[Asterisk-Users] codec negotiation
Nguyen Hoang Lan
dtkhang at hn.vnn.vn
Tue Dec 21 09:29:33 MST 2004
Hello Eduardo,
Wednesday, December 17, 2003, 1:08:00 AM, you wrote:
EG> Hi list,
EG> I'm with a little problem on codec negotiation between a cisco827 and
EG> asterisk.
EG> My sip.conf is like that:
EG> [general]
EG> port = 5060
EG> bindaddr = 0.0.0.0
EG> context = default
EG> amaflags = default
EG> allow=g729
EG> allow=gsm
EG> allow=alaw
EG> allow=ulaw
EG> ;disallow=all
EG> and cisco like that:
EG> dial-peer voice 6 voip
EG> destination-pattern 0T
EG> session protocol sipv2
EG> session target ipv4:<asterisk-ip>
EG> dtmf-relay rtp-nte
EG> codec g711alaw
EG> no vad
EG> !
EG> When I try to make a call, cisco shows codec g711alaw, but asterisk
EG> shows codec g729A (i have the licenses) and there is no audio. When I
EG> try disallow=g729, the same occurs, but this time asterisk shows codec
EG> gsm.
EG> The only way to make a call is allowing only alaw. But this is not
EG> convenience, since i need to use g279 with another endpoint (working
EG> ok).
EG> Why this negotiation problem happens?
Try to add to cisco peer (not shown in your mail)
[cisco]
....
disallow=all
allow=alaw
--
Best regards,
Nguyen mailto:dtkhang at hn.vnn.vn
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