Does CCME use G.729 for non-local subnet calls by default ?

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Jun 11th, 2008
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Hi,


I cant seem to find this info, but it looks like when I have dial-peers configured on ccme, and I get a call from a non-local subnet, the call seems to use G.729 by default.


Is this the default behaviour for calls that come in to CCME from a non-local subnet ?


Thanks

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gpulos Wed, 06/11/2008 - 09:27
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The codec CME uses is not 'subnet' specific.


With CME, all calls, by default, are g729 for VOIP dial-peers. (g711 for POTS dial-peers)


You can adjust the codecs to be used by using the 'codec' command under your dial-peers.


Another way to allocate codecs is to create a 'voice class codec' and define a list of codecs and their priority for use; then assign the voice class to the dial-peer.


Please see the following link for more information on default CME codec:

http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/admin/configuration/guide/cmebasic.html#wp1101736

paolo bevilacqua Wed, 06/11/2008 - 15:33
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That is all correct expect that pots DP have no default codec precisely because they are not voip DP.

shahedvoicerite Thu, 06/12/2008 - 02:42
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Thanks, I did see that link but it only mentions defaults for SIP endpoints.


SCCP->SCCP calls for 2 phones registered use G.711 (no dial-peers involved, as they are ephones)


The document does not seem to be clear as to what is the default for


H.323 (Eg CM originated) --> SCCP endpoint


H.323 (CM Originated) ---> TCL / VXML application



Certainly the best thing to do is specify the codec and remove any doubts.


Thanks

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