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The Bfv API Functions
November 2009 40
Fax Functions
The Bfv API provides a wealth of fax functions that allow you to
control every aspect of sending and receiving V.17 or V.34 faxes.
The fax functions are divided into high-, mid-, and low-level
functions. Volume 4, Fax Processing, Bfv API Reference Manual
provides a detailed description of each Bfv function.
Generally, the high-level functions simplify the process of
transmitting and receiving facsimiles. Since the high-level functions
incorporate many of the appropriate low-level functions to
automatically perform the basic low-level tasks, applications using
the high-level functions are freed to perform other tasks. For
example, the high-level function BfvFaxSend is constructed of
these mid- and low-level functions:
BfvFaxBeginSend
BfvFaxEndOfDocument
BfvFaxGetRemoteInfo
BfvFaxSendPage
BfvFaxSetLocalId
BfvFaxWaitForTraining
The high-level functions trade the maximum flexibility and control
provided by the low-level functions for ease of programming.
The mid-level functions provide more flexibility and control than the
corresponding high-level functions, but they require more knowledge
of and attention to the basic steps involved in sending and receiving
facsimiles.
The low-level functions provide the greatest flexibility and control
over sending and receiving facsimiles, but they require extensive
knowledge of and attention to the basic steps involved in each of
these tasks. For example, applications can screen phone calls based
on an ID string or NSF information with the low-level functions, but
not with the high-level functions.
Both the high- and mid-level functions use only infopkt files, so the
distinction between them is measured in the flexibility and control
they provide. The low-level functions, however, use only raw data
files.