We have an external FXO/FXS, and use Asterisk as a call router. We
want to use G723 for the actual phone calls, because we have limited bandwidth
on our return direction. This has been working fine so far.
However, now we want to set up Asterisk to handle PBX menues and accept
extentions. Asterisk, of course, uses GSM for its messages, and cannot
terminate G723 calls. So I want to tell Asterisk, FXO, and FXS to use GSM
for messages and G723 for the data connection. The FXO/FXS would support
this, but Asterisk isn't working as I wish. Though I can provide it with a
list of coding schemes:
; set up
codecs
disallow=all allow=gsm allow=g723.1 allow=g729 It never uses anything but the first one. So if I use the above
scheme, messages are played successfully, but the calls go through using
GSM. If I put G723.1 first, Asterisk aborts with an error message (cannot
convert gsm to g723.1).
Is there some way I can solve this problem, such as explicitly telling * to
use GSM for its messages, and G723 for the handed-off data
connection??
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