A.3.1.1 Fax Without Sip Re-Invite; Figure A-8: Fax Transfer Enabled For Ip-To-Isdn (E.g., T.38 Relay) - AudioCodes MediaPack MP-40x series User Manual

Figure A-8: Fax Transfer Enabled for IP-to-ISDN (e.g., T.38 Relay)

A.3.1.1 Fax without SIP RE-INVITE

The use fax without a SIP RE-INVITE transaction (fax autotransition), the user can add
T.38 as coder. If T.38 is added a coder it is negotiated in the SDP exchange. If Fax is
successfully negotiated, the system will switch to fax (T.38) without an additional SIP RE-
INVITE transaction.
Note: For fax autotransition Fax Signaling Mode must be set to T.38 Relay.
User's Manual 166
MediaPack BRI Series
Document #: LTRT-83702