I’ve encountered a problem with t38 passthru on asterisk 1.6.x.
I’m trying to send fax from VoIP operator (one peer) to another peer (fax software - Commetrex). On Asterisk 1.4 it works perfectly, however in 1.6 the t38 is negotiated (re-invite), but the training of t38 is not finished.
(messages CSI Num, DIS DSR, no-signal, and cng are flowing, however there is no training).
Part of my sip.conf
t38pt_udptl = yes
the definition of my peer:
Any help would be really appreciated.