71 x 7.27 x 2.26
1.5
ISP-66S
105003
Solid State
66 Block
4.71 x 7.27 x 2.26
1.5
ISP-110G
105005
Gas
110
4.71 x 7.27 x 2.26
1.5
ISP-110S
105007
Solid State
110
4.71 x 7.27 x 2.26
1.5
Issued Spirng 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice
9
NEW
Building Entrance Terminals (Indoor)
NEW
Building Entrance Terminals (Indoor)
Integrated Six Pair Protector
10 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ENA1/NSC-6
Premium Quality - Heavy Duty
110
Features & Benefits
• 110 connector input and output
• protects up to 6 lines, also available in 25 pair
(1880ENA1/NSC-25), 50 pair (1880ENA1/NSC50) and 100 pair (1880ENA1/NSC-100)
configuration
• ideal for small PBX and interconnect installations
• stackable to allow for future service expansion
• external ground post for extending metallic frame to
building ground
• equipped with an internal fuse link
• accommodates industry standard 5 pin protection
modules
• designed to exceed the requirements set forth in
Underwriters Laboratories UL497
1880ENA1/NSC-6
1880ENA1/NSC-6
Ordering Information
Model No.
Order No.
Pair
Input
Count
1880ENA1/NSC-6 600-110-2US 6
110 connector
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
5.25 x 3.0 x 1.75
0.6
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 11
Building Entrance Terminals (Indoor)
110
1880ECA1/NSC-6
12 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ENA1/NSC-25
Premium Quality - Heavy Duty
110
Features & Benefits
• 110 connector input and output
• protects up to 25 lines, also
available in 6 pair (1880ENA1/NSC-6),
50 pair (1880ENA1/NSC-50) and 100 pair
(1880ENA1/NSC-100) configuration
• wall or frame mountable
• stackable to allow for future service
expansion
• external ground connector accepts
6-14 AWG ground wire
1880ENA1/NSC-25
PREVIOUSLY
1880ANA-25
• equipped with an internal fuse link
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880ENA1/NSC-25
Ordering Information
Model No.
1880ENA1/NSC-25
Order No. Pair
Count
Input
308001
110 connector 110 connector
25
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
5.38 x 8.5 x 2.78
6
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 13
Building Entrance Terminals (Indoor)
110
1880ENA1/NSC-25
CIRCA 1880ENA1/NSC-25G
5
1
0
1
5
5.38"
2
0
2
5
5
10
IN
OUT
15
20
25
2.78"
1
8.50"
14 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ENA1/NSC-50
Premium Quality - Heavy Duty
110
Features & Benefits
• 110 connector input and output
• protects up to 50 lines, also available in
6 pair (1880ENA1-6), 25 pair (1880ENA1/
NSC-25) and 100 pair (1880ENA1/
NSC-100) configuration
• built-in stand off bracket allows for easy
distribution cable routing
• wall or frame mountable
• stackable to allow for future service
expansion
1880ENA1/NSC-50
PREVIOUSLY 1880110-50
• external ground connector accepts
6-14 AWG ground wire
• equipped with an internal fuse link
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880ENA1/NSC-50
Ordering Information
Model No.
1880ENA1/NSC-50
Order No. Pair
Count
Input
315015
110 connector 110 connector
50
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
7.18 x 10.75 x 5.45
9
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 15
Building Entrance Terminals (Indoor)
110
1880ENA1/NSC-50
CIRCA 1880ENA1/NSC-50G
10
20
30
40
7.18
50
5
10
26
30
35
1
5
10
26
30
35
IN
OUT
15
20
25
40
45
50
15
20
25
40
45
50
5.45
1
10.75
16 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ENA1/NSC-100
Premium Quality - Heavy Duty
110
Features & Benefits
• 110 connector input and output
• protects up to 100 lines, also available in 6 pair
(1880ENA1/NSC-6), 25 pair (1880ENA1/NSC25) and 50 pair (1880ENA1/NSC-50)
configuration
• built-in stand off bracket allows for easy
distribution cable routing
• wall or frame mountable
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG
ground wire
• equipped with an internal fuse link
• accommodates industry standard 5 pin
protection module
1880ENA1/NSC-100
• designed to exceed the requirements set forth
in Underwriters Laboratory’s UL497
(cover not shown)
PREVIOUSLY 1880110-100
1880ENA1/NSC-100
Ordering Information
Model No.
Order No. Pair
Count
Input
1880ENA1/NSC-100
328028
100
1880ENA1/NSC-100
327027
100
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
110 connector 110 connector
14.15 x 10.75 x 5.45
12
110 connector 110 connector
14.15 x 10.75 x 6
13
(with cover)
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 17
Building Entrance Terminals (Indoor)
1880ENA1/NSC-100
110
10.750
CIRCA 1880ENA1/NSC-100
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
9
0
1
5
10
15
20
25
26
30
35
40
45
50
14.150
10
0
INCOMING
51
55
60
65
70
75
76
80
85
90
95
100
1
5
10
15
20
25
26
30
35
40
45
50
OUTGOING
55
60
65
70
75
76
80
85
90
95
100
5.450
51
18 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ENA1/NSC-200
Universal 200 Pair Protector
Premium Quality - Heavy Duty
110
Features & Benefits
• high density, space saving design - only 14 inches tall
• 19 inch rackmount or wall mounting
• protects up to 200 pairs
• can be mounted 6 units high and utilize both sides of a rack
allowing for up to 2400 pairs of protection on a standard or
universal 8 foot tall, 19 inch EIA rack. (2000 pairs on a 7 foot tall,
19 inch rack)
1880ENA1/NSC-200
• accommodates industry standard 5 pin protector module
• stackable to allow for future expansion
• equipped with an internal fuse link
• includes necessary hardware for rack or wall mounting
• external two position ground lug accepts 6-14 AWG ground wire
• designed to exceed the requirements set forth in Underwriters
Laboratories UL497
1880ECA1/NSC-200*
1880ENA1/NSC-200
Ordering Information
Model No.
1880ENA1/NSC-200
Order No. Pair
Count
Input
Output
Dimensions
(H" x W" x D")
Weight
(lbs)
331901
200
110 connector
110 connector
14.0 x 20.0 x 5.0
21
1880ENA1/NSC-200R/C 331902
200
110 connector
110 connector
14.0 x 20.0 x 5.0
21
1880ECA1/NSC-200*
331903
200
110 connector
110 connector
14.0 x 20.0 x 11.5
26
1880ECA1/NSC-200R/C * 331904
200
110 connector
110 connector
14.0 x 20.0 x 11.5
26
Note: Protection modules ordered separately
R/C refers to reversed configuration for use on other side of rack
* includes full cover
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 19
Building Entrance Terminals (Indoor)
110
1880ENA1/NSC-200
20 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ECA1-25
Premium Quality - Heavy Duty
110
Features & Benefits
• 110 connector input and output
• protects up to 25 lines, also
available in 50 pair (1880ECA150) and 100 pair (1880ECA1100) configuration
• wall or frame mountable
• designed with an internal splice
chamber and cover over
incoming and outgoing
connections and protection modules
1880ECA1-25
• equipped with an internal fuse link
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG ground wire
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880ECA1-25
Ordering Information
Model No.
1880ECA1-25
Order No.
304004
Pair
Count
Input
25
110 connector
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
9.2 x 15.25 x 4.75
14
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 21
Building Entrance Terminals (Indoor)
110
1880ECA1-25
22 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ECA1-50
Premium Quality - Heavy Duty
110
Features & Benefits
• 110 connector input and output
• protects up to 50 lines, also
available in 25 pair (1880ECA125) and 100 pair (1880ECA1100) configuration
• wall or frame mountable
• designed with an internal splice
chamber and cover over
incoming and outgoing
connections and protection modules
1880ECA1-50
• stackable to allow for future service expansion
• equipped with an internal fuse link
• external ground connectors accept 6-14 AWG ground wire
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880ECA1-50
Ordering Information
Model No.
1880ECA1-50
Order No.
316016
Pair
Count
Input
50
110 connector
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
9.2 x 15.25 x 4.75
15
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 23
Building Entrance Terminals (Indoor)
110
1880ECA1-50
15.25"
4.75"
9.20"
50
50
25
25
20
45
45
20
40
40
15
15
10
35
35
10
30
30
5
5
26
26
1
1
24 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ECA1-100
Premium Quality - Heavy Duty
110
Features & Benefits
• 110 connector input and output
• protects up to 100 lines, also
available in 25 pair (1880ECA125) and 50 pair (1880ECA1-50)
configuration
• wall or frame mountable
• designed with an internal splice
chamber and cover over incoming
and outgoing connections and
protection modules
• stackable to allow for future
service expansion
• external three position ground
connectors accept 6-14 AWG
ground wire
1880ECA1-100
PREVIOUSLY 1880ENA110-100
• equipped with an internal fuse link
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880ECA1-100
Ordering Information
Model No.
1880ECA1-100
Order No.
329029
Pair
Count
Input
100
110 connector
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
10.75 x 14.5 x 6.25
15
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 25
Building Entrance Terminals (Indoor)
110
1880ECA1-100
26 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880B1-25
Premium Quality - Heavy Duty
110
Features & Benefits
• 25 foot cable stub input and 110 connector output
• protects up to 25 lines, also available in 50 pair
(1880B1-50) and 100 pair (1880B1-100)
configuration
• built-in stand off bracket allows for easy
distribution cable routing
• 26 AWG swivel stub serves as fuselink
• stackable to allow for future service expansion
1880B1-25
• external ground connectors accept 6-14 AWG
ground wire
PREVIOUSLY
1880C110-25
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880B1-25
Ordering Information
Model No.
