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
Content preview from Building Telephony Systems with OpenSIPS - Second EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Missing BYEs and CDRs
One of the biggest issues with SIP accounting is the occurrence of missing BYEs. If one leg of a call is abruptly disconnected from the network, the BYE request is not generated. In this case, it is not possible to receive the BYE message and determine the duration of the call correctly. There are some approaches to solve this issue:
- The SIP session timers
The SIP session timers, described in RFC 4028, enhance the SIP protocol by adding the capability to refresh the SIP sessions by resending periodic re-INVITEs or UPDATEs. To implement SIP session timers, it is necessary to have support on at least one of the SIP endpoints, the client, or the gateway. The advantage of this method is that it uses only signaling without any control ...
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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.
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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.