July 2017
Intermediate to advanced
434 pages
12h 59m
English
Content preview from FreeSWITCH 1.8
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Call legs (channels)
Each industry has its own parlance and magic words. In telecommunication, whatever the underlying technology (SIP, WebRTC, TDM, etc), you will very often read about call "legs" and "channels".
First confusing fact: each "call leg" is actually a call in its own right. That is: a call is often said to be made by an "A-leg" and a "B-leg". In fact, "A-leg" and "B-leg" are proper calls.
Second confusing fact: each leg is a channel. So, most of the "calls" are consisting of two channels(A-leg and B-leg), while some (to IVRs, voicemail, and the like) are consisting of one only channel (A-leg).
The reason for this funny terminology is the fact that when people talk about "a call", they usually mean an end-to-end voice or video ...
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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.