1880B1-25
Order No.
301002C25
Pair
Count
25
Input
25 ft. 26 AWG
shielded cable
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
5.38 x 10.75 x 4.75
9
Note: Alternate cable lengths and gauges are available upon request.
Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 27
Building Entrance Terminals (Indoor)
110
1880B1-25
10.750"
CIRCA 1880B1-25
5
10
15
20
25
5.380"
1
5
10
15
20
25
4.750"
28 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880B1-50
Premium Quality - Heavy Duty
110
Features & Benefits
• 25 foot cable stub input and 110 connector output
• protects up to 50 lines, also available in 25 pair
(1880B1-25) and 100 pair (1880B1-100)
configuration
• built-in stand off bracket allows for easy
distribution cable routing
• 26 AWG swivel stub serves as fuselink
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG
ground wire
1880B1-50
PREVIOUSLY
• accommodates industry standard 5 pin protection
modules
1880C110-50
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880B1-50
Ordering Information
Model No.
1880B1-50
Order No.
313014C25
Pair
Count
50
Input
25 ft. 26 AWG
shielded cable
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
5.38 x 10.75 x 4.75
10
Note: Alternate cable lengths and gauges are available upon request.
Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 29
Building Entrance Terminals (Indoor)
110
1880B1-50
10.750"
CIRCA 1880B1-50
10
20
30
40
50
1
5
10
15
20
25
26
30
35
40
45
50
5.380"
4.750"
30 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880B1-100
Premium Quality - Heavy Duty
110
Features & Benefits
• 25 foot cable stub input and 110 connector
output
• protects up to 100 lines, also available in 25
pair (1880B1-25) and 50 pair (1880B1-50)
configuration
• built-in stand off bracket allows for easy
distribution cable routing
• 26 AWG swivel stub serves as fuselink
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG
ground wire
1880B1-100
PREVIOUSLY
1880C110-100
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880B1-100
Ordering Information
Model No.
1880B1-100
Order No.
326027C25
Pair
Count
100
Input
25 ft. 26 AWG
shielded cable
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
10.75 x 10.75 x 4.75
15
Note: Alternate cable lengths and gauges are available upon request.
Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 31
Building Entrance Terminals (Indoor)
1880B1-100
110
10.75"
10
20
30
40
50
60
70
10.75"
80
90
100
5
10
15
20
25
26
30
35
40
45
50
51
76
55
80
60
85
65
90
70
95
75
100
4.75"
1
32 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
Premium Quality - Heavy Duty
2606QC/QC PREV 600QC2
Features & Benefits
66
• IDC style 66 block input and output
• protects up to 6 lines, also available
in 10 pair (2610QC/QC), 12 pair
(2612QC/QC), 25 pair (2625QC/QC),
50 pair (2650QC/QC), and 100 pair
(26100QC/QC) configuration
• ideal for small PBX installations
• stackable to accommodate future
expansion
• external ground connectors accept
6-14 AWG ground wire
• equipped with an internal fuse link
2606QC/QC
• accommodates industry standard
5 pin protection modules
• designed to exceed the requirements set
forth in Underwriters Laboratory’s UL497
2606QC/QC
Ordering Information
Model No.
2606QC/QC
Order No.
101001
Pair
Count
6
Input
66 block
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
4.5 x 4.0 x 2.7
1.5
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 33
Building Entrance Terminals (Indoor)
66
2606QC/QC
34 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2612QC/QC PREV 2412QC2
Premium Quality - Heavy Duty
Features & Benefits
66
• IDC style 66 block input and output
• protects up to 12 lines, also available in 6 pair
(2606QC/QC) 25 pair (2625QC/QC), 50 pair (2650QC/QC),
and 100 pair (26100QC/QC) configuration
• ideal for small PBX installations
• equipped with an internal fuse link
• stackable to accommodate future expansion
• external ground connectors accept 6-14 AWG ground wire
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters
Laboratory’s UL497
2612QC/QC
2612QC/QC
Ordering Information
Model No.
2612QC/QC
Order No.
104003
Pair
Count
12
Input
66 block
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
9.84 x 4.5 x 2.7
2.5
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 35
Building Entrance Terminals (Indoor)
66
2612QC/QC
36 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2625QC/QC PREV 2600QC2
Premium Quality - Heavy Duty
Features & Benefits
66
• IDC style 66 block input and output
• accepts industry standard 89 type bracket to
facilitate cable routing
• protects up to 25 lines, also available in
6 pair (2606QC/QC), 12 pair (2612QC/QC),
50 pair (2650QC/QC) and 100 pair
(26100QC/QC) configuration
• ideal for small PBX installations
• equipped with an internal fuse link
2625QC/QC
• stackable to accommodate future expansion
• external ground connectors accept 6-14 AWG ground wire
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
2625QC/QC
Ordering Information
Model No.
2625QC/QC
Order No.
114012
Pair
Count
25
Input
66 block
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
10.1 x 3.5 x 3.05
3
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 37
Building Entrance Terminals (Indoor)
66
2625QC/QC
38 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890ECT1/NSC-25
Premium Quality - Heavy Duty
Features & Benefits
66
• 66 block input and output
• protects up to 25 lines, also available in 50 pair
(1890ECT1/NSC-50) and 100 pair (1890ECT1/
NSC-100) configuration
• dust cover provided for protector modules
and cross connect blocks
• lightweight, compact design
• internal fuse link provided
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG
ground wire
• accommodates industry standard 5 pin
protection module
1890ECT1/NSC-25
• designed to exceed the requirements set forth
in Underwriters Laboratory’s UL497
PREVIOUSLY
2525QC2-25
1890ECT1/NSC-25
Ordering Information
Model No.
Order No. Pair
Count
1890ECT1/NSC-25 111009
25
Input
66 block
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
8 x 9 x 4.25
5
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 39
Building Entrance Terminals (Indoor)
66
1890ECT1/NSC-25
40 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890ECT1/NSC-50
Premium Quality - Heavy Duty
Features & Benefits
• 66 block input and output
66
• protects up to 50 lines, also available in 25 pair
(1890ECT1/NSC-25) and 100 pair (1890ECT1/NSC100) configuration
• dust cover provided for protector modules and cross
connect blocks
• lightweight, compact design
• internal fuse link provided
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG
ground wire
• accommodates industry standard 5 pin protection
module
• designed to exceed the requirements set forth in
Underwriters Laboratory’s UL497
1890ECT1/NSC-50
PREVIOUSLY
2550QC2-50
1890ECT1/NSC-50
Ordering Information
Model No.
Order No. Pair
Count
1890ECT1/NSC-50 127025
50
Input
66 block
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
9.75 x 11.5 x 4.5
8.5
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 41
Building Entrance Terminals (Indoor)
66
1890ECT1/NSC-50
42 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890ECT1/NSC-100
Premium Quality - Heavy Duty
Features & Benefits
• 66 block input and output
66
• protects up to 100 lines, also available in 25
pair (1890ECT1/NSC-25) and 50 pair
(1890ECT1/NSC-50) configuration
• dust cover provided for protector modules and
cross connect blocks
• lightweight, compact design
• internal fuse link provided
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG
ground wire
• accommodates industry standard 5 pin
protection module
• designed to exceed the requirements set forth in
Underwriters Laboratory’s UL497
1890ECT1/NSC-100
PREVIOUSLY
2500QC2-100
1890ECT1/NSC-100
Ordering Information
Model No.
Order No. Pair
Count
1890ECT1/NSC-100 137034
100
Input
66 block
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
11.0 x 15.0 x 4.5
14
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 43
Building Entrance Terminals (Indoor)
66
1890ECT1/NSC-100
44 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890ECT1-25
Premium Quality - Heavy Duty
Features & Benefits
66
• 66 block input and output
• protects up to 25 lines, also available in
50 pair (1890ECT1-50) and 100 pair
(1890ECT1-100) configuration
• double door locking lid system for
restricted or separate access
• equipped with an internal fuse link
• also equipped with a removable splice
chamber should the terminal fuse within
a multiple configuration
1890ECT1-25
PREVIOUSLY
2225QC2-25
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG ground wire
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1890ECT1-25
Ordering Information
Model No.
1890ECT1-25
Order No.
107005
Pair
Count
Input
25
66 block
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
9.5 x 16.5 x 5
8
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 45
Building Entrance Terminals (Indoor)
66
1890ECT1-25
46 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890ECT1-50
Premium Quality - Heavy Duty
Features & Benefits
• 66 block input and output
66
• protects up to 50 lines, also available
in 25 pair (1890ECT1-25) and 100 pair
(1890ECT1-100) configuration
• double door locking lid system
for restricted or separate access
• equipped with an internal fuse link
1890ECT1-50
• also equipped with a removable
splice chamber should the terminal
fuse within a multiple configuration
PREVIOUSLY
2250QC2-50
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG ground wire
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1890ECT1-50
Ordering Information
Model No.
1890ECT1-50
Order No.
