Telecommunications Industry Association
TR41.3-12-06-008
Document Cover Sheet
Project Number
PN-3-XXXX
Document Title
TIA-810-B Revisions
Source
Cisco Systems, Inc.
Contact
Tim Lawler
170 West Tasman Dr.
San Jose, CA 95134
Distribution
TR-41.3.3
Intended Purpose
of Document
(Select one)
X
Phone: (408) 527-0681
Fax: (408) 853-3288
Email: tlawler@cisco.com
For Incorporation Into TIA Publication
For Information
Other (describe) -
The document to which this cover statement is attached is submitted to a Formulating Group or
sub-element thereof of the Telecommunications Industry Association (TIA) in accordance with the
provisions of Sections 6.4.1–6.4.6 inclusive of the TIA Engineering Manual dated October 2009, all
of which provisions are hereby incorporated by reference.
Abstract
This contribution recommends that the “Handset Receive Volume Control” requirements in TIA-810-B,
clause 6.2.3 be changed from determining the “Volume Control” gain from RLR measurements to
conversational gain measurement from TIA-4965. This contribution also provides updates to the
“Normative References”.
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Telecommunications Industry Association
TR41.3-12-06-008
The purpose changes are shown with the “Track Changes” on.
3. Normative References
The following standards contain provisions, which, through reference in this text, constitute provisions of
this Standard. At the time of publication, the editions indicated were valid. All standards are subject to
revision, and parties to agreements based on this Standard are encouraged to investigate the possibility of
applying the most recent editions of the standards indicated below, or their successors. ANSI and TIA
maintain registers of currently valid national standards.
[1]
ANSI/IEEE Standard 269-2010, Standard Methods for Measuring Transmission Performance of
Analog and Digital Telephone Sets, Handsets and Headsets.
[2]
ANSI/IEEE Standard 1329-2010, Standard Method for Measuring Transmission Performance of
Handsfree Telephone Sets.
[3]
ANSI S1.4-1983 (R2006), Sound Level Meters.
[4]
ANSI/TIA-4965-2012, Receive Volume Control Requirements for Digital and Analog Wireline
Terminals
[5]
ASTM D 2240-2002, Standard Test Method for Rubber Property - Durometer Hardness.
[6]
ITU-T Recommendation G.122 (03/1993), Influence of national systems on stability and talker
echo in international connections.
[7]
ITU-T Recommendation G.711 (11/1988), Pulse code Modulation (PCM) of voice frequencies.
[8]
ITU-T Recommendation O.41 (10/1994), Psophometer for use on telephone-type circuits.
[9]
ITU-T Recommendation O.131 (11/1988), Quantizing distortion measuring equipment using a
pseudo-random noise test signal.
[10]
ITU-T Recommendation P.51 (08/1996), Artificial Mouths.
[11]
ITU-T Recommendation P.53 (1994), Psophometer for use on telephone-type circuits.
[12]
ITU-T Recommendation P.57 (11/2005), Artificial ears.
[13]
ITU-T Recommendation P.64 (09/1999), Determination of sensitivity/frequency characteristics of
local telephone systems.
[14]
ITU-T Recommendation P.1010 (7/2004), Fundamental voice transmission objectives for VoIP
terminals and gateways.
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Telecommunications Industry Association
TR41.3-12-06-008
4. Definitions, Abbreviations and Acronyms
6.2.3. Handset Receive Volume Control Performance
The current regulatory volume control requirements are specified in 47 CFR Part 68.317.
NOTE - The conversational gain measurements in TIA-4965 use a HATS (Head and Torso
Simulator) while the current 47 CFR Part 68.317 references ROLR measurements in ANSI/EIA/TIA579-1991, which specifies the Type 1 ear (ITU-T Recommendation P.57).
6.2.3.1.
Measurement Method
The measurement method for receive volume control performance for digital terminal is in clause 4.4.2(2)
of TIA-4965.
6.2.3.2.
Requirement
The requirement for receive volume control performance for digital terminal is in clause 4.4.1 of TIA4965.
To ensure that there is no significant clipping, the receive signal to total distortion and noise ratio at the
maximum volume control setting shall be greater than 20 dB with a 1004 Hz, -16 dBm0 input. (See
clause 6.5.2 for test method.)
NOTE - Some special purpose CPE provide high receive gain for hearing impaired users. These CPE
are intended to provide the highest gain for below normal input signal levels, and they might fail the
distortion requirement at the maximum volume control setting when measured with the specified test
signal level.
6.2.4. Magnetic Field for Hearing Aid Coupling
This standard does not contain Magnetic Field for Hearing Aid Coupling requirements. The current
regulatory hearing aid compatibility magnetic output requirements are specified in 47 CFR Part 68.316.
NOTE - Part 68.316 does not provide suitable references for testing Digital Telephones. Suitable test
procedures are available in TSB-31-D, Part 68 Rationale and Measurement Guidelines for US
Network Protection.
Annex F
(informative) – Bibliography
TSB-31-D, Part 68 Rationale and Measurement Guidelines for US Network Protection.
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