1、 TIA TELECOMMUNICATIONS SYSTEMS BULLETIN Telecommunications - Multiline Terminal Systems - Comparison of PBX Transmission Requirements in Standards TIA-464-C and ETSI ES 201 168 Version 1.1 TSB-147 JUNE 2004 TELECOMMUNICATIONS INDUSTRY ASSOCIATION The Telecommunications Industry Association represen
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26、ovided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TSB-147 iForeword (This foreword is not part of this document.) This TIA Telecommunications Systems Bulletin (TSB) is jointly produced by: - Telecommunications Industry Association
27、(TIA) Subcommittee TR-41.1, Multiline Telecommunications Systems (MLTS), and - European Telecommunications Standards Institute (ETSI) Technical Committee (TC) Speech processing, Transmission and Quality aspects (STQ). The document is being published as a TIA TSB and as an ETSI EG (ETSI Guide). The d
28、ocument is not an industry standard and compliance to its contents is voluntary. The document compares corresponding Private Branch eXchange (PBX) transmission requirements in TIA and ETSI standards to be considered when developing equipments or standards intended for global application. ETSI has gr
29、anted TIA permission to use copyrighted material from ES 201 168, “Speech processing, Transmission and Quality aspects (STQ); Transmission characteristics of digital Private Branch eXchanges (PBXs) for interconnection to private networks, to the public switched network or to IP gateways”, in this TI
30、A TSB. Likewise, TIA has granted ETSI permission to use copyrighted material from ANSI/TIA-464-C, “Multiline Terminal Systems; Requirements for PBX Switching Equipment”, in the EG. The TR-41.1 Engineering Technical Subcommittee acknowledges the contribution made by the following individuals in the d
31、evelopment of this TSB. Name Representing Jean Marie Notter Alcatel ETSI STQ rapporteur Francois Pinier Alcatel Richard Frank Dietrich Lockard Group Joachim Pomy Tenovis Gmbh Volker Sypli RegTP Tailey Tung Siemens TIA TR41.1 Chair Essential, or potentially Essential, IPRs notified to ETSI in respect
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34、permitted without license from IHS-,-,-TSB-147 1Introduction Over the last decade, continuing telecommunications improvements have brought the continents closer together digital signaling allows calls to be established in less than a second and digital transmission has improved voice quality. Such c
35、hanges have made it convenient to call anywhere in the world without a thought being given to past difficulties in completing such calls with acceptable transmission quality. These improvements have made it possible for multi-national companies to efficiently conduct business in a real-time environm
36、ent and to be able to efficiently design and produce world-wide products. This gives impetus to international telecommunications equipment suppliers and users of such equipment to consider the differences in transmission requirements of PBX systems that are manufactured for different world marketpla
37、ces. This document provides a comparison of North America and European PBX standards with the goal of creating maximum commonality for serving the global PBX marketplace, while recognizing the existence of differences in regional telecommunications environments, regulatory practices, geographic cons
38、traints, and customer expectations. Technical differences between the TIA and ETSI standards are identified and rationalized. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TSB
39、-147 21 Scope This document compares, in an orderly manner, the transmission requirements in ANSI/TIA-464-C-2002, “Requirements for Private Branch eXchange (PBX) Switching Equipment” and those in ES 201 168 version 1.2.1, “Speech processing, Transmission and Quality aspects (STQ); Transmission chara
40、cteristics of digital Private Branch eXchanges (PBXs) for interconnection to private networks, to the public switched network or to IP gateways”. Since only the PBX transmission requirements in ANSI/TIA-464-C and ES 201 168 are compared, it is necessary to examine relevant portions of the scope of e
41、ach of these standards to gain an overall idea of the scope of the comparison. ES 201 168 provides transmission requirements while ANSI/TIA-464-C provides transmission requirements as well as other PBX parameters, e.g., signaling and supervision. All appearance of ANSI/TIA-464-C in this TSB includes
42、 ANSI/TIA-464-C-1 “Telecommunications Multiline Terminal Systems Requirements for PBX Switching Equipment, Addendum 1. The following table is an overview comparison of the two documents: TIA-464-C ES 201 168 SCOPE Digital PBX Digital PBX with Test Point TRAFFIC 3.1 kHz voice 3.1 kHz voice CODING (at
43、 interface to network) -law A-law Measurement Port-to-Port (full-channel) Port-to-test point (half-channel) INCLUDES (interfaces): Analog Digital Cordless Loud-speaking (hands-free) Proprietary sets Yes Yes No No Yes Yes Yes Yes No Yes Non-transmission requirements Yes No Test methods for compliance
44、 No Yes Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TSB-147 32 References The following documents contain provisions which, through reference in this text, constitute provis
45、ions of the present document. References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. 1 ITU-T Recommendation G.12
46、2 (1993): “Influence of national systems on stability and talker echo in international connections”. 2 ITU-T Recommendation G.711 (1988): “Pulse code modulation (PCM) of voice frequencies”. 3 ITU-T Recommendation G.712 (2001): “Transmission performance characteristics of pulse code modulation channe
47、ls”. 4 ITU-T Recommendation O.41 (1994): “Psophometer for use on telephone-type circuits”. 5 ITU-T Recommendation Q.551 (2002): “Transmission characteristics of digital exchanges”. 6 ETSI TR 101 802 Version 1.1.1 (June 2000): “Speech processing, Transmission and Quality aspects (STQ); The Concept of
48、 Relative Levels”. 7 ANSI/TIA-464-C-2002: “Telecommunications Multiline Terminal Systems - Requirements for PBX Switching Equipment”, including ANSI/TIA-464-C-1 “Telecommunications Multiline Terminal Systems Requirements for PBX Switching Equipment, Addendum 1”. 8 ETSI ES 201 168 Version 1.2.1-2000:
49、 “Speech processing, Transmission and Quality aspects (STQ); Transmission characteristics of digital Private Branch eXchanges (PBXs) for interconnection to private networks, to the public switched network or to IP gateways”. 9 ANSI/TIA-968-A-2002 and ANSI/TIA-968-A-1-2003 for Telecommunications - Telephone Terminal Equipment - Technical
