July 2017
Intermediate to advanced
434 pages
12h 59m
English
Content preview from FreeSWITCH 1.8
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VLANs
VLANs are a fantastic way to isolate phones from data communications on your local network and if done correctly, they can improve call quality while preventing malicious activity.
You don't want data traffic on your local LAN (someone copying a movie, or taking a backup) to hog the bandwidth shared with phones and impair the quality of voice/video calls.
VLANs are often overlooked as optional but in fact, a lot of damage can be done by having phones on the same network as computers. It is simple to identify the IP address of a device and log in to it when they are on the same network. From there, it is trivial to lift the SIP username and passwords of many phones. For example, if you log in to an old Polycom phone, you can export the ...
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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.