Question : Using Cisco 2600 Routers with Point-to-Point T1's & now changing T1 circuit providers, but new circuits don't work w/routers... HELP!

We're attempting to migrate our _point-point_ T1 circuits from AT&T (SBC) to Telepacific to save lots of money.  The Telepacific T1's use the same framing as the AT&T circuits.  When we unplug the Cisco 2600 routers at both ends from the AT&T (old) point-to-point T1's and plug them into the Telepacific T1's, the alarm lights on each of the routers never turn off, even after rebooting both sides and waiting about 5 minutes.  We unplug the new T1's and connect the routers back into the old T1's and about 30 seconds later the orange alarm lights on the routers turn off at both ends and connectivity is restored.

Any ideas why this would be?  I can understand if it were going through a frame cloud, but they're point-point circuits.  Isn't a matter of plug and play in this case?

We're extremely under the gun and past due with this project, so that's why I need an answer fast and it's worth 500 points.  Thanks!

Answer : Using Cisco 2600 Routers with Point-to-Point T1's & now changing T1 circuit providers, but new circuits don't work w/routers... HELP!

What does Telepacific see on the T1?  Can they see either side?

I a bit confused, you state that the framing is set to B8ZS/ESF on the router, but on your S0/1 config it is not there.  Did you only post part of the configuration?

If the alarm light does not go out, then either the framing is wrong, the signal is too weak, or there is no actual circut between you and the telco.

What was the LBO on the old circut?

What is the LBO on the new circut?