123021
Pair
Count
Input
50
66 block
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
9.2 x 15.25 x 4.75
15
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 47
Building Entrance Terminals (Indoor)
66
1890ECT1-50
48 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890ECT1-100
Premium Quality - Heavy Duty
Features & Benefits
• 66 block input and output
66
• protects up to 100 lines, also
available in 25 pair (1890ECT1-25)
and 50 pair (1890ECT1-50)
configuration
• double door locking lid system
for restricted or separate access
• equipped with an internal fuse link
1890ECT1-100
PREVIOUSLY
2200QC2-100
• also equipped with a removable
splice chamber should the terminal fuse within a multiple configuration
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG ground wire
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1890ECT1-100
Ordering Information
Model No.
1890ECT1-100
Order No.
133030
Pair
Count
Input
100
66 block
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
11.75 x 19.0 x 4.7
27
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 49
Building Entrance Terminals (Indoor)
66
1890ECT1-100
50 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890BC1-25
Premium Quality - Heavy Duty
Features & Benefits
• cable stub input and 66 block output
66
• protects up to 25 lines, also
available in 50 pair (1890BC1-50)
and 100 pair (1890BC1-100)
configuration
• 26 AWG swivel stub serves as a
fuse link and is equipped with a
heavy duty strain relief and
encapsulated cable connector
• built-in stand off bracket allows
for easy distribution cable routing
1890BC1-25
PREVIOUSLY
1890C-25 FC
• equipped with a cover over incoming
connection and protection modules
• stackable to allow for future service expansion
• external three position ground lug for building ground or connecting additional units
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1890BC1-25
Ordering Information
Model No.
1890BC1-25
Order No.
501001C25
Pair
Count
Input
25
25 ft. 26 AWG
shielded cable
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
6.0 x 8.5 x 5.5
9
Note: Alternate cable lengths and gauges are available upon request.
Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 51
Building Entrance Terminals (Indoor)
66
1890BC1-25
52 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890BC1-50
Premium Quality - Heavy Duty
Features & Benefits
• cable stub input and 66 block output
66
• protects up to 50 lines, also available in
25 pair (1890BC1-25) and 100 pair
(1890BC1-100) configuration
• 26 AWG swivel stub serves as a fuse
link and is equipped with a heavy duty
strain relief and encapsulated cable
connector
• built-in stand off bracket allows for easy
distribution cable routing
• equipped with a cover over incoming
connection and protection modules
• stackable to allow for future service
expansion
1890BC1-50
PREVIOUSLY
1890C-50 FC
• external three position ground lug for building ground or connecting additional units
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1890BC1-50
Ordering Information
Model No.
1890BC1-50
Order No.
511011C25
Pair
Count
Input
50
25 ft. 26 AWG
shielded cable
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
10.25 x 8.5 x 5.5
18
Note: Alternate cable lengths and gauges are available upon request.
Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 53
Building Entrance Terminals (Indoor)
66
1890BC1-50
54 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890BC1-100
Premium Quality - Heavy Duty
Features & Benefits
• 25 foot cable stub input and 66 block output
66
• protects up to 100 lines, also available in 25 pair
(1890BC1-25) and 50 pair (1890BC1-50)
configuration
• 26 AWG swivel stub serves as a fuse link and
is equipped with a heavy duty strain relief and
encapsulated cable connector
• built-in stand off bracket allows for easy
distribution cable routing
• equipped with a cover over incoming
connection and protection modules
• stackable to allow for future service expansion
1890BC1-100
PREVIOUSLY
• external three position ground lug for building
ground or connecting additional units
1890C-100 FC
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1890BC1-100
Ordering Information
Model No.
1890BC1-100
Order No.
521021C25
Pair
Count
Input
100
25 ft. 26 AWG
shielded cable
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
20 x 8.75 x 8.25
27
Note: Alternate cable lengths and gauges are available upon request.
Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 55
Building Entrance Terminals (Indoor)
66
1890BC1-100
56 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
Premium Quality - Heavy Duty
1900-25 & 1900-50 Series
c
Features & Benefits
us
• industry standard cable stub input and output
• protects up to 50 lines, also available in 100
pair (2000) configuration
• 26 AWG cable stub serves as a fuse link
Cable Stub
• equipped with a cover over the protection
modules
• external ground connectors accept 6-14 AWG
ground wire
• high density units ideal for campus environments
• accommodates industry standard 5 pin
protection modules
• designed to exceed the requirements set forth in
Underwriters Laboratory’s UL497
1900-50
(prev. 2050-50)
1900-25 and 1900-50
Ordering Information
Model No.
Order No.
Pair
Count
Input
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
1900-25*
214014C25A25
50
25 ft. 26 AWG
shielded cable
25 ft. 24 AWG
shielded cable
9.55 x 7.75 x 4.5
12.5
1900-25**
214014C15B15
50
15 ft. 26 AWG
shielded cable
15 ft. 24 AWG
unshielded cable
9.55 x 7.75 x 4.5
10
1900-50*
411011C25A25
50
25 ft. 26 AWG
shielded cable
25 ft. 24 AWG
shielded cable
9.55 x 7.75 x 4.5
12.5
1900-50**
411012C15B15
50
15 ft. 26 AWG
shielded cable
15 ft. 24 AWG
unshielded cable
9.55 x 7.75 x 4.5
10
*US Model
** Canadian Model
Note: Alternate cable lengths and gauges are available upon request.
Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 57
Building Entrance Terminals (Indoor)
1900-25 & 1900-50
us
Cable Stub
c
58 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1900-100
Premium Quality - Heavy Duty
c
Features & Benefits
us
• industry standard cable stub input and
output
• protects up to 100 lines, also available in
25 pair (1900-25) and 50 pair (1900-50)
configuration
Cable Stub
• 26 AWG cable stub serves as a fuse link
• equipped with a cover over the protection
modules
• external ground connectors accept 6-14
AWG ground wire
• high density units ideal for campus
environments
• accommodates industry standard 5 pin
protection modules
1900-100
(prev. 2000-100)
• designed to exceed the requirements set
forth in Underwriters Laboratory’s UL497
1900-100
Ordering Information
Model No.
Order No.
Pair
Count
Input
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
1900-100*
417018C25A25
100
25 ft. 26 AWG
shielded cable
25 ft. 24 AWG
shielded cable
10.75 x 10 x 4.5
24
1900-100**
417017C15B15
100
15 ft. 26 AWG
shielded cable
15 ft. 24 AWG
10.75 x 10 x 4.5
unshielded cable
20
*US Model
**Canadian Model
Note: Alternate cable lengths and gauges are available upon request.
Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 59
Building Entrance Terminals (Indoor)
1900-100
us
Cable Stub
c
60 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1900A1-100
Premium Quality - Heavy Duty
Features & Benefits
• 25 foot cable stub input and output
• protects up to 100 lines
Cable Stub
• incoming 26 AWG cable serves as
an internal fuse link and is equipped
with a heavy duty strain relief and
encapsulated cable connector
• wall or frame mountable
• external three position ground lug for
building ground or connecting
additional units
1900A1-100
• high density units ideal for campus
environments
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1900A1-100
Ordering Information
Model No.
Order No.
Pair
Count
Input
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
1900A1-100
416016C25A25
100
25 ft. 26 AWG
shielded cable
25 ft. 24 AWG
shielded cable
24.0 x 4.0 x 3.83
34
1900A1-100
416015C25A25
100
25 ft. 26 AWG
shielded cable
25 ft. 24 AWG
shielded cable
24.0 x 4.0 x 3.83
34
416014C25A25
100
25 ft. 26 AWG
shielded cable
25 ft. 24 AWG
shielded cable
24.0 x 4.0 x 3.83
34
(both stubs up)
1900A1-100
(both stubs bottom)
Note: Alternate cable lengths and gauges are available upon request.
Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 61
Building Entrance Terminals (Indoor)
Cable Stub
1900A1-100
62 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2100BN-6 & 2100B-6
Premium Quality - Heavy Duty
c
us
Features & Benefits
• bix connector input and output
• protects up to 6 lines
• ideal for small PBX installations
• accommodates QTBIX22A test shoe
• lockable cover provided
• includes internal fuse link
BIX
2100B-6
• stackable to accommodate future
expansion
(prev. 2406B-6)
• external ground connectors accept
6-14 AWG ground wire
2100BN-6
(prev. 2406BNC-6)
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
2406B
Ordering Information
Model No.
Order No.
Pair
Count
Input
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
2100B-6
201005
6
Bix connector
Bix connector
6.45 x 5.0 x 3.9
3
2100BN-6
201006
6
Bix connector
Bix connector
6.45 x 5.0 x 1.5
2
(No Cover)
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 63
Building Entrance Terminals (Indoor)
2100B-6
us
BIX
c
64 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2100BN-10
Premium Quality - Heavy Duty
c
us
Features & Benefits
• bix connector input and output
• protects up to 10 lines
• ideal for small PBX installations
• accommodates QTBIX22A test shoe
• stackable to accommodate future expansion
BIX
• includes internal fuse link
• external ground connectors accept 6-14 AWG
ground wire
• accommodates industry standard 5 pin
protection modules
• designed to exceed the requirements set forth in
Underwriters Laboratory’s UL497
2100BN-10
prev. 2410B-10
2100BN-10
Ordering Information
Model No.
Order No.
