No, put the MCK key on YOUR phone. Press the MCK key, it flashes, enter the DN of the set with the light on. The light should then go off. (You may also have to press the MCK key after entering the DN, I can't remember)
You may have a hardware problem on the NT8D09. The WLC circuits are switching 150V, this is very hi voltage. After working for a long time they tend to behave as you described.
If this is the situation you may hear noises on the problematic ports this is due to the leakage of the hi voltage into the voice circuits.
David
Thaanks. I did add the mck button and it took care of the issue, but the posts here have been very helpful expanding my knowledge of our system.
Thanks again.
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