Dialogic 6.2 Manuale Utente

The Bfv API Functions

November 2009

38

Media processing refers to the application that is performed on the 

Brooktrout modules. Depending on the product configuration, it can 

include:

„

Signal generation and detection

„

Voice play and record

„

Faxing 

„

File format manipulation

With the signal generation and tone detection functions, you can: 

„

Play call progress signals and generate other tone groups and 

tone patterns.

„

Get the next call progress code.

„

Enable and disable DTMF detection.

„

Discard tones from a buffer.

„

Wait for a tone and return it as an ASCII character or return it 

without disturbing the buffer.

„

Play a tone for a specified time.

„

Play a single frequency tone or a custom tone.

„

Replace a tone in the buffer for reuse.

Brooktrout module receive call progress signals generated by telcos 

and Private Branch Exchanges (PBXs) before, during, and after 

dialing. The module’s call progress analysis process then interprets 

them.

During call progress analysis, modules can report dial tone 

detection, ring-back, busy signals, remote fax tone detection, and 

other important information. Applications can use this information 

to determine their next course of action, to display the status of a 

call, or to track billing information. Applications can use postdialing 

results, such as HUMAN and BUSY, to decide what redialing strategy 

to use.

Brooktrout modules can also generate and play DTMF and MF tone 

groups and single tone patterns to send to the telco or PBX.