Hi!
> Is it possible to set codecs on ss7 link?
No. E1s channels (which chan_ss7 uses as voice channels) can only use
G711 alaw.
> Or receiving call with g723 or g729 and forward the call to pstn via the ss7
> link.
You can do transcoding on the asterisk machine that you use as SS7
Gateway. This means you get the calls delivered via SIP with G723 and
send them out to SS7 with G711. Note that you need more processingpower
for this then if you do no transcoding.
Best regards
Kai
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