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ITU-T G.131

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ITU-T G.131

Talker echo and its control

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This Recommendation provides guidance on the effect of talker echo and its control. Talker echo is considered independently of all other impairments. Furthermore, the conjunction of talker echo and the E-model of ITU-T Rec. G.107 is explained as well as the reference to ITU-T Rec. G.108.2 on transmission planning aspects of echo cancellers is provided. Previous versions of this Recommendation included a clause on stability that has been deleted because modern networks are largely all four-wire. Earlier versions of this Recommendation contained several planning rules for connections with echo control devices. As many of those rules are now obsolete, they are not reproduced here. A new Appendix III on the Combined effects of talker echo in the presence of absolute delay has been added.

Author ITU
Editor ITU
Document type Standard
Format File
ICS 33.040.30 : Switching and signalling systems
Number of pages 18
Replace ITU-T G.131 (1996-08)
Year 2003
Document history ITU-T G.131 (2003-11)
Country International
Keyword CCITT G.131;ITU-T 131;131;ITU-T G.131