PRI and BRI ( ISDN)

There are two main services associated with ISDN Basic Rate Interface (BRI) and Primary Rate Interface (PRI). Both services consist of multiple channels over which data can be sent (known as B channels) and also include a signaling channel (the D channel). The D channel is used for control and signaling purposes, such as setting and tearing down ISDN call. Referred to as out-of-band signaling, this method ensures that other ISDN calls do not interfere with existing connections, that bandwidth on the B channels is reserved for data only, and ultimately results in quicker call setup and teardown.


Asterisk Card AEX410

Placa E1 T1 | Placa FXS FXO PBX IP

Carte E1 RNIS | Carte FXS FXO analogique

Asterisk card voip pbx fxo fxs card