Compatible with Avaya IP office 9400, 9500, and 9600 Series Phones. compatible with the following models: Avaya 9404, 9408, 9504, 9508, 9608, 9608G, 9610, 9611, 9611G, 9620, 9620C, 9620L, 9621 ,9621G, 9640, 9641, 9641G, 9641GS, 9650 and 9650C models.
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