Dialogic 6.2 Manuale Utente

Processing Media Using the T.38 Protocol

November 2009

241

This diagram shows how the protocols work together during the call:

In all cases the application must establish the call first using the IP 

call control protocol. The call control protocol is responsible for the 

initial call set up and tear down. 

Your application can perform transport independent fax 

transmission and reception using the Bfv API fax functions. The 

application is unaware of the mode of transport (PSTN or SIP). 

Dialogic supports all fax functions for Fax over IP. See Volume 4, 

Fax Processing, Bfv API Reference Manual for more information 

about Fax functions.

 

PSTN 

 

 

 

 

IP 

T.30

protocol

stack

T38

UDP or

TCP

T38

Demodulation
Remodulation

V.17

T.30

protocol

stack