July 2017
Intermediate to advanced
434 pages
12h 59m
English
Content preview from FreeSWITCH 1.8
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Enabling SRTP
You can enable SRTP from your Dialplan on a per-call basis by setting the following flag:
<action application="set" data="sip_secure_media=true"/>
This needs to be done on both legs and on both inbound and outbound calls to be fully effective. Of course, the ITSP that provide you gateway to PSTN will probably not support SRTP so you may only be able to enable this on legs from FreeSWITCH to the endpoint(s).
You can check if media is secured properly by checking for the variable ${sip_secure_media_confirmed} to be set. As an example, the following block will play a bong tone when SIP media is secured:
<extension name="is_secure"> <condition field="${sip_secure_media_confirmed}" expression="^true$"> <action application="sleep" ...Become 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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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.