I'm with hbiss on this one. You can use a traditional buttset to verify connections and so on but as far as a buttset that will operate as in this case a Mitel digital, I don't think that is gonna happen. But if anyone is gonna know for sure it'll be them guys over in the Mitel zone. Put a post up in their category and you'll get much more reliable info than from me. But I'm doin my best.