March 2016
Intermediate to advanced
496 pages
12h 47m
English
book
Implementing Cisco IP Telephony and Video, Part 2 (CIPTV2) Foundation Learning Guide (CCNP Collaboration Exam 300-075 CIPTV2), 3rd Edition
by William Alexander Hannah, Akhil Behl
Content preview from Implementing Cisco IP Telephony and Video, Part 2 (CIPTV2) Foundation Learning Guide (CCNP Collaboration Exam 300-075 CIPTV2), 3rd EditionBecome 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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Chapter 3. Overview of PSTN and Intersite Connectivity Options
Cisco Unified Communications Manager (CUCM) multisite deployments can use a vast range of connection options to the public switched telephone network (PSTN) and various wide-area network (WAN) technologies for connections between sites. At the turn of the century, the majority of U.S.-based companies were using primary rate interface (PRI ISDN) circuits and some flavor or WAN technologies such as Frame Relay, Asynchronous Transfer Mode (ATM), T1, and so on.
Fast forward just a few short years and Session Initiation Protocol (SIP) adoption has grown multifold, so have alternative WAN technologies that offer high-speed WAN connections between sites. With the increase in WAN speed, many ...
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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.