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Mitel SX200, SX2000, and older SX platforms / Re: Cannot get Anolog Lines off of locked out

« on: February 26, 2016, 06:08:31 AM »

As per my experience you should break down the line with a test set or jack on a piece of jumper wire with a known good phone connected, check the output of the system with the station cable or jumper removed to verify the system is sending out dial tone.
If this failed in-service, then assuming the environment hasn't changed in some way, the most likely cause is a bad station card.