By Regis "Bud" J. Bates;

Broadband telecommunications, the supply of lightning quickly web entry to the house or workplace, is a box complicated, competing applied sciences: DSL, cable, instant, optical, and plenty of extra. This booklet breaks down every one broadband know-how and explains it by way of functionality, asking Bates’ three Questions: what's it, what is going to it do for me, and what's it going to price me?

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Additional resources for Broadband Telecommunications Handbook 2nd edition 2002

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An authentication header is created for each packet. The layman's version of this is that a checksum is calculated and encrypted with the data. If the checksum calculated by the recipient doesn't match the one sent by the originator, someone has tampered with the data. The IPSec standard specifies two different algorithms for doing this MD−5 and SHA−1. If your vendor's equipment supports both algorithms, it improves the chances for intervendor compatibility. The other alternative is to simply not use packet level authentication.

An FX line is needed to each high volume calling location. Alternatively, a company could use a leased telephone line between locations. These lines went by several names: Terminal Interface Equipment (TIE) line, dedicated line, and a data line, when used for data. These are essentially point−to−point telephone lines that are available in two−wire or four−wire configurations. Because the difference in cost between two− and four−wire connections was small (relative to the cost of the line), the four−wire option was preferred unless the company needed many lines.

So all told, the customer has just dialed 37 digits to make a call. This creates frustration for the caller, especially if they make several calls during the course of a day. Let's complicate the above scenario a bit! After being frustrated by dialing all those digits, the caller gets a busy tone. This means that they have to start over. Now the frustration really starts to mount. Moreover, one may be reading this and saying "what is the author talking about? " That may be true for some calls and some phones, but this is not a guarantee.

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