Pair
Count
Input
2100BN-10
201001
10
bix connector
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Output
bix connector
Tel: 1-800-783-6556
Dimensions
Weight
(H" x W" x D")
(lbs)
7.9 x 5.0 x 2.15
2
Specifications subject to change without notice 65
Building Entrance Terminals (Indoor)
2100BN-10
c
us
5.00"
TELECOM
1
T1
R1
2410B
2
3
4
5
6
IN
7
2
8
9
T10
R10
4
10
11
BIX
12
7.90"
13
6
14
15
T1
R1
8
16
17
18
19
10
20
OUT
21
22
23
24
T10
R10
2.15"
CAUTION
25
RISK OF ELECTRICAL SHOCK
PROTECTOR IS NOT TO BE USED WITHOUT
THE ARRESTOR ASSEMBLY INSTALLED
66 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2100BN-12, 2100B-12 & 2100SB-12
Premium Quality - Heavy Duty
c
us
Features & Benefits
• bix connector input and output
• protects up to 12 lines
• ideal for small PBX installations
• lockable cover provided
• accommodates QTBIX22A test shoe
• stackable to accommodate future expansion
BIX
• includes internal fuse link
• external ground connectors accept 6-14
AWG ground wire
• accommodates industry standard 5 pin
protection modules
2100B-12
(prev. 2412B-12)
• designed to exceed the requirements set
forth in Underwriters Laboratory’s UL497
2100BN-12, 2100B-12 & 2100SB-12
Ordering Information
Model No.
2100BN-12
Order No.
Pair
Count
Input
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
201009
12
bix connector
bix connector
10 x 5 x 2.15
2
2100B-12
201010
12
bix connector
bix connector
10 x 5 x 4
3
2100SB-12
201012
12
bix connector
bix connector
7.5 x 7.2 x 3.9
4
(no cover)
(cover & splice chamber)
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 67
Building Entrance Terminals (Indoor)
2100B-12
us
BIX
c
68 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2100B-25
Premium Quality - Heavy Duty
c
us
Features & Benefits
• bix connector input and output
• protects up to 25 lines
• includes internal fuse link
• accommodates QTBIX22A test shoe
BIX
• dust cover over the protection modules
• accommodates industry standard 5 pin
protection modules
• designed to exceed the requirements set
forth in Underwriters Laboratory’s UL497
2100B-25
2100B-25
Ordering Information
Model No.
Order No.
Pair
Count
Input
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
2100B-25
203003
25
bix connector
bix connector
8.25 x 9.25 x 4.25
5
2100BN-25
203009
25
bix connector
bix connector
8.25 x 9.25 x 2.15
4
(no cover)
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 69
Building Entrance Terminals (Indoor)
2100B-25
us
BIX
c
70 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2100BN-100 & 2100B-100
Premium Quality - Heavy Duty
c
us
Features & Benefits
• bix connector input and
output
• wall or 19” rack mountable
• protects up to 100 lines
• includes internal fuse link
• accommodates QTBIX22A
test shoe
• equipped with or without a cover over the incoming connector and protection modules
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
2100BN-100 & 2100B-100
Ordering Information
Model No.
2100B-100
2100BN-100
Order No.
231041
Pair
Count
Input
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
100
bix connector
bix connector
9.5 x 18.5 x 3.9
17
100
bix connector
bix connector
9.5 x 18.5 x 2.9
15
Note: Protection modules ordered separately
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 71
BIX
2100B-100
(prev. 2202B-100)
Building Entrance Terminals (Indoor)
2100B-100
us
BIX
c
72 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2100SB-25
Premium Quality - Heavy Duty
Features & Benefits
• bix connector input and output
• protects up to 25 lines
• unit is designed with feature that allows
for removal of damaged terminal from
multi-terminal installations
BIX
• includes internal fuse link
• accommodates QTBIX22A test shoe
2100SB-25
• equipped with a cover over incoming
connection and protection modules
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
2100SB-25
Ordering Information
Model No.
2100SB-25
Order No.
211011
Pair
Count
Input
25
bix connector
Output
bix connector
Dimensions
Weight
(H" x W" x D")
(lbs)
8.25 x 10 x 4
7
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 73
Building Entrance Terminals (Indoor)
BIX
2100SB-25
74 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2100SB-50
Premium Quality - Heavy Duty
Features & Benefits
• bix connector input and
output
• protects up to 50 lines
• includes internal fuse
link
• accommodates the
QTBIX22A test shoe
2100SB-50
(prev. 2250SBP-50)
BIX
• equipped with a removable
splice chamber should
the terminal fuse within a multiple configuration
• double locking lid system provides restricted access
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
2100SB-50
Ordering Information
Model No.
2100SB-50
Order No.
217029
Pair
Count
50
Input
bix connector
Output
bix connector
Dimensions
Weight
(H" x W" x D")
(lbs)
9.25 x 15 x 4.50
15
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 75
Building Entrance Terminals (Indoor)
BIX
2100SB-50
76 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2100SB-100
Premium Quality - Heavy Duty
c
us
Features & Benefits
• bix connector input and output
• wall or 23” rack mountable
• protects up to 100 lines
• includes internal fuse link
• accommodates QTBIX22A test shoe
BIX
2100SB-100
• equipped with a removable splice
chamber should the terminal fuse
within a multiple configuration
(prev. 2200SBP-100)
• double locking lid system provides restricted access
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
2100SB-100
Ordering Information
Model No.
2100SB-100
Order No.
231040
Pair
Count
100
Input
bix connector
Output
bix connector
Dimensions
Weight
(H" x W" x D")
(lbs)
9.2 x 24.25 x 4.5
21
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 77
Building Entrance Terminals (Indoor)
2100SB-100
us
BIX
c
78 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2100SBC-25
Premium Quality - Heavy Duty
Features & Benefits
• bix connector input and 15 foot cable stub output
• protects up to 25 lines, also available in 50 pair
(2100SBC-50) and 100 pair (2100SBC-100)
configuration
• includes internal fuse link
• equipped with a cover over the incoming
connector and protection modules
BIX
• external ground connectors accept 6-14 AWG
ground wire
• high density units ideal for campus environments
• accommodates industry standard 5 pin
protection modules
2100SBC-25
• designed to exceed the requirements set forth in
Underwriters Laboratory’s UL497
2100SBC-25
Ordering Information
Model No.
Order No.
Pair
Count
Input
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
2100SBC-25
(CDN)
206008B15
25
bix connector
15 ft. 24 AWG
unshielded cable
8.25 x 10.5 x 4
9.5
2100SBC-25
(US)
206006A15
25
bix connector
15 ft. 24 AWG
shielded cable
8.25 x 10.5 x 4
9.5
Note: Various cable gauges and lengths are available upon request.
Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 79
Building Entrance Terminals (Indoor)
BIX
2100SBC-25
80 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2100SBC-50
Premium Quality - Heavy Duty
Features & Benefits
• bix connector input and
15 foot cable stub output
• protects up to 50 lines,
also available in 25 pair
(2100SBC-25) and 100 pair
(2100SBC-100) configuration
• includes internal fuse link
2100SBC-50
(prev. 2251SBP-50)
• external ground connectors accept 6-14 AWG ground wire
• high density units ideal for campus environments
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
2100SBC-50
Ordering Information
Model No.
Order No.
Pair
Count
Input
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
2100SBC-50
(CDN)
218029B15
50
bix connector
15 ft. 24 AWG
unshielded cable
9.2 x 14.5 x 4.5
17
2100SBC-50
(US)
218028A15
50
bix connector
15 ft. 24 AWG
shielded cable
9.2 x 14.5 x 4.5
17
Note: Various cable gauges and lengths are available upon request.
Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 81
BIX
• equipped with a cover over
the incoming connector and
protection modules
Building Entrance Terminals (Indoor)
BIX
2100SBC-50
82 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
2100SBC-100
Premium Quality - Heavy Duty
Features & Benefits
• bix connector input and 15 foot cable
stub output
• protects up to 100 lines, also available
in 25 pair (2100SBC-25) and 50 pair
(2100SBC-50) configurations
• includes internal fuse link
• equipped with a removable splice
chamber should the terminal fuse
within a multiple configuration
2100SBC-100
(prev. 2211SBP-100)
BIX
• double locking lid system provides
restricted access
• external ground connectors accept 6-14 AWG ground wire
• high density units ideal for campus environments
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
2100SBC-100
Ordering Information
Model No.
Order No.
Pair
Count
Input
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
2100SBC-100
(CDN)
230036B15
100
bix connector
15 ft. 24 AWG
unshielded cable
10.25 x 18.25 x 4.5
20
2100SBC-100
(US)
220030A15
100
bix connector
15 ft. 24 AWG
shielded cable
10.25 x 18.25 x 4.5
25
Note: Various cable gauges and lengths are available upon request.
Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 83
Building Entrance Terminals (Indoor)
BIX
2100SBC-100
84 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ENS1-25
Premium Quality - Heavy Duty
Features & Benefits
• 710 connector input and 110
connector output
• protects up to 25 lines, also
available in 50 pair (1880ENS1-50)
configuration
• built-in stand off bracket allows
for easy distribution cable routing
• 26 AWG fuselink included
• designed with an internal splice
chamber and cover over incoming
connection
710
• stackable to allow for future
service expansion
1880ENS1-25
PREVIOUSLY
18907SP-25
• external ground connectors accept 6-14 AWG ground wire
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880ENS1-25
Ordering Information
Model No.
1880ENS1-25
Order No.
