asterisk users - Oct 2012 - dropping audio on avaya

I am using 1.4.43 connected on PRI to avaya PBX.

If I call one extension through the PRI and speak a message (recorded 
file) sounds fine.
If I call an extension through the PRI that brings together a group of 
phones on the avaya side
and play the same recorded file the audio drops out.

What might that be from?

THanks,

Jerry