January 2016
Intermediate to advanced
384 pages
8h 6m
English
book
Building Telephony Systems with OpenSIPS - Second Edition
by Flavio E. Goncalves, Flavio E Goncalves, Bogdan-Andrei Iancu
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SIP services
Beyond making and receiving calls, you can implement a series of SIP services. These services include, but are not limited to, Call Transfers, Call Pickup, Call Hold, Call Forward, and many others. Fortunately, RFC 5359 (SIP services) defines a standard way to accomplish these tasks. Most SIP phones comply with the way SIP services are implemented; however, to make them work, you need to make sure that all the components in the network support some specific RFCs. As an example, the call transfer requires the support of the REFER method defined in RFC 3515 and the Referred-By and Replaces headers defined in RFCs 3891 and 3892, respectively. If you intend to provide PBX-like services using a SIP proxy, you have to make sure that all ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.