All,
I'm working on an Asterisk 1.0.7 system that is acting as a B2BUA SIP gateway. "canreinvite=no" is set in the global section of sip.conf, and it's important that it be there. I have
Cisco ---> Asterisk ---> Multiple destinations
Some destinations support both G711 and G729, but some only support G729, and some do not support G729.
On Cisco, I have:
voice class codec 3 codec preference 1 g711alaw codec preference 2 g711ulaw codec preference 3 g729r8
On Asterisk, I have (irrelevant parts snipped) in sip.conf:
[g729only] type = friend host = 192.168.1.1 disallow = all allow = g729
[g711only] type = friend host = 192.168.1.2 disallow = all allow = alaw allow = ulaw
[cisco] type = friend host = 10.1.1.1 disallow = all allow = alaw allow = ulaw allow = g729
I've also tried without the disallow and allows in [cisco], and with them in [general].
When I call from the Cisco to g711only via Asterisk, the call works. When I call from the Cisco to g729only via Asterisk, I get:
Apr 16 15:56:41 NOTICE[11297]: Unable to find a path from g729 to alaw Apr 16 15:56:41 NOTICE[11297]: Unable to find a path from alaw to g729
In a SIP trace, in the INVITE from Cisco to Asterisk, I see:
a=rtpmap:8 PCMA/8000. a=rtpmap:0 PCMU/8000. a=rtpmap:18 G729/8000. a=fmtp:18 annexb=no. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-16.
In the INVITE from Asterisk to g729only:
a=rtpmap:8 PCMA/8000. a=rtpmap:0 PCMU/8000. a=rtpmap:18 G729/8000. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-16. a=silenceSupp:off - - - -.
In the 200 OK from g729only:
a=rtpmap:18 G729/8000/1. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15.
When Asterisk gets this message, it replies to g729only with a ACK then a BYE, and sends a 403 Forbidden to the Cisco. At no point does Asterisk send any message to the Cisco suggesting that Alaw is not acceptable or that G729 is allowed.
My question to you, Asterisk-users, is why Asterisk drops the call when both sides have offered G729? It seems to think that the Cisco is Alaw only; this is the default codec on Cisco, but it is offering other codecs as well.
I've tried various settings. I can also make G729 work but G711 fail, but can't do both at the same time. I've also tried the following on Cisco:
voice class codec 2 codec preference 1 g729r8 codec preference 2 g729br8 codec preference 3 g723r63 codec preference 4 g723r53 codec preference 5 g723ar63 codec preference 6 g723ar53 codec preference 9 g711alaw codec preference 10 g711ulaw codec preference 11 gsmfr codec preference 12 gsmefr
With the dial-peer changed to use it, but this doesn't help either.
(Hostnames and IP addresses changed to protect the guilty, i.e. me)
-- Alistair Cunningham, Integrics Ltd, +44 (0)7870 699 479 http://integrics.com/ _______________________________________________ Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
