ADSL Termination Unit-Central Office. A piece of hardware located in a
DSLAM (
Digital Subscriber Line ATM Multiplexor) at your local
CO. It lies between an
ADSL user's line and the switches in the
PSTN.
This piece of
hardware is responsible for taking the
line that goes from your
home and connecting it to the
DSL Provider's network. What this means to a
user is if it gets
broken then you're in
bad shape because you can't travel any farther then that into the network.