I'm having some trouble w/ a T1 line that I've been troubleshooting. The link is steady (doesn't lose connectivity), but as soon as we start to pass traffic through it the data rate drops exponentially. Its like we're on an old 56k line when transferring files.
We have a cisco router w/ a serial WIC card which connects to an adtran. Then we connect through copper lines (w/ a pair gain on each end) to another building that houses the service provider equipment.
Not sure how to continue troubleshooting this, could the slow datarates be due to the pairgains / copper lines? Or could it be a configuration on the routers?
Any help is always appreciated.