asterisk users - Mar 2006 - PLEASE respond: how to get Asterisk to change coders on RTP handoff??

I have a hardware FXO/FXS which handle my voip calls, and they support G723
internally.  Asterisk hands off these calls just fine, and everything works, as
long as I don't want PBX menues available...  The problem is, once I want it
to return messages, it will only return them as GSM... which is fine, since my
FXO/FXS support multiple coders.  However, even though Asterisk lets me specify
a list of valid coders, it will only use one...

I want Ast to use GSM to playback messages, then when it hands off the call to
the endpoints, it should tell them to use G723 in the RE-INVITE messages... I
don't see any way to get it to do this; *is* there some way??
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Dan Miller wrote:
> I want Ast to use GSM to playback messages, then when it hands off the call
to the endpoints, it should tell them to use G723 in the RE-INVITE messages... I
don't see any way to get it to do this; *is* there some way??
No. Asterisk does not currently have the ability to initiate a codec
change during a call.