Communication Manager Release 6: with Vtech phones, Dial a calling card "800" number, then call a 10-digit number - one way audio

Doc ID    SOLN218446
Version:    6.0
Status:    Published
Published date:    03 Sep 2019
Created Date:    15 Jan 2013
Author:   
Danny Himmel
 

Details

Caller cannot be heard.
Contains: 00.1.510.1
CM Reports as: R016x.00.1.510.1
CM Release String: vcm-016-00.1.510.1

UPDATES:
Update ID Status Type Update description
------------------------------- ------------ ------- ---------------------------
00.1.510.1-19009 activated cold patch 19009 for 00.1.510.1


Platform/Security ID Status Type Update description
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Messaging ID Status Type Update description
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Vtech SIP phones emulating Avaya 9640.

Problem Clarification

Getting one way audio when using Vtech SIP phones (emulating Avaya 9640) dialing out on a SIP line using a calling card or joining a conference call.

Cause

Vtech devices were sending DTMF via RFC2833 (which is how they were certified with Avaya).

Solution

Changed to in-band signaling


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