Quote:
Originally Posted by kieranmullen
what codecs are used at the pstn gateways?
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I don't know if it's the same for all the PSTN gateways, but the Brisbane (Australia) SIP Broker PSTN gateway ( +61 7 3018 2881 ) supports these...
Code:
m=audio 18512 RTP/AVP 0 18 8 111 97 3 4 101
a=rtpmap:0 PCMU/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:8 PCMA/8000
a=rtpmap:111 G726-32/8000
a=rtpmap:97 iLBC/8000
a=rtpmap:3 GSM/8000
a=rtpmap:4 G723/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSupp:off - - - -
(posted in
http://forum.voxalot.com/sip-broker-...necessary.html )