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WHAT IS channelized ds3?

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Anonymous

15y ago
Updated: 8/17/2019

A channelized DS3 is also a DS3 Hub.

Details can be found here.

http://techblog.intelletrace.com/what-is-a-ds3-hub/

Summary:

A Channelized DS3 supports up to 28 DS1's using M13.

Originally, DS3's were used for aggregating T1s. Imagine 28 T1s, all terminating at a CO, but originating at 28 different locations at varying distances from the CO. Because the T1s are not related, they may be out of sync with each other. The original designers knew that this was a probability, so they designed the first stage of the multiplexing process to deal with the problem.

The speed of a T1 is generally reported as 1.544 Mbps. If you multiply 1.544 Mbps * 4, you get 6.176 Mbps. Why, then, is a DS2, which is four T1s, shown as 6.312 Mbps? To compensate for T1s that are not delivering bits in a timely manner (+/- 77 Hz), the M12 multiplexer stuffs bits into the signal to get them up to speed with the other T1s in the group.

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Wiki User

15y ago

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