I have a T7316 and when it is hooked up i can get calls, but non of the buttons do anything. intercom, feature, just makes the noise but no response. If I hook up a t7208 it works fine. I have tried 2 7316..same issue. Any thoughts?
I agree with drtelephone - classic case of a stuck button. Pull up and wiggle on all buttons. If you can receive calls but do nothing else, stuck button.
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