Wed Apr 6 11:30:11 2011
Asterisk developer's documentation
Asterisk supports T.38 fax passthrough, origination and termination. It does not support gateway operation. The only channel driver that supports T.38 at this time is chan_sip.
UDPTL is handled very much like RTP. It can be reinvited to go directly between the endpoints, without involving Asterisk in the media stream.
References:
Generated on Wed Apr 6 11:30:11 2011 for Asterisk - The Open Source Telephony Project by
1.4.7