June 2019
Beginner to intermediate
660 pages
14h 30m
English
Content preview from The Complete Metasploit Guide
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Hosted services
In the hosted services-type VOIP technology, there is no PBX at the client's premises. However, all the devices at the client's premises are connected to the PBX of the service provider via the internet, that is, via Session Initiation Protocol (SIP) lines using IP/VPN technologies.
Let's see how this technology works with the help of the following diagram:
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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.