Some people may say that ISDN is dead, but that’s news to the millions who rely on ISDN Primary Rate Interface service for connecting PBXs and dial-up modem banks to the public network. While it’s ...

Although many enterprises are eager to adopt SIP, they see their legacy PBX systems as a roadblock to the cost savings and enhanced applications that SIP would bring. This paper outlines how to ...

PBX (Private Branch Exchange) allows you to use the same system to manage outgoing and incoming calls, plus internal communication. Learn how to leverage PBX to stay competitive. PBX phone systems use ...