Originally Posted by mj_wald
When we look at the span it is running 4 hz fast and drifts to 5 hz, then back to 4. The telco tech says this is normal?
Doesn't the span need to be exactly 1.544MHz? Not +4 or 5?

A T1 does NOT need to be ANYTHING Hertz. ... That’s an analog measurement.
A T1/DS1 will be 1.544 Megabits per second though. ... Any more, any less, you’ll have a T1 that’s going hard down.
As Just Bill mentioned if what you’re seeing is truly “slips” it’s a clocking problem. What are you sinking off of?


Originally Posted by mj_wald
The Telco tech the CO clocks off GPS?
Oh, best part, the CO is a old Stromberg Carlson!

Yes, bits clocks can and do run off satellite links.

STROMBERG CARLSON!!?!?! Whoa… But is this a PRI we’re talking about? Otherwise the local switcher shouldn’t matter.

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Bryan
LEC Provisioning Engineer
Cars -n- Guitars Racin' (retired racer Oct.'07)