Your buttons lost programming. You should be able to reprogram them yourself with very little trouble. Flexible button programming is in the user guide. If you don't have one you can download one from my website. You will need the Triad user guide. The Triad phone doesn't look the same but it works pretty much the same so the guide will still work.

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"Old phone guys never die, they just get locked in some closet with an old phone system and forgotten about"

Retired, taking photographs and hoping to fly one of my many kites.