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Dialogic
®
Global Call IP Technology Guide — November 2007 99
Dialogic Corporation
IP Call Scenarios
3.4.2 Receiving T.38 Fax in an Established Audio Session
In this scenario, the user application uses the Dialogic
®
Global Call API to open a Media device,
configures “Manual” operating mode and establishes an audio session with the remote device. See
Section 4.26.2, “Specifying Manual Operating Mode”, on page 322 for more information on
manual mode. To prepare to receive fax, the application must also open a T.30 Fax device. During
the audio session, the application can be notified of an incoming request to switch from audio to
T.38 fax.
The application can choose to accept or reject this request. If the user chooses to accept, Dialogic
®
Global Call API notifies the application that the T.38 session is ready to receive a fax. Figure 41
shows the scenario diagram.
Note: The application must not use both Dialogic
®
Global Call API and Dialogic
®
IP Media Library API
functions on the same device. The Dialogic
®
IP Media Library API calls (ipm_) in Figure 41 are
shown for informational purposes only. Global Call interacts with the IP Media Library on behalf
of the application.