Pls Help Diagnose Router Errors

I've had users at a remote site complaining for a week about their
connectivity. I have resent all my equipment to no avail. Looking at the
serial interface indicated something bad is going on, but I'm not sure what
it is. Does anyone have any ideas what might cause this?

Thanks

Serial0 is up, line protocol is up
Hardware is PowerQUICC Serial
Internet address is a.b.c.d/29
MTU 1500 ..
Telecom, Cabling and VoIP continues...
Tags: Telecom VoIP Networking Internet cat6