August 2001
Beginner
304 pages
10h 3m
English
Content preview from T1: A Survival GuideBecome 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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CSU/DSU Configuration
CSU/DSU configuration can be a frustrating affair for many reasons. Each vendor has a slightly different way of describing features, and terms in the manual may differ from the terms your telco uses. In many cases, your service provider or telco will include a CSU/DSU in the startup charges for a new line and will even pre-configure the CSU/DSU to work with the new line. Depending on the model, configuration can be frustrating. Some CSU/DSUs are configured with jumpers or DIP switches, and the cheapest ones even require a power-cycle to reread the jumper or switch settings. Higher-end CSU/DSUs have menu-driven configuration and are far easier to use.
While the array of configuration options may be bewildering, the following options are critically important and account for most of the problems you may see:
- Framing
The choice is between SF and ESF, and the former is rare and getting rarer. This setting is supplied by the telco because it must match the telco equipment.
- Line code/DS0 channel speed
These two settings are related. AMI encoding is almost always associated with 56k component DS0 channels, and B8ZS is always associated with 64k component DS0s. Depending on your CSU/DSU, configuration may be required for both line code and DS0 speed or just one of the two. Like framing, these settings are supplied by the telco.
- Line build out
By the time a pulse reaches a T1 repeater, it is assumed that a certain amount of attenuation will have already occurred. T1 uses ...
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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.