305307
Pair
Count
Input
25
710 connector
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
8.7 x 11.75 x 4.3
7.5
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 85
Building Entrance Terminals (Indoor)
710
1880ENS1-25
86 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ENS1-50
Premium Quality - Heavy Duty
Features & Benefits
• 710 connector input and 110
connector output
• protects up to 50 lines, also
available in 25 pair (1880ENS1-25)
configuration
• designed with an internal splice
chamber and cover over incoming
connection
• stackable to allow for future
service expansion
• 26 AWG fuselink included
1880ENS1-50
• external ground connectors accept
6-14 AWG ground wire
18907SP-50
710
PREVIOUSLY
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880ENS1-50
Ordering Information
Model No.
1880ENS1-50
Order No.
318019
Pair
Count
Input
50
710 connector
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
10.5 x 12.24 x 4.85
11
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 87
Building Entrance Terminals (Indoor)
1880ENS1-50
12.24"
4.85"
710
10.50"
1880ENS1-50
88 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ECS1-100
Premium Quality - Heavy Duty
Features & Benefits
• 710 connector input and 110
connector output
• protects up to 100 lines
• designed with an internal splice
chamber and cover over incoming
connection
• stackable to allow for future service expansion
• 26 AWG fuselink included
710
1880ECS1-100
• external ground connectors accept
6-14 AWG ground wire
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880ECS1-100
Ordering Information
Model No.
1880ECS1-100
Order No.
329031
Pair
Count
Input
100
710 connector
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
10.75 x 14.5 x 6.25
15
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 89
Building Entrance Terminals (Indoor)
710
1880ECS1-100
90 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890ECS1-25
Premium Quality - Heavy Duty
Features & Benefits
• 710 connector input and 66 block
output
• protects up to 25 lines, also
available in 50 pair (1890ECS1-50)
and 100 pair (1890ECS1-100) configuration
• double door locking lid system
for restricted or separate access
• equipped with an internal fuse link
• also equipped with a removable
splice chamber should the
terminal fuse within a multiple
configuration
1890ECS1-25
PREVIOUSLY
22257QC-25
710
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG ground wire
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1890ECS1-25
Ordering Information
Model No.
1890ECS1-25
Order No.
109007
Pair
Count
Input
25
710 connector
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
7.5 x 11.5 x 5.25
8
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 91
Building Entrance Terminals (Indoor)
710
1890ECS1-25
92 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890ECS1-50
Premium Quality - Heavy Duty
Features & Benefits
• 710 connector input and 66 block
output
• protects up to 50 lines, also
available in 25 pair (1890ECS1-25)
and 100 pair (1890ECS1-100) configuration
• double door locking lid system
for restricted or separate access
• equipped with an internal fuse link
• also equipped with a removable
splice chamber should the
terminal fuse within a multiple
configuration
1890ECS1-50
22507QC-50
710
PREVIOUSLY
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG ground wire
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1890ECS1-50
Ordering Information
Model No.
1890ECS1-50
Order No.
125023
Pair
Count
Input
50
710 connector
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
9.2 x 15.25 x 4.75
15
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 93
Building Entrance Terminals (Indoor)
710
1890ECS1-50
94 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890ECS1-100
Premium Quality - Heavy Duty
Features & Benefits
• 710 connector input and 66 block
output
• protects up to 100 lines, also
available in 25 pair (1890ECS1-25)
and 50 pair (1890ECS1-50) configuration
• double door locking lid system
for restricted or separate access
• equipped with an internal fuse link
• also equipped with a removable
splice chamber should the
terminal fuse within a multiple
configuration
1890ECS1-100
PREVIOUSLY
22007QC-100
710
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG ground wire
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1890ECS1-100
Ordering Information
Model No.
1890ECS1-100
Order No.
135032
Pair
Count
Input
100
710 connector
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
11.75 x 19.0 x 4.7
26
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 95
Building Entrance Terminals (Indoor)
710
1890ECS1-100
96 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ENM1-25
Premium Quality - Heavy Duty
Features & Benefits
• MS2 connector input and 110
connector output
• protects up to 25 lines, also
available in 50 pair (1880ENM150) configuration
• built-in stand off bracket allows
for easy distribution cable routing
• designed with an internal splice
chamber and cover over incoming
connection
• 26 AWG fuselink included
• stackable to allow for future
service expansion
1880ENM1-25
PREVIOUSLY 1890MSP-25
• external three position ground lug
for building ground or connecting additional units
MS2
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880ENM1-25
Ordering Information
Model No.
1880ENM1-25
Order No.
305006
Pair
Count
Input
25
MS2 connector
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
8.75 x 11.75 x 4.75
7.5
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 97
Building Entrance Terminals (Indoor)
MS2
1880ENM1-25
98 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ENM1-50
Premium Quality - Heavy Duty
Features & Benefits
• MS2 connector input and 110
connector output
• protects up to 50 lines, also
available in 25 pair (1880ENM125) configuration
• built-in stand off bracket allows
for easy distribution cable routing
• designed with an internal splice
chamber and cover over incoming
connection
• 26 AWG fuselink included
1880ENM1-50
PREVIOUSLY 1890MSP-50
• stackable to allow for future
service expansion
• external three position ground lug for building ground or connecting additional units
MS2
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1880ENM1-50
Ordering Information
Model No.
1880ENM1-50
Order No.
317018
Pair
Count
Input
50
MS2 connector
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
10.5 x 12.24 x 4.85
11
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 99
Building Entrance Terminals (Indoor)
1880ENM1-50
12.24"
4.85"
MS2
10.50"
1880ENP1-50G
100 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1880ECM1-100
Premium Quality - Heavy Duty
Features & Benefits
• MS2 connector input and 110
connector output
• protects up to 100 lines
• designed with an internal splice
chamber and cover over incoming
connection
• stackable to allow for future
service expansion
• 26 AWG fuselink included
1880ECM1-100
• external ground connectors accept
6-14 AWG ground wire
• accommodates industry standard 5 pin protection modules
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
MS2
1880ECM1-100
Ordering Information
Model No.
1880ECM1-100
Order No.
329030
Pair
Count
Input
100
MS2 connector
Output
110 connector
Dimensions
Weight
(H" x W" x D")
(lbs)
11 x 14.75 x 6
15
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 101
Building Entrance Terminals (Indoor)
MS2
1880ECM1-100
102 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890ECM1-25
Premium Quality - Heavy Duty
Features & Benefits
• MS2 connector input and 66 block
output
• protects up to 25 lines, also
available in 50 pair (1890ECM1-50)
and 100 pair (1890ECM1-100) configuration
• double door locking lid system
for restricted or separate access
• equipped with an internal fuse link
• also equipped with a removable
splice chamber should the
terminal fuse within a multiple
configuration
1890ECM1-25
PREVIOUSLY 2225MQC-25
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG ground wire
MS2
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1890ECM1-25
Ordering Information
Model No.
1890ECM1-25
Order No.
108006
Pair
Count
Input
25
MS2 connector
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
7.5 x 11.5 x 5.25
8
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 103
Building Entrance Terminals (Indoor)
1890ECM1-25
11.50"
OUT
T R
1
6
11
7.50"
16
MS2
21
5.25"
104 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890ECM1-50
Premium Quality - Heavy Duty
Features & Benefits
• MS2 connector input and 66 block
output
• protects up to 50 lines, also
available in 25 pair (1890ECM1-25)
and 100 pair (1890ECM1-100) configuration
• double door locking lid system
for restricted or separate access
• equipped with an internal fuse link
• also equipped with a removable
splice chamber should the
terminal fuse within a multiple
configuration
1890ECM1-50
PREVIOUSLY 2250MQC-50
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG ground wire
MS2
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1890ECM1-50
Ordering Information
Model No.
1890ECM1-50
Order No.
124022
Pair
Count
Input
50
MS2 connector
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
9.2 x 15.25 x 4.75
15
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 105
Building Entrance Terminals (Indoor)
1890ECM1-50
15.25"
T26/R26
9.20"
T1/R1
T25/R25
T50/R50
4.75"
MS2
OUT
106 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Indoor)
1890ECM1-100
Premium Quality - Heavy Duty
Features & Benefits
• MS2 connector input and 66 block
output
• protects up to 100 lines, also
available in 25 pair (1890ECM1-25)
and 50 pair (1890ECM1-50) configuration
• double door locking lid system
for restricted or separate access
• equipped with an internal fuse link
• also equipped with a removable
splice chamber should the
terminal fuse within a multiple
configuration
1890ECM1-100
PREVIOUSLY 2200MQC-100
• stackable to allow for future service expansion
• external ground connectors accept 6-14 AWG ground wire
MS2
• accommodates industry standard 5 pin protection module
• designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
1890ECM1-100
Ordering Information
Model No.
1890ECM1-100
Order No.
134031
Pair
Count
Input
100
MS2 connector
Output
66 block
Dimensions
Weight
(H" x W" x D")
(lbs)
11.75 x 19.0 x 4.7
26
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 107
Building Entrance Terminals (Indoor)
MS2
1890ECM1-100
108 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Surge Protection Modules
Solid State - Digital Series
3B1S-300, 3B1FS-240, 4B1S-300 & 4B1FS-240 Series
Balanced Operation
Description:
c
us
The 3B1S-300 & 3B1FS-240 premium series 5-pin solid-state protector modules are designed to provide
superior transient and power fault protection for most standard telephone line applications. These solidstate modules are particularly suited to applications that require the protection of very sensitive digital
equipment due to their nano-second reaction time. The balanced configuration of these modules
provides the best protection against a line-to-line, metallic surge, where there is a large voltage differential between the two sides of the circuit. The characteristics of the solid-state protector are far
superior to gas tube technology in speed of response and are virtually immune to overshoot, aging,
and failure due to repeated tripping within rated limits. The 4B1** series features PTC (positive
temperature coefficient) technology. These optional self-resetting current limiters provide effective protection from 'sneak current' faults. The PTC is vastly
superior to the competition’s heat coil solution, which requires that
the module be replaced after each 'sneak current' event.
