Asterisk - The Open Source Telephony Project GIT-master-3dee037
T.38 support :: UDPTL

Asterisk supports T.38 fax passthrough, origination and termination. It does not support gateway operation.

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:

  • udptl.c
  • app_fax.c
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