G729 Passthru


I did purchased G729 licenses from www.digium.com, but recently heard g729 passthru is allowed.

Below is my setup. Can you please confirm that i can do regular voice calls & ivr etc, with out licenses:

Cisco 7940 <–>Asterisk<–>Cisco2851(VoiceGateway)<–>PSTN

Cisco 7940 & Cisco2851 have G729 licenses.

When i tried to get it worked, i got following error:

-- Executing [18002662277@users:2] Dial("SIP/3190-b7701ea0", "SIP/") in new stack

[Jul 26 15:01:19] WARNING[3297]: chan_sip.c:3024 sip_call: No audio format found to offer. Cancelling call to 18002662277
– Couldn’t call
== Everyone is busy/congested at this time (0:0/0/0)
== Auto fallthrough, channel ‘SIP/3190-b7701ea0’ status is ‘CHANUNAVAIL’

Please suggest. (Do i need to install g729 opensource module anywhere? i read about Intel drivers etc…but not sure how to install them on asterisk.