Features:
Benefits:
•
Nanosecond response time
•
External failsafe mechanism that permanently grounds
the module under sustained high current conditions
•
Balanced operation
•
•
Longer life span than conventional gas tube and
carbon arrestors
•
Reduced 'pass through' of dangerous
transients
Integrated Test Points
•
Fewer service calls
•
UL & cUL listed, R.U.S. approved
•
Documented safe performance
•
Designed to meet or exceed Telcordia standards
•
ISO 9002 Certified Manufacturer
Order No.
DC Voltage Breakover
Pin1
Color2
3B1S-300
750029
300VDC
gold
black
3B1FS-240
750033
240VDC
gold
black
4B1S-300
750031
300VDC
gold
black
4B1FS-240
750035
240VDC
gold
black
Model No.
1
2
pin alloy refers to tip and ring pins. Unless otherwise noted, all ground pins are tin
red module shells are available upon request
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 109
Modules
3B1S-300, 3B1FS-240, 4B1S-300 & 4B1FS-240 Series
Ordering Information
Surge Protection Modules
Solid State - Digital Series
3B1S-300, 3B1FS-240, 4B1S-300 & 4B1FS-240 Series
c
us
Specifications:
DC Breakover (nominal)
@ 100V/ sec
Peak Pulse Current (max)1
@ 8 x 20 sec
@ 10 x 160 sec
@ 10 x 1000 sec
*B1FS-240
300V
240V
250A
150A
100A
250A
150A
100A
Holding Current (min)
200(mA)
200(mA)
Surge life (min operations)2
@ 10A, 10 x 1000 sec
@ 100A, 10 x 1000 sec
@ 1Arms, 1 sec
@ 10Arms, 1 sec
unlimited
>300
>60
>20
unlimited
>300
>60
>20
1
2
3
Modules
*B1S-300
*B1S-300
*B1FS-240
Capacitance
1 Vrms @ 1KHZ, 50VDC
<45 pf
<45 pf
Insulation Resistance
@ 50VDC
>100M ohms >100M ohms
Fail-safe Operation
@ 1.0A
@ 5.0A
@ 20 A
@ 60A
<50 sec
<15 sec
<10 sec
<3 sec
Current Limiters (PTC models only)
hold current (ma) @20 C =
145
R min / R max ohms
4/6
<50 sec
<15 sec
<10 sec
<3 sec
145
4/6
total surge rating is 2x listed with respect to ground during a simultaneous surge
service life requirement as per Bellcore TR-NWT-000974
pin alloy refers to tip and ring pins. Unless otherwise noted, all ground pins are tin
4B1S-300 & 4B1FS-240
3B1S-300 & 3B1FS-240
Solid State Module
(Symmetrical)
Solid State Module
(Symmetrical)
TIP
TIP
TO PROTECTED
EQUIPMENT
RING
110 Specifications subject to change without notice
TO PROTECTED
EQUIPMENT
RING
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Surge Protection Modules
3 Element Gas - Analog Series
3B1E & 4B1E Series
Description:
Balanced Operation
The 3B1E is a premium 5 pin, 3-element gas tube protector module that is designed to provide
c
excellent transient and power fault protection for most standard telephone line applications. Circa's
us
gas tube modules are perfectly suited to remote location and low pair count applications that require heavyduty current handling capability. The 3-element gas tube provides superior balanced protection. An overvoltage condition on either side of the circuit will result in the triggering of the gas tube. The ionized gas in
the common chamber provides a low impedance path to ground for both sides of the circuit. Most other
industry standard gas tube modules employ dual 2-element tubes, which create a scenario where one
side of the device could ionize faster than the other, resulting in a late arriving transient passing through
and damaging sensitive equipment. Circa's 3-element tube eliminates this potentially costly problem.
The 4B1E series features PTC (positive temperature coefficient) technology. These
optional self-resetting current limiters provide effective protection from
'sneak current' faults. The PTC is vastly superior to the competition’s
heat coil solution, which requires that the module be replaced
after each 'sneak current' event.
Features:
Benefits:
•
Heavy duty surge handling capability
•
Rugged, dependable operation
•
Superior common chamber design
•
Fewer service calls than the 2 element designs
•
Balanced operation
•
Prevents damage by “lagging” or sneak transients
•
UL and cUL listed, R.U.S. approved
•
Fewer service calls than a heat coil design
•
Integrated test points
•
Non-radioactive
•
Designed to meet or exceed Telcordia standards
•
ISO9002 certified manufacturer
Modules
3B1E & 4B1E Series
Ordering Information
1
2
Model No.
Order No.
DC Voltage Breakover
Pin1
Color2
3B1E
750001
350VDC
gold
black
4B1E
750003
350VDC (with PTC)
gold
black
pin alloy refers to tip and ring pins. Unless otherwise noted, all ground pins are tin
red module shells are available upon request
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 111
Surge Protection Modules
3 Element Gas - Analog Series
3B1E & 4BIE Series
c
us
Specifications:
3B1E & 4B1E
DC Breakover (nominal)
@ 2KV/sec
350V
Impulse Breakdown Voltage
@ 100V/ sec
@ 1KV/ sec
750V
900V
DC Holdover Voltage
Surge life (min operations)1, 2
@ 10A, 10 x 1000 sec
@ 100A, 10 x 1000 sec
@ 10kA, 8 x 20 sec
@ 20kA, 8 x 20 sec
@ 65Arms, 11 cycles, 130A
@ 10 Arms, 1 sec, 20A
1
2
3
3B1E & 4B1E
Capacitance
1 Vrms @ 1KHZ, 50VDC
135V
<150ms
>3000
>300
10
1
1
10
Insulation Resistance
@ 50VDC
>100M ohms
Fail-safe Operation
@ 1.0 A
@ 5.0 A
@ 20 A
@ 60A
<50 sec
<15 sec
<10 sec
<3 sec
Current Limiters (PTC models only)
hold current (ma) @ 20 C =
R min / max ohms =
145
4/6
total surge rating is 2x listed with respect to ground during a simultaneous surge
service life requirement as per Bellcore TR-NWT-000974
pin alloy refers to tip and ring pins. Unless otherwise noted, all ground pins are tin
3B1E Gas Tube Module
Modules
10 pf max
4B1E Gas Tube Module
(Symmetrical)
(Symmetrical)
TIP
TIP
TO PROTECTED
EQUIPMENT
RING
112 Specifications subject to change without notice
TO PROTECTED
EQUIPMENT
RING
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Surge Protection Modules
Solid State - Digital Low Voltage Series
3B3S-30 & 4B3S-75 Series
Asymmetrical Operation
c
us
Description:
The low voltage series 5-pin solid-state protector modules are designed to provide superior transient and power fault protection for most data line applications, including RS-232. The 3B3S-30 is
an ideal replacement for applications using 30 volt, 600 and 1500-watt avalanche and zener
diodes. The 30-volt solid-state module's 75 Amp 10x1000us surge rating is over twice that of
the typical 1500-watt, 30-volt avalanche or zener diode protector. The 4B3S-75 series of 5 pin
protector modules are designed for superior transient and power fault protection of most secondary 'off-hook' applications. The 4B3S-75 series also features PTC (positive temperature
coefficient) technology. These optional self-resetting current limiters provide effective protection from 'sneak current' faults. The PTC is vastly superior to the competition’s heat coil solution, which requires that
the module be replaced after each 'sneak current' event.
Features:
Benefits:
•
Nanosecond response time
•
External failsafe mechanism that permanently
grounds the module under sustained high current
conditions
•
Longer life span than conventional gas tube and
carbon arrestors
•
Reduced 'pass through' of dangerous transients
•
Integrated Test Points
•
Fewer service calls
•
UL & cUL listed
•
Documented safe performance
•
Designed to meet or exceed Telcordia standards
•
ISO 9002 Certified Manufacturer
Modules
Low Voltage Series
Ordering Information
Order No.
DC Voltage Breakover
Pin1
Color
3B3S-30
750026
30VDC
gold
red
4B3S-75 (PTC)
750024
75VDC (RUS Approved)
gold
red
Model No.
