Dialogic Dialogic Global Call IP IP Phone User Manual


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106 Dialogic
®
Global Call IP Technology Guide — November 2007
Dialogic Corporation
IP Call Scenarios
should follow the scenarios described in Section 3.4.5, “Sending a Request to Switch From T.38
Fax to Audio”, on page 103, Section 3.4.6, “Receiving a Request to Switch From T.38 Fax to
Audio”, on page 104, or Section 3.4.7, “Terminating a Call After a T.38 Fax Session”, on page 105.
Note: The application must call the gc_SetUserInfo( ) function with a GC_PARM_BLK that contains a
set ID of IPSET_FOIP and a parameter ID of IPPARM_T38_DISCONNECT to disassociate the
devices in any of the scenarios.
If the application times out when switching to audio (that is, it does not receive a
GCEV_EXTENSION event with an IPPARM_READY parameter within the timeout period), it
should follow the scenarios described in Section 3.4.1, “Sending T.38 Fax in an Established Audio
Session”, on page 98, Section 3.4.2, “Receiving T.38 Fax in an Established Audio Session”, on
page 99, or drop the call as if in audio session.
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