December 2017
Intermediate to advanced
860 pages
16h 1m
English
Content preview from Metasploit Revealed: Secrets of the Expert Pentester
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An introduction to PBX
PBX is a cost-effective solution to telephony services in small and medium sized companies. This is because it provides much more flexibility and intercommunication between the company cabins and floors. A large company may also prefer PBX because connecting each telephone line to the external line becomes very cumbersome in large organizations. PBX includes the following:
- Telephone trunk lines that terminate at the PBX
- A computer that manages all the switching of calls within the PBX and in and out of it
- The network of communication lines within the PBX
- A console or switchboard for a human operator
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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.