1
pin alloy refers to tip and ring pins. Unless otherwise noted, all ground pins are tin
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 113
Surge Protection Modules
Solid State - Digital Low Voltage Series
3B3S-30 & 4B3S-75 Series
c
Specifications:
us
3B3S-30
DC Breakover (nominal)
@ 100V/ sec
Peak Pulse Current (max)1
@ 8 x 20 sec
@ 10 x 160 sec
@ 10 x 1000 sec
30VDC
(27-36V)
200
150
75
75VDC
(60-95V)
250A
150A
75A
Holding Current (min)
50(mA)
150(mA)
Surge life (min operations)2
@ 10A, 10 x 1000 sec
@ 100A, 10 x 1000 sec
@ 1Arms, 1 sec
@ 10 Arms, 1 sec
unlimited
>300
>60
>20
unlimited
>300
>60
>20
1
2
3
Modules
4B3S-75
3B3S-30
4B3S-75
Capacitance
1 Vrms @ 1KHZ, 20VDC
<200 pf
<90 pf
Insulation Resistance
@ 50VDC
>100M ohms >100M ohms
Fail-safe Operation
@ 1.0 A
@ 5.0 A
@ 20 A
@ 60A
<50 sec
<15 sec
<10 sec
<3 sec
Current Limiters (PTC models only)
hold current (ma) @ 20 C =
145
R min / max ohms =
4/6
<50 sec
<15 sec
<10 sec
<3 sec
145
4/6
total surge rating is 2x listed with respect to ground during a simultaneous surge
service life requirement as per Bellcore TR-NWT-000974
pin alloy refers to tip and ring pins. Unless otherwise noted, all ground pins are tin
3B3S-30
4B3S-75
(Asymmetrical)
(Asymmetrical)
TIP
TIP
TO PROTECTED
EQUIPMENT
RING
114 Specifications subject to change without notice
TO PROTECTED
EQUIPMENT
RING
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Station Protectors
3 Element Gas - Heavy Duty
1356 Series
Balanced Operation - Heavy Duty
Description:
c
us
The model 1356 gas station protector is designed to
provide heavy duty transient and power fault protection for most standard telephone line applications. The
common chamber, 3 electrode gas tube provides true
balanced operation. An overvoltage on either side of
the circuit causes the entire tube to ionize and
grounds both sides of the circuit simultaneously. This
simultaneous grounding prevents a second arriving
transient on the opposite side to pass through the
equipment as may happen with 2 element configurations. This balanced configuration provides the best
possible protection against line to line metallic surges
where the transient on one side slightly lags the other.
1356
Nominal breakdown voltage for the model 1356 is
350VDC.
Features:
Benefits:
•
Heavy duty surge handling capability
•
Rugged, dependable operation
•
Modular, industry standard design
•
Fits most Network Interface Devices
•
Superior common chamber design
•
Reduced service calls compared to 2 element designs
•
Balanced operation
•
Prevents damage by "lagging" or sneak transients
•
UL listed
•
Documented safe performance
Model No.
Order No.
Dimensions
(H”xW”xD”)
1356
801002
1.2 x 2.25 x 1.5
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Weight
(lbs)
.08
Specifications subject to change without notice 115
Station Prot.
1356 Series
Ordering Information
Station Protectors
3 Element Gas - Heavy Duty
1356 Series
c
Specifications:
us
DC Breakdown (nominal)
@ 2KV/sec
350V
Impulse Breakdown Voltage
@ 100V sec
@ 1KV/ sec
750V
900V
DC Holdover Voltage
135V
< 150ms
Surge life (min operations)1
@ 10A, 10 x 1000 sec
@ 100A, 10 x 1000 sec
@ 10kA. 8 x 20, sec
@ 20kA. 8 x 20, sec
@ 65rms, 11 cycles, 130A total
@ 10 Arms, 1 sec, 20A total
1
>1000
>300
10
1
1
10
Capacitance
1 Vrms @ 1KHZ, 50VDC
<10 pf
Insulation Resistance
@ 50VDC
>1m ohms
Fail-safe Operation
@ 1.0 A
@ 5.0 A
@ 20 A
@ 60A
<40 sec
<20 sec
<5 sec
<1 sec
service life requirement as per Bellcore TR-NWT-000974
Circa 1356 Gas Station Protector
Symmetrical
TIP
Station Prot.
TO PROTECTED
EQUIPMENT
RING
116 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Station Protectors
Solid State
Model 1360
Asymmetrical Operation
Model 1360B
Balanced Operation
Description:
c
us
The models 1360 and 1360B are designed to provide
superior transient and power fault protection for most
standard station protection applications. The characteristics of the solid state protector are far superior to
gas tube technology in speed of response to faults and
are virtually immune to overshoot, aging, and repeated
tripping within rated limits. The balanced configuration
(model 1360B) provides the best protection against line
to line metallic surges where the transient on one side
slightly lags the other. A surge on either side of the line
will cause both sides of the device to fire, providing
simultaneous grounding. Nominal breakdown voltage
for both devices is 300VDC.
All station protectors come with an external fail-safe
1360
mechanism that ensures safe operation even under
the most adverse conditions. Under continuous surge
conditions, the device will short both sides of the circuit to ground.
1360 & 1360B Series
Ordering Information
Order No.
Breakdown Voltage
Dimensions
(H”xW”xD”)
1360
801006
300 Volts
1.2 x 2.25 x 1.5
.08
1360B
801007
300 Volts
1.2 x 2.25 x 1.5
.08
1360-240V
801012
240 Volts
1.2 x 2.25 x 1.5
.08
1360-30V
801008
30 Volts
1.2 x 2.25 x 1.5
.08
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Weight
(lbs)
Specifications subject to change without notice 117
Station Prot.
Model No.
Station Protectors
Solid State
1360 & 1360B Series
c
us
Specifications:
1360
1360B
DC Breakdown (nominal)
@ 100V/ sec
300V 300V
Peak Pulse Current (max)1
@ 8 x 20 sec
@ 10 x 160 sec
@ 10 x 1000 sec
250A 250A
150A 150A
100A 100A
Holding Current (mA)
Surge life (min operations)2
@ 10A, 10 x 1000 sec
@ 100A, 10 x 1000 sec
@ 1Arms, 1 sec
@ 10 Arms, 1 sec
1
2
200(min)
unlimited
>300 >300
>60 >60
>20 >20
1360
1360B
Capacitance
1 Vrms @ 1KHZ, 50VDC
<100 pf
<100 pf
Insulation Resistance
@ 50VDC
>100M ohms
>100M ohms
Fail-safe Operation
@ 1.0 A
@ 5.0 A
@ 20 A
@ 60A
<50 sec
<15 sec
<10 sec
<3 sec
<50 sec
<15 sec
<10 sec
<3 sec
Balanced Operation
No
Yes
total surge rating is 2x listed with respect to ground during a simultaneous surge
service life requirement as per Bellcore TR-NWT-000974
1360 Solid State Station Protector
(Asymmetrical)
Circa 1360B Station Protector
(Symmetrical)
TIP
TIP
TO PROTECTED
EQUIPMENT
Station Prot.
TO PROTECTED
EQUIPMENT
RING
118 Specifications subject to change without notice
RING
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Station Protection Enclosures (Outdoor)
1357 Series
c
Features & Benefits
us
• accepts up to two 1356 gas or 1360 solid
state type station protection modules
• easy installation
• ultra-violet weather resistant housing
• lid locks into position
• removable knock-out and guides on back of
unit to mount onto 3/4" conduit and/or conduit
connector
• scalloped body design allows for easy
replacement of protector module
1357-2G
• ground post molded directly into the housing,
therefore the unit does not require an additional T-post ground adapter
1357-0
• includes flexible rubber grommet at wire entrance
• includes universal mounting screws
1357 Series
Ordering Information
Model No.
Order No.
Type of Protection
Dimensions
(H”xW”xD”)
Pair
Count
1357-0
837038
1357-1G
837037
1356 Gas Station Protector
4.78 x 3.2 x 2.17
1
.36
1357-2G
837041
1356 Gas Station Protector
4.78 x 3.2 x 2.17
2
.44
1357-1S
837039
1360 Solid State Station Protector
4.78 x 3.2 x 2.17
1
.36
1357-2S
837040
1360 Solid State Station Protector
4.78 x 3.2 x 2.17
2
.44
1357-1SB
837042
1360 Solid State Station Protector
Balanced
4.78 x 3.2 x 2.17
1
.36
1357-2SB
837043
1360 Solid State Station Protector
Balanced
4.78 x 3.2 x 2.17
2
.44
4.78 x 3.2 x 2.17
Tel: 1-800-783-6556
.28
Specifications subject to change without notice 119
Station Prot.
Issued Spring 2007,  Circa Enterprises Inc.
Weight
(lbs)
Station Protection Enclosures (Outdoor)
1357 Series
c
us
4.78"
3.20"
Station Prot.
2.17"
120 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Station Protection Enclosures (Outdoor)
CT512 & CT525 Series
Features & Benefits
• accepts 1356 gas or 1360 soliid state type
station protection modules
• easy installation
• ultra-violet weather resistant U.L. V94 rated
plastic housing
• lid locks into position
CT512-12G
• includes flexible rubber grommet at wire
entrance
• includes universal mounting screws
• available in 3 - 30 pair configuration
• may be utilized in place of network interface
device
• security fasteners restrict access to authorized
personnel only
CT525-25G
CT512 & CT525 Series
Ordering Information
Order No.
Type of Protection
Dimensions
(H”xW”xD”)
CT512-0
838001
Empty Enclosure
7.9 x7.5 x3.35
0
CT512-(3-12)
Various
Gas or Solid State Protector
7.9 x 7.5 x3.35
3-12
CT525-0
838020
Empty Enclosure
14 x 9.85 x 4.65
0
CT525-(13-30)
Various
Gas or Solid State Protector
14 x 9.85 x 4.65
13-30
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Pair
Count
Weight
(lbs)
1
2
Specifications subject to change without notice 121
Station Prot.
Model No.
Station Prot.
