[VoiceOps] T38 over Sip

Alex Balashov abalashov at evaristesys.com
Fri Aug 28 08:44:53 EDT 2009

Also, all this T.38 magic applies to V.21 (14.4 kbps) faxing.

As Scott Berkman can attest - we were mutually involved in a rollout 
related to this some months ago - the Cisco T.38 implementation doesn't 
support relay at Super G3 (V.34) speeds, nor does it detect Super G3 
preambles properly in order to attempt a switch to T.38 at any relay 
speed.  Have fun with that.  :-)

Alex Balashov - Principal
Evariste Systems
Web     : http://www.evaristesys.com/
Tel     : (+1) (678) 954-0670
Direct  : (+1) (678) 954-0671

More information about the VoiceOps mailing list