> If you have 2 CSU/DSU's set to either both provide or both receive
> timing, you will see slips as a result of the 2 closck fighting each
> other. The quality of the clock determines how many slips in a certain
> time period you could expect to receive. For instance a stratum 2 clock
> is more stable (less slips) than a stratum 3.
The thing is, BellSouth has recently told me (I don't know how true it
is...but it came from a troubleshooter at the local CO) that they never
provide clock on PTP T1's. I have a T1 customer who (if this is true) has
been misconfigured with both CSU/DSU's set to get clock from the loop for
a year with no problems...until yesterday when the Pairgain at their end
of the circuit fried. I assume that's totally unrelated. I've set the
CSU/DSU at my end of their T1 to internal/master clock, and the line seems
just as stable.
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