Question on codec

Unanswered Question
Mar 29th, 2010


Would like to know the following,

When intially the call has set up, by default from the pabx travel via to the router gateway (by isdn or e&m trunk) is it in codec G.711 ?

Have done a monitor on our router gateway it shows as follow

0/1/1:15.1      g711ulaw   n  S_SETUP_INDICATED     S_TSP_INCALL

Only when the call going into the router gateway after going through the configuration it shows as follow

0/1/1:15.1      g729r8     n  S_ALERTING            S_TSP_INCALL

Is there anyway to configure in such that the set up will be g729 instead in the router gateway setting ?

Thank you
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Volodymyr Morskyy Mon, 03/29/2010 - 11:09

It seems like your call have no dial-peer to match and then default dial-peer is matched (it has g729 in its configuration).

alanhow2007 Mon, 03/29/2010 - 19:01

Dial-peer has been set right as follow

voice class codec 1
codec preference 1 g729r8


dial-peer voice 2002 voip
translation-profile outgoing Append8
preference 3
destination-pattern .T
progress_ind setup enable 3
progress_ind progress enable 8
translate-outgoing calling 2
session target ipv4:x.x.x.x
incoming called-number .T
dtmf-relay h245-alphanumeric
voice-class codec 1
fax rate 7200 bytes 48
ip qos dscp af21 signaling
no vad


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