[Asterisk-Users] g729

[Daniel Corbe]

Hello,

I've inherited a (now) broken asterisk implementation.  It seems as if
there are currently codec tanscoding issues in this box.  Specifically
I am receving calls from a SIP proxy in G.729 and attempting to
transcode them to ULAW.

My asterisk installation was working up until yesterday.

The information I have found on the voip-Asterisk wiki is for a third
party open-source implementation of asterisk (which doesn't seem to be
what was deployed on this asterisk box at all); however there are
glaring warnings all over the place about possible legal implications
of  using this codec.  Moreover the words "GPL Violation" are printed
and duplicated many times over in the form of an E-Mail from Mark
Spencer attached to the Wiki.

The documentation does not; however tell me the correct and 100% legal
way to license and implement G.729.

In short this server is broken and I don't know what to do because I'm
afraid of possibly being in direct violation of the GPL by following
the voip-Asterisk wiki's documentation.

Can someone kindly point me to an RTFM in the form of Digium-supported
licensing options for G.729 and some technical documentation on how to
acctually do the implementation?

Or perhaps someone could suggest a fix for my current issues:

Here's a log snippet from my asterisk console:

Feb  8 22:19:19 NOTICE[1125329728]: channel.c:1683
ast_set_read_format: Unable to find a path from ULAW to G729A
Feb  8 22:19:19 NOTICE[1125329728]: channel.c:1650
ast_set_write_format: Unable to find a path from G729A to ULAW
   -- SIP/2101-aaf2 answered SIP/19544342000-375a
   -- Attempting native bridge of SIP/19544342000-375a and SIP/2101-aaf2
   -- Attempting native bridge of SIP/19544342000-375a and SIP/2101-aaf2
Feb  8 22:19:19 NOTICE[1225991488]: channel.c:1683
ast_set_read_format: Unable to find a path from G729A to ULAW
Feb  8 22:19:19 NOTICE[1225991488]: channel.c:1650
ast_set_write_format: Unable to find a path from ULAW to G729A
Feb  8 22:19:19 WARNING[1225991488]: chan_sip.c:1797 sip_write: Asked
to transmit frame type 256, while native formats is 4 (read/write =
4/4)

Now both channels in question have allow=ulaw and allow=g729

Any help at all would be appriciated.

Regards,
Daniel