May 2018
Intermediate to advanced
492 pages
10h 54m
English
Content preview from Mastering Metasploit - Third Edition
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An introduction to PBX
PBX is a cost-effective solution to telephony services in small and medium-sized companies 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 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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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.