Station Protection Enclosures (Outdoor)
122 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Outdoor)
3000P Series
Features & Benefits
• weather resistant U.L. V94 rated plastic housing
• available in 6, 10, 12 and 25 pair configuration
• termination options available in IDC (66 clip)
and bix block
• may be utilized in place of network interface
device
• eliminates requirement for internal closet space
• security fasteners restrict access to authorized
personnel only
3006QCP
3000P Series
Ordering Information
Model No.
Order No.
Pair
Count
Input
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
909002
6
66 block
66 block
7.9 x 7.5 x 3.35
2.0
3010QC2P
909004
10
66 block
66 block
15 x 9.85 x 4.65
2.5
3012QC2P
909003
12
66 block
66 block
15 x 9.85 x 4.65
3.0
3025QC2P
909005
25
66 block
66 block
15 x 9.85 x 4.65
8.5
3006BP
909008
6
bix connector
bix connector
7.9 x 7.5 x 3.35
3.5
3010BP
909006
10
bix connector
bix connector
15 x 9.85 x 4.65
5.5
3012BP
909001
12
bix connector
bix connector
15 x 9.85 x 4.65
6.0
3025BP
909007
25
bix connector
bix connector
15 x 9.85 x 4.65
8.5
Outdoor
3006QC2P
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 123
Outdoor
Building Entrance Terminals (Outdoor)
124 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Building Entrance Terminals (Outdoor)
NEMA 4X Series
Features & Benefits
• telecommunication protection for outdoor applications
• high durability fibreglass construction especially well suited
for corrosive and high humidity environments
• protects from water, dust, dirt and oil
• meets NEMA/EEMAC Type 4X standards
• available in 6, 12, 25, 50 & 100 pair configurations
4025-QC
(modules ordered seperately)
• termination options include 66 Block and 110 Connection
• external mounting screws not included
• a lockable hinged cover allows for access by authorized
personnel only
Applications:
• PBX system protection between remote facilities
4100-110
• retrofit or new installation for residential applications
• temporary outside plant cable installations in trailers or portables
4000N Series
Ordering Information
Model No.
Order No.
Pair
Count
Input
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
904000
6
110 block
110 block
13.81 x 11.85 x 6.5
12.0
4006-QC
904001
6
66 block
66 block
13.81 x 11.85 x 6.5
12.0
4012-QC
904002
12
66 block
66 block
13.81 x 11.85 x 6.5
13.0
4025-110
904003
25
110 block
110 block
13.81 x 11.85 x 6.5
13.5
4025-QC
904004
25
66 block
66 block
13.81 x 11.85 x 6.5
13.5
4050-QC
904007
50
66 block
66 block
16.27 x 14.40 x 8.13
20.0
4050-110
904005
50
110 block
110 block
16.27 x 14.40 x 8.13
20.0
4100-110
904006
100
110 block
110 block
16.27 x 14.40 x 8.13
23.0
Outdoor
4006-110
Note: Protection modules ordered separately.
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
Specifications subject to change without notice 125
Building Entrance Terminals (Outdoor)
Outdoor
NEMA 4X Series (6-25 pair box shown)
126 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Central Office Connectors
4486 Series
c
us
Features & Benefits
• maximum density space saving unit
• accepts a wide variety of industry standard
protection modules
• user-friendly front facing cross connect field
and test blocks
• unit marked for easy pair identification
• large, well-spaced fanning strips allows for
clean jumper wire management.
• quick release system on rear cover allows for
access to panel field for wirewrap input
4486
4486
Ordering Information
Model No.
Order No.
Stub
Input
Direction
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
4486
611001
stubless -------
IDC connector
8.57 x 4.45 x 10.4
7
4486
622001
stubless -------
Wire Wrap
8.57 x 4.45 x 10.4
7
4486
611012A30
bottom
30 ft. 24 AWG
shielded stub
IDC connector
8.57 x 4.45 x 10.4
19
4486
622012A30
bottom
30 ft. 24 AWG
shielded stub
Wire Wrap
8.57 x 4.45 x 10.4
19
4486
611002A30
top
30 ft. 24 AWG
shielded stub
IDC connector
8.57 x 4.45 x 10.4
19
4486
622002A30
top
30 ft. 24 AWG
shielded stub
Wire Wrap
8.57 x 4.45 x 10.4
19
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
CO
Note: Various cable gauges and lengths are available upon request.
Protection modules ordered separately.
Specifications subject to change without notice 127
Central Office Connectors
4486 Series
us
CO
c
128 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
Central Office Connectors
3355 Series
Features & Benefits
• maximum density space saving unit
• accepts a wide variety of industry standard
protection modules
• user-friendly front facing cross connect field
and test blocks
• unit marked for easy pair identification
• large, well-spaced fanning strips allows for
clean jumper wire management.
• quick release system on rear cover allows for
access to panel field for wirewrap input
3355
3355
Ordering Information
Model No.
Order No.
Stub
Input
Direction
Output
Dimensions
Weight
(H" x W" x D")
(lbs)
3355
655001
stubless -------
IDC connector
9.5 x 10.75 x 4.0
8
3355
666001
stubless -------
Wire Wrap
9.5 x 10.75 x 4.0
8
3355
655012A30
bottom
30 ft. 24 AWG
shielded stub
IDC connector
9.5 x 10.75 x 4.0
20
3355
666012A30
bottom
30 ft. 24 AWG
shielded stub
Wire Wrap
9.5 x 10.75 x 4.0
20
3355
655002A30
top
30 ft. 24 AWG
shielded stub
IDC connector
9.5 x 10.75 x 4.0
20
3355
666002A30
top
30 ft. 24 AWG
shielded stub
Wire Wrap
9.5 x 10.75 x 4.0
20
Issued Spring 2007,  Circa Enterprises Inc.
Tel: 1-800-783-6556
CO
Note: Various cable gauges and lengths are available upon request.
Protection modules ordered separately.
Specifications subject to change without notice 129
Central Office Connectors
CO
3355 Series
130 Specifications subject to change without notice
Tel: 1-800-783-6556
Issued Spring 2007,  Circa Enterprises Inc.
High Density Rackmount Protector
RMP300XLBET Protector
c
us
Circa’s high density, space saving, 300 pair rackmount protector can be mounted 6 units high allowing for up to 1800
pairs of protection on a standard 7 foot tall, 23 inch rack or
2400 pairs without the cross-connect field. A complete readyto-assemble rack can be ordered or all parts can be
ordered individually to accommodate custom design builds.
Custom cable stub lengths are also available upon request.
Features & Benefits
•
accommodates industry standard 5 pin protector modules
•
Amphenol (RJ21) connectors are available on a mounted plate for quick
connection to the telephone system from the 300 pair cross-connect 110 block.
•
includes the necessary hardware for mounting the protector and 300 pair
110 or Bix block with wire management (small or large wire management available)
•
external ground lug for building ground connection
•
designed to exceed the requirements set forth in Underwriters Laboratory’s UL497
•
custom cable stub lengths available upon request
•
26 AWG swivel stubs serve as fuse links
RMP300XLBET
Ordering Information
Protector
Order No.
Pair Input Output
Dimensions
Model No.
Count
(H” x W” x D”)
RMPXLBET-1800
332310C25
1800 25' Stub 110/RJ w/ Large Wire Mgmt
84.0 x 24.25 x 18.0
RMPXLBET-300-LWM 332311C25
300 25' Stub 110 connector w/ Large Wire Mgmt 9.40 x 24.00 x 8.23
RMPXLBET-300-SWM332312C25
300 25' Stub 110 connector w/ Small Wire Mgmt 9.40 x 24.00 x 8.23
RMPXLBET-300
332302C25B25 300 25' Stub 25' Stubs
9.40 x 24.00 x 8.23
RMPXLBET-300
332302C25B1RJ300 25' Stub 1' Male RJ
9.40 x 24.00 x 8.23
Order No.
Connector
332305B1RJ
332306B2.5RJ
332307B1RJ
332308B2.5RJ
332304
332303
MM15-0129
MM15-0130
MM15-0131
1' Female RJ
2.5' Male RJ
1' Female RJ
2.5' Male RJ
Issued Spring 2007,  Circa Enterprises Inc.
Dimensions
(H” x W” x D”)
11.0 x 11.0 x 3.5
11.0 x 11.0 x 3.5
11.0 x 11.0 x 3.5
11.0 x 11.0 x 3.5
6.5 x 24.0 x 2.5
84.0 x 24.0 x 6.0
1.5 x 23.5 x 1.0
2.5 x 23.5 x 4.5
6.0 x 23.5 x 7.5
Tel: 1-800-783-6556
Specifications subject to change without notice 131
High Density
Accessories
Model No.
300 Pair Female Pre-wired 110 Block
300 Pair Male Pre-wired 110 Block
300 Pair Female Pre-wired Bix Block
300 Pair Male Pre-wired Bix Block
RJ Connector Plate
High Density BET Rack (Empty)
Mounting Bar
Small Wire Management
Large Wire Management
High Density Rackmount Protector
High Density
RMP300XLBET Protector
132 Specifications subject to change without notice
Tel: 1-800-783-6556
Premium Quality - Heavy Duty
Issued Spring 2007,  Circa Enterprises Inc.
High Density Rackmount Protector
High Density
RMP300XLBET Protector
136 Specifications subject to change without notice
Tel: 1-800-783-6556
Premium Quality - Heavy Duty
Issued Spring 2007,  Circa Enterprises Inc.