Thanks to all of you who have responded. Here's where I'm at:

The Telco's (two telcos involved) have both said the circuit is sound and
correct. We can loopback both ways down the length of the circuit and it
works ok. To eliminate hardware problems on my end, I have tested this
router and DSU on the T1 in my office. It is a point to point to our ISP.
The router came up, I plugged in our IP's, NAT, ACL info and we were
surfing. My hardware/configuration seems to be working ok. The only thing
left is their hardware/configuration, so I feel that's where the problem
lies. The company I am trying to connect to has over 50 T1's going into
their facility - this is not exactly a new configuration for them.

Admittedly I am not the most seasoned field person. I have installed some
T1's, but not 100's. I feel I must be missing something simple, but I don't
what it is. The default configuration for this DSU is:

clock source - line
encoding - b8za
framing - esf
timeslots/channels - all 24
speed - 64k

I have not modified any of these settings execpt changing the clock source,
trying it both ways. In our office I know the ISP is providing the timing,
so I just left everyting on the DSU to default and it worked beautifully.

Any other ideas?

Thanks,
Stephen




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