SIP: Understanding the Session Initiation Protocol Alan B. Johnston
Publisher: artech-house

A session could be a simple two-way telephone call or it could be a collaborative multi-media conference session. If you have to dial a 1 or a 9 before you make a phone call, you might as well be using smoke signals to communicate. DCF has also eliminated more than 20 percent of all the landline phones in the department and is taking advantage of Session Initiation Protocol (SIP) telephone technology. And that's what you'll find below: an explanation of what SIP trunking At its most basic level, a SIP (Session Initiation Protocol) trunk acts as a connection between your company and your Internet telephony provider or ITSP (Internet Telephony Service Provider). It enables the delivery of instant messages and the ability of video or voice conferences between unlimited employees via the open Session Initiation Protocols suites SIP. This addition of SIP support opens up a whole new world of voice possibilities. Publisher, Artech House Publishers; 1st edition. At its core IMS uses the Session Initiation Protocol (SIP) for session management, though many compulsory SIP extensions are required to ensure security and reliability. But you need to understand it, especially if your organization or company is at all involved with the Internet (which nearly every is these days). Book title, SIP - Understanding the Session Initiation Protocol. SIP, which stands for Session Initiated Protocol, unifies both voice and video over standard IP-based networks. The objective with this study is to describe security mechanisms that are integrated or are proposed to be integrated with the Session Initiation Protocol (SIP). To understand what SIP Trunking is and why you should care about it, we have to first understand where your voice networks and your data networks are today. The Session Initiation Protocol (SIP) is a signalling protocol used for establishing sessions in an IP network. Session Initiation Protocol (SIP) is a standard designed by the Internet Engineering Task Force (IETF) to serve VoIP services.