I think, and I am certainly not certain as I do not remember exactly,
but I believe you get 56k on super-frame and 64k on extended super frame
and not the line coding. Please correct me if I am wrong. I believe that
super frame uses a robbed bit scheme and esf does not? I know this was
covered in BCRAN and I found it very interesting and revealing but
cannot remember the whole explanation in it's entirety.
-----Original Message-----
From: Bruce Williams [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, December 20, 2000 12:18 PM
To: [EMAIL PROTECTED]
Subject: 56K vs 64K
On a T1 line what is the difference between 56K and 64K. If I am correct
I
believe that 56K uses bit stuffing to stuff the 8th bit of every
timeslot
with a 1 to fulfill the ones density requirement. However, this would
not be
necessary with B8ZS line coding, right because B8ZS will not allow 8
consecutive zeroes anyway. Now if that is true, why would you use 56K on
a
B8ZS coded T1 circuit and if those timeslots are cross-connected to a
64K
line or vice versa, wont that cause errors because the two clock rates
are
expecting different things in the 8th bit. I would appreciate any
comments
at all on this subject.
--
Bruce Williams
[EMAIL PROTECTED]
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