SECTION 512-210-101
BELL SYSTEM PRACTICES
Issue 3, October
AT&TCo Standard
1975
SEPARATELY MOUNTED KEYS
6017, 6026, AND KS-21254 LEVER TYPES
IDENTIFICATION, INSTALLATION, AND CONNECTIONS
1.
6017S
GENERAL
6017T
(a)
l
This section is reissued to include information
6017U
on KS-21254 type keys.
6017W*
2A Key Telephone Systems
6017Y
(b)
Connection information consists of a schematic
1A Key Private Line Circuit
6017AA
Station Signal - Key Equip­
of the keys involved. For connection to these
ment 102A
keys, refer to the system in which they are
6017AB
used.
6017AC
6017AK
2.
6017ALt
IDENTIFICATION
l
General
6017AM
5A Key Equipment
6017AN
(a)
Purpose:
5B Key Equipment
Data Application - 4-Wire
these keys are referred to as
lever type and are used to perform general
Line- Equipped with 14A
t
6017AR I
switching functions in station systems.
6017AP
(b)
6026A*
Ordering Guide:
guard-stamped
LINE
and
TEST at front and rear lever
positions, respectively.
4A Key Equipment (without
hold, may be used with 1A
KEY
Key Telephone System)
PRINCIPLE USE
6017A
Station Switching
6017B
2-Line Pickup
4A Key Equipment with Hold
6026B
4-Wire Private Line Termi­
6026C
nation
6026D
4A Key Equipment (without
6017C
Station Ringing Key
6017D
4-Wire Private Line Systems
hold, may be used with 1A or
6017E
3-Line Pickup
1A1 Key Telephone System)
6017G
Switching Key Used in No.
6017H
Signal
750A or 755A PBX
Control - 2-Wire
Line - Station and Control
Circuit
Line Cutoff in 1A and 1A1
6017J
*
Manufacture Discontinued.
t
Contacts must be wired to terminal as required.
See Fig. 3.
Key Telephone Systems
Note:
6017K
5A Key Equipment With 100-
furnished with a black handle but are available
Type Loudspeaker
with red or white handle when specified on
6017L
5B Key Equipment With 100-
order.
6017M
6017P
}
6017R
All 6017- and 6026-type keys are
Type Loudspeaker
Loudspeaker and Paging Sys-
KS-21254,L1§
•Replaces 6017A key, DPDT
terns
(Bat position) top ON, center
750A or 755A PBX Control
OFF, and bottom ON
NOTICE
Not for use or disclosure outside the
Bell System except under written agreement
Printed in U.S.A.
SSP 512-210-101-i01_1975-10-0l.jpg
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Page 1
SECTION 512-210-101
KS-21254,L2§
Replaces 6017B key, DPDT
(Bat position) top ON, center
NONE, and bottom ON
KS-21254,L3§
Replaces 6017C key, DPDT
(Bat position) top ON, center
NONE, and bottom ON:!:
KS-21254,L4
Replaces 6017D, H, J 4PDT
(Bat position) top ON, center
NONE, and bottom ON
P-132718 OR
801327180 (RED)
P-140271 OR
801402710 (WHITE)
:1: Indicates a momentary or nonlocking position.
1-13/16
IN.
Fig. 1-6017-Type Keys
§ Use only terminals designated 2A, B, C and
4A, B, C.
All KS-21254 type keys are available
with the covers in the following colors by
adding proper color suffix: Black (-03), Green
(-51), White (-58), or Light Beige (-60). The
base of all keys is a black plastic .•
Note:
(c)
Design Features:
6017-Type Key (Fig. 1)
•
Consists of a key unit and terminal strip
mounted in a black metal housing.
•
Not equipped with a designation card holder.
A 98A designation strip is available but
must be ordered separately. Use a P-476882
designation card or make from good grade
of paper approximately 9/16 by 5/16 inch.
P-237768 OR
802377689
COVER SCREW
Fig. 2-6026-Type Keys
6026-Type Key (Fig. 2)
•
•
Consists of a key unit, jacks for a 52- or
53-type head telephone set, and a terminal
strip mounted in a black metal housing.
This type key is supplied with a designation
card holder. Use a E1164 or E1165 (cut to
size) designation card.
.KS-21254 Key (Fig. 5, 6, 7, or 8)
•
Consists of a toggle switch, flexible wiring
strip with screw terminals for making
electrical connections, and molded plastic
cover held to base by serrated locking nut
at front (Fig. 5) and snap fit at the rear.
Page 2
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ISS 3, SECTION 512-210-101
•
Electrical cord channel is provided with four
teeth-like protrusions which acts as a cord
stay to prevent cord from being dislodged
(Fig. 6).
•
Will mount on 77A mounting bracket (ordered
separately) so key can be attached to baseplate
of telephone set (Fig. 7 and 8).
