Last Saturday night we had a T-1 go down. About 2:30 a.m. the AT&T tech got it back up, but as he was leaving we found out that he had converted the circuit from a 4-Wire T-1 to a 2-Wire T-1. About 5 years ago we had problems with the 2-wire circuits and made sure all our loops were a true 4-wire. We're now having trouble getting the carrier to switch the loop back.
I'd like to get some input from our T-1 gurus about this. I plan on setting up a large simultaneous upload and download sometime this week to see how it handles the transfer.
