Guess it's my old AT&T terminology. To me a T3 is the system, DS3 is the jack on the T3. The way I understand DS3 means the same as T3. I've never heard the term T3 used as 3 T1's, but there's lots of terms I've learned on this board different from what was used by AT&T. When we lost a T3 carrying T1's we lost 28 T1's. Now there was an older carrier that was T2 or DS2, I don't remember how many T's it carried. :confused:


Retired phone dude