HOW to force the codec to G729 when using ephones with ccme ?
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there is no way to make a compressed call with cme.
only g711 is possible from ip-phone to ip-phone if the phones are registered on the same cme router.
Codec is configured at dial peer level. See Configuring VoIP Dial Peers
Also see Configuring Codec Selection Order in the same chapter.
The codec statement is platform and ios-version specific.
with ccme i don't need to configure a dial-peer voice because ephones are connected directly to the gateway (not to a separate callmanager).
even if we configure codec under "dial-peer voice 1 voice" the call is always made with g729
thanks for your clear answer.