My meridian m2250 is stuck on busy. How do I get it back to idle

SOURCE: meridian console m2250

THE HANDSET IS PLUGGED IN UPSIDE DOWN

SOURCE: My Nortel MERIDIAN M2250 CONSOLE

Hello.

There could be faulty equipment or a bent cable.

First, disconnect the power to the attendant and then reconnect.

If still a problem, observe and note where all the cables are specifically connected to the console. Disconnect all the cables and connect one at a time to see if the noise returns. If you hear the noise with a certain connection, you'll narrow where the problem lies.

Hope this helps.