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Session initiation protocol (SIP)-based voice-over-IP (VoIP) designs certainly provide some interesting benefits over today's Class 5 switching systems. SIP enables capabilities like presence, instant ...

Editor’s Note: The following article is a bit of a departure from the usual “deep tech” topical treatments that are the norm for these pages. VoIP technology, while not exactly new, is just now ...

Session Initiation Protocol (SIP) will allow true interoperability, eventually enabling every IP-based device and application to communicate seamlessly with one another. This guide discusses some of ...

In our last VoIP installment, we looked at the main reasons why SIP has become a widely adopted protocol, but we left details of the protocol’s inner workings fairly vague. This article will drill ...

Viking Electronics, a designer and manufacturer of communication and security products, releases the SR-IP, a Voice-over-IP SIP loud ringer and visual indication device, complete with four traditional ...