•
Key can be fastened to desk, wall, etc. by
appropriate screws or fasteners not furnished
with key .•
(2) Remove four screws securing key to
housing.
(3) Place guard over lever.
(4) Secure guard and key to housing with
screws provided with guard.
(5) Replace key lever handle.
3.
(f)
The lOA guard is another type designed to
hold a 6017-type key in the operated or
nonoperated position. The guard fits over the
key lever and is held in either position by the
lever handle being tightened against it. The
lever handle must be unscrewed to change the
lever position and then retightened. The lOA
guard is used in special service applications and
must be ordered separately.
INSTALLATION
(a) Locate 6017- or 6026-type key where readily
accessible to user and designation strip can
be seen.
(b) Face of key should be flush with edge of
desk or table. Discourage knee well installations
because of space limitations and possible accident
hazards.
(g) •Locate the KS-21254 key where readily
accessible by attaching to telephone set using
77A mounting bracket or fasten key to desk,
wall, etc. Terminate electrical connections as
required. A simplified schematic of the key is
shown inside the key cover (Fig. 6).•
(c) To limit number of holes in customer's
furniture, key and associated equipment may
be mounted on a common backboard.
Place leads between s crewhead and
(d) Keys are furnished for right-hand mounting
on desk or table. To mount 6017-type key
on left side, remove screws holding key to box
and invert key. For 6026-type key, reverse
cover and back.
(e) A 14A guard (ordered separately) is available
to prevent accidental operation of 6017-type
keys in special service applications. Mounting
screws furnished with guard. To mount 14A
guard:
(1) Unscrew key lever handle and remove.
washer.
Do not place leads between
flexible wiring strip and washer. For
KS-21254, List 1, 2, and 3 keys, us e
only terminals 2A, B, C and 4A, B,
C. The other terminals a r e not
connected for these keys. For List 4
key, all terminals are connected.
4.
CONNECTION INDEX
Fig. 3-6017-Type Lever Keys, Schematics
Fig. 4-6026-Type Lever Keys, Schematics
Page 3
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feb 04,2012 16:56:45
SECTION 512-210-101
•0 3
+
f-.
��----103
:�
::
T
,L
t
f-
•0 6
L-----10 6
6017B KEY ADJUSTED FOR
BREAK-BEFORE-MAKE
NO. 6017A
f.__'_:�
-'-�------=:
NO. 6017C
6017K ADJUSTED FOR
MAKE-BEFORE-BREAK
NO. 60178, K
.------10
if"o03
1�4
3
__,:�
if._
___
I
: �·-------<10 6
T
L___ : :
/IWI!'-<>----<: :
---.
f-
tL--�I0 s
NO. 6017D
10
10
I
I
I+
r
fJ
it
I
I
NO. 6017H
NO. 6017G
NO. 6017E
:t
10
10 9
10 8
::
::
103
102
101
I
I
I�
t
f-
:F
I
I
:!
t
1
::
104
::
::
109
::�
10 12
10
sQlo
Scanned by Frank Harrell. (Cowboy Frank) Castle Rock, Colorado Feb 04,2012 16:57:02
t II
I Qlo
Fig. 3-6017-Type lever Keys, Schematics (Sheet 1 of 4)
BSP 512-210-101-i01_1975-10-Q4.jpg
1
4�
f II
3Qlo
I
2Qlo
NO. 60l7J
Page 4
2
II
NO. 6017L
ISS 3, SECTION 512-210-101
LOCKING
NO.
-+-+ NONLOCKING
KS- 8108 BUZZER
FOR 6017T
KS-8109 BUZZER
FOR 6017U
somA
�·--�o0 1
f--
N0.6017T,U,WIMD)
::
t
o0 45
.---o0
L
tL--�o0 s
NO.
NO. 60175
6017P
I
-----. :
I
16
17
18
I+
:
:
NO.
I+
14
� -+- T
'
l
tl
II
10
Y-1
-+- NONLOCKING
IS
�I E
LOCKING
4
1101
12
13
�
·�
6017R
� 17
�
5 :=:TII
�\_, --t-+
10
�
_j:
It
NO.
12
J
It
I
I
6017Y
.n.
I
�I
13
15
JJ
I
�
15
14
s===::
ir==-:
7
•
NO.
