T1, PRI question - 04/06/09 02:36 PM
Hey guys-
We have been talking about T1, PRI, and BRI in my Business Data Communications and Networking class and I have some questions.
I was always told that a T1 line is 24 channels of 64K. Doing the math this only adds up to 1.536 Mbps, however we always say a T1 is 1.544 mbps. This leaves an extra 8 bits. Is this for signaling?
Along the same lines, a PRI uses 23 channels of 64K for data plus 1 64K channel for signaling. Again, what is the extra 8 bits for? I understand that on a BRI you have two 64K channel and then 16K for signaling.
Hoping someone can enlighten me with the answers
Thanks!
Jeff
We have been talking about T1, PRI, and BRI in my Business Data Communications and Networking class and I have some questions.
I was always told that a T1 line is 24 channels of 64K. Doing the math this only adds up to 1.536 Mbps, however we always say a T1 is 1.544 mbps. This leaves an extra 8 bits. Is this for signaling?
Along the same lines, a PRI uses 23 channels of 64K for data plus 1 64K channel for signaling. Again, what is the extra 8 bits for? I understand that on a BRI you have two 64K channel and then 16K for signaling.
Hoping someone can enlighten me with the answers
Thanks!
Jeff