Dialogic 6.2 Manuale Utente

The Bfv API Functions

November 2009

40

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:

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.