Session Initiation Protocol (SIP), with its promise of serving as a single global signaling standard, has mushroomed in importance for networking in the past year. But it may be years from adoption ...

This is one in a series of articles from the ebook “The Real World of AoIP.” Radio World asked several manufacturers to identify the most important technical development or trend in the use of AoIP.

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 ...

This article originally appeared in the July 2013 issue of SD&I magazine. The “network-everywhere” methodology has infiltrated our lives and most of us are attempting to negotiate a network connection ...

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, ...

Update: We're in the last throes of winter break 2019, which means most Ars' home office phones can stay dormant for a few more days. As such, we've been resurfacing a few classics from the ...

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 ...

SIP is a protocol similar to HTTP that merely defines how two end-points find one another and exchange the information necessary to establish a session. But SIP, like HTTP, leaves the specifics of the ...

Before kissing TDM voice goodbye, make sure sellers keep their pricing and performance promises, and that you don't put your network or its economics at risk. Here's how. SIP trunking (VoIP based on ...

In this chapter, we start putting into practice some of the SIP concepts learned so far. We will show some very simple programming examples that illustrate how SIP works. As was stated in previous ...

Last time I gave a high level overview of SIP and also took a look at SIP network element types. This time, I’ll be looking at SIP message and method types, and describing how SIP network elements ...

Can the Army transition to an IP-based voice architecture? Lessons learned when Fort Leonard Wood went to an all-IP phone system will help. In a complex world, sometimes old questions require new ...