September 2001
Beginner
528 pages
14h 14m
English
Content preview from Essential Guide to Telecommunications, The, Third 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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Dedicated Services
Dedicated services, also known as private lines, are similar to having two tin cans and a string between sites. The “string” and “tin cans” are for the exclusive use of the organization that leases them. The “string” portion is the medium over which the voice or data transmission is sent. The medium is generally copper, microwave or fiber optics. The “tin cans” are the devices, such as a telephone, modem or digital modem, that enables sites to transmit data, voice or video between locations.
The advent of the Internet has decreased commercial organizations' use of private lines. Organizations no longer need costly dedicated paths between sites to transmit corporate files and email. Many of them now use the public Internet or ...
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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.
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.