Private Branch Exchange (PBX) System Accessories (3 items)

FXO (Foreign Exchange Office) The Analog Trunk FXO is an interface that connects to a trunk line, like the one from your service provider. It receives ringing voltage and battery from FXS devices. ...

2FXO + 2FXS (Foreign Exchange Office & Foreign Exchange Station) 2FXO + 2FXS is mixed interface of foreign exchange office and foreign exchange station that connect to office and station. It includ...

ISDN Primary Rate Interface (PRI) Overview ISDN Basic Rate Interface (BRI) is a digital connection that provides three digital channels. These channels consist of two 64 kbps Bearer channels (B-cha...