DS3 = T3??

[josiane.roussy]

DS3 = 44.736 Mbps

DS3 = T3

What is the différence between DS3 and T3? DSX and TX are synonym? If yes, why they have 2 term for the same thing!?

P.S. Sorry for my english.

[Marvin Rhoads]

The terms are often interchangeably and inprecisely used. The best way I can explain it is that a DS-3 (or DS-x for different data transmission rates) is a digital signal datastream format (i.e., the bits on the wire or fiber optics). Once it crosses a demarcation point (or demarc) it is referred to more in terms of its electrical and mechanical characteristics (of the connector, that is, in the latter case) and is more commonly referred to as a T-3.

[josiane.roussy]

Then if I understands well. DS-X is the logical data transmission rates and TX is the physical definition of the DS-X. The DS3 is 44.736 Mbps and the T3 is the 672 channels that can permit 44.736 Mbps ?!

[Keyan]

Here is how I understand it-

A DS-3 is a Digial Subscriber line at 44.736mbps. The medium can be anything - copper, fiber, etc, the term DS-3 just denotes the speed. A true T-3 is 672 copper lines at 64kbps bundled together to get 44.736 mpbs. True T-3s are actually pretty rare now as far as running into an end consumer, most companies will get a fiber installation and then get a DS-3 over it instead of having a huge bundle of copper in their data centers.