Conference Problem:

Unanswered Question
Sep 25th, 2007


I have CCM 4.1(3). We have configured Cisco IOS Conference Bridge on 3845 router. Device pool applied is Default with Codec G.711.

Following are the details collected from 3845.

IP address of my phone is is Voice Gateway. I initiated two calls via Voice gateway and did the conference. The people on the other end were able to hear my voice. But I was not able to hear their voice.

50335377 48141361 conf sendrecv g729 20 16958 19164

50335377 48141345 conf sendrecv g729 20 18252 20444

50335377 48141377 conf sendrecv g729 30 21074 24168

Need help to troubleshoot above problem urgently.

I have this problem too.
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htarra Mon, 10/01/2007 - 06:57

Added check to not send request to play conference end announcemnt when there are no participants in the conference. This condition caused the setNextTimer() function to go into a loop. Also I think you have to add codecs missing on the IP Voicemedia Streaming APPS from the Service parameters. Just select them with the CTRL key pressed. then Update . Also would like to restart the IP VOICEMEDIA STREAMING APPS service on both calmanagers. You are not able to hear their voice because might be there is a device in receiving section.

hemant.wavhal Mon, 10/01/2007 - 07:02


Thanks a lot for the solution.

Where can i check both the settings ?

I have already selected Codecs G.711 and G.729 for IP Voice Media Streaming Application. Also restarted the service.

Problem still persist.

Please suggest.

hemant.wavhal Mon, 10/01/2007 - 07:17


How can i check the codec Setting on VG 3845 ?

Do you have any reference command to check the codec?

CapitaServicedesk Tue, 10/02/2007 - 01:11

You can check codec configurations at 2 places on a VG

1. Under global config, if you have defined voice class codec

2. Is under dial-peer configuration

To define these



conf t


voice class codec 1

specify the codecs you want to use,

(in your case it would be G711ulaw & g729r8)


under dial-peer mention this command for the codec to take effect


dial-peer voice 1 voip

destination pattern xxx

session target ipv4:

voice class codec 1

dtmf-relay h245 alphanumeric

no vad


dial-peer voice 1 pots

incoming-called no .



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