I'm looking for some feedback to a discussion I had with a co-worker. I'm
not looking for troubleshooting assistance with this problem. Rather, I
would like to know if anyone else has experienced a similar situation in
which a utilization problem looks like a physical problem?

We had a customer with a 56k Frame ckt terminating into a Cisco 2524 with an
integrated 4-wire CSU/DSU. The end user was complaining of dropping when
trying to pull large files (3 meg).
The interface stats showed Input errors, CRCs and carrier transitions.
Myself and the telco were able to test end-to-end clean several times. We
then swapped the 2524 for fear that the integrated CSU/DSU was flaky. The
problem remained.

Then my co-worker made a statement that I am having a hard time agreeing
with. He stated that it must be heavy utilization by the end user that is
causing the problem. Could that be? A utilization problem that looks like a
physical problem according to the stats provided by the serial interface?

It's always fun to banter with co-workers. Round-table discussions in front
of the whiteboard are my favorite part of the job.

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