Voice-over-IP (VoIP) networking comprises many components and network managers might find themselves treading on new and fragile ground as they investigate VoIP projects. This white paper provides an ...

The iptel.org 180+ page SIP tutorial is outstanding. Another overview that is a bit more market-oriented and nearly as long. White paper on the SIP value proposition over telephony, SIP and the new ...

Avaya has launched phones and software that it claims will make it easier to intelligently route calls in businesses and call centres. On Monday, the communications firm announced the release of ...

Avaya has launched phones and software that it claims will make it easier to intelligently route calls in businesses and call centres. On Monday, the communications firm announced the release of ...

Cisco Systems Inc.’s update to its CallManager IP PBX — introduced this week with native Session Initiation Protocol (SIP) support — will require broader ...

On either side of that somewhat soft SIP trunk demarc, security continues to be important, and it's still a matter of contention on who's willing to pay for what services. In case you don't know him, ...

The two-way transmission of voice over a packet-switched IP network, which is part of the TCP/IP protocol suite. The terms "IP telephony" and "voice over IP" (VoIP) are synonymous. However, the term ...

Don't know if this is the right forum for a VoIP config. question using a Windows app. If it isn't, my apologies and feel free to move it. I'm helping a friend to configure Express Talk softclient for ...