Avaya and Nokia have launched a dual-mode softphone client for Eseries handsets. The Avaya one-X Mobile Dual Mode Edition allows a user to connect through their office-based Avaya PBX from an Eseries ...

In Part 1 of our SIP primer, I covered the SIP foundation layers starting from the message structure and ending with the SIP transactions. We saw how phone registrations and proxies could work using ...

Switzerland-based O-FONE (not to be confused with Microsoft’s oPhone) has released a SIP VoIP client for Symbian’s S60 platform. Perhaps more interesting than the client itself is their claim that ...

I have a question for all you No Jitter readers: What is SIP used for? If you are like most people in the communications industry, you will tell me that SIP is used to make telephone calls. Some of ...

From a carrier's perspective, the turn to packetized voice has been touted as providing voice calls “too cheap to meter,” irrespective of the distance between caller and call recipient. The advent of ...

Session Initiation Protocol (SIP) is a control (signaling) protocol developed by the Internet Engineering Task Force (IETF) to manage interactive multimedia IP sessions including IP telephony, ...

A new Barix SIP Zone Paging firmware update was announced at ISE 2018. The Session Initiation Protocol (SIP)-based based firmware update integrates audio and paging capabilities with IP-based ...

Session Initiation Protocol, or SIP, has been hailed as the key to the convergence kingdom, the global signaling standard that will enable all switches, gateways and phones — hard and soft — to talk ...

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 ...