6
� 18
6017AK
Fig. 3--6017-Type Lever Keys, Schematics (Sheet 2 af 4)
Page 5
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Feb 04,2012 16:57:47
SECTION 512-210-101
LOCKING
0
7
I6
II
e>-+------J II
15�1
14 �
13� --+NO. 6017AA
9:�
0----J1
e-.--, I1
�
12�
+------+
:�
2
I
�8
�9
NO. 6017AB
�
0---J
NO. 6017AC
NO. 6017AM
NO. 6017AL
NO. 6017AN
Fig. 3--6017-Type Lever Keys, Schematics (Sheet 3 of 4)
Page 6
Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado
--+-
:�
10
NONLOCKING
70 80 90100 110120
1 0 2 0 30.40 50 60
SSP 512-210-101-i01_197S-10-06.jpg
0+--o----'-,
12 � :
13 0+--<>--T
14 e------J
5�:
II
LOCKING
� NON LOCKING
1 �
18 �
1 �
Feb 04,2012 16:58:05
ISS 3, SECTION 512-210-101
LOCKING -+- NONLOCKING
KS-8108 BUZZER
FOR 6017T
KS-8109 BUZZER
FOR 6017U
NO. 'soi7M
'r
--<oQ> I
---
1-----
NO. 6017T , U , W (MD)
::
lr---:--:
t
NO. 60175
'-----IQ> 6
NO. 6017P
4
,..,.
r>.
13
15
16
17
18
r>.
:
:
r>.
n.
1�
)_1
I+
� II
l
t:I
�I
I
�·
T
+-t-+
'
I
NO. 6017Y
I
'-----+:
--r
·�
:
r
!
:I t
�
�
14
.,.,. 12
II
LOCKING
""" 10
� 17
4�
"""
·�
1
""" 6
--f-- NONLOCKING
::-=:t
�
�\; -+-
11
I
1
12
13
E
l6
15
14
r=::
:c-=:
7
1____.0
I
I
6
18
NO. 6017AK
NO. 6017R
Fig. 3-6017-Type Lever Keys, Schematics (Sheet 2 af 4)
Page 5
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Feb 04,2012 16:58:24
SECTION 512-210-101
NO. 6017AA
LOCKING
+-------+
NONLOCKING
18 ?--1
17�
I 6 e-..----J I
1 5 � 1I
14 �
13� -+-
LOCKING -t--+ NON LOCKING
10�
I I 0+--<>----'-,
12 � :
13 �
14 � -+7
10 � I1
II �
12 0-.---J NO. 6017AB
2�
I 0-.--J NO. 6017AC
��
9 0-.--J1
�
:�: c:::
:�
!C::�
•03
v'
70 80 90100 110120
1 0 20 30 40 s0 s0
NO, 6017AL
�:
NO. 6017AM
NO. 6017AN
Fig. 3--6017-Type Lever Keys, Schematics (Sheet 3 af 4)
Page 6
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ISS 3, SECTION S12-210-101
�
r
R4
�
Lwv-,
'<./
R2
'U
13
14
15
10
II
12
�
�
ll
I
�:
Lwv-,RI
�
�
�
L
�
t
t
I
l!
'<-'
t
T
NO.
�
6
�
'<J
�
1--if
:
4
R3
�
.
R3, R4-510n
RS-12on
17
18
0 16
13
�
14
�
�
Rl, R2-6oon
-
15
16
10
II
12
�
�
�
'<-'
�
�
�
'<-'
R5
6017AP
R2
1
�
fI
I
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f--4
l
t:
t
NO.
r
-x>
'X)
t
I
I
I
17
7'�
,-,. 18
r
A
ll
�
•
-x.>
Rl-13on
R2-130n
R3-126on
R3
6017AR
Fig. 3-6017-Type Lever Keys, Schematics (Sheet 4 of 4)
Page 7
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SECTION 512-210-101
r
�
�
0
L
•
�
I
215A
JACK
361C
�
r�
LJ
HOLD
0
..
38
VARISTOR
c:.
215A
JACK
�
I
I
I
I
""
POSITION
�
�u
L
I
TALK
361C
10
Jr--
t
OFF
,.,.
:t
iL_
�
�
fr
�
�
'[
�u
�
I
r�
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38
VARISTOR
4
0
,.,.
I
n.
I
I
,.,.
c:.
I
0
""
6026A
60268
�
�
t
237A
JACK
_n,
10
4
I
215A
I
0
JACK
�
n.
L------+--�--� 10
"'
38
VARISTOR
60260
6026C
Fig. �026-Type lever Keys, Schematics
Page 8
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2
ISS 3, SECTION 512-210-101
SERRATED
LOCKING NUT
Fig. 74KS-21254 Type Key Installed With 2500-Type
Telephone Set Using 77A Mounting Brackett
Fig. ,54KS-21254 Type Keyt
COVER (SIMPLIFI ED
SCHEMATI C I NSI DE)
77A MOUNTING
BRACKET AND
SC REWS
MOUNTING
BRACKET
CORD HOLDI NG
PROTR U SIONS
(4)
o\�
Fig. 8-.l nterior View of KS-21254, List 4 Key
Showing Leads Terminatedt
COVER
LOCKING NUT
Fig. �KS-21254, List 4 Key, Cover Removed and
77A Mounting Brackett
Page 9
9 Pages
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