[cisco-voip] CUCM MTP and g729

Anthony Holloway avholloway+cisco-voip at gmail.com
Fri Jan 11 15:11:56 EST 2013


Hi All,

I have a wireshark capture off of my CUCM 8.6(2) which shows that it is
receiving a g729 audio stream from my VG224.

Long story short, according to the CUCM SRND, the CUCM MTP can only
terminate g711, and yet, attached is a screenshot of the wireshark capture
which clearly shows it terminating g729.

What piece of this puzzle am I missing?  Also, the CUCM traces read like
the MTP is being invoked on that CUCM.  It's due to the lack of the fm
package on my VG224 and a mismatch in DTMF to the PSTN (SIP).  I had a fun
time resolving that, as you can probably imagine.

Thanks and Happy Friday!
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