With ISDN PRI, almost all modern voice and data communication systems from PBXs, mainframe and distributed systems through to your company LAN/WAN can be connected to your ISDN service. The use of routers, multiplexers, ISDN controllers and video/audio conferencing units is also supported. Additionally, Digital Telephone Switches can use our Direct Inward Dialing (DID) facility over PRI. DID offers a single interface for up to 30 concurrent calls, as well as for up to two hundred free DID extensions. Our PRI line Etisalat is all you need.