will this help
In order to allow programming of extra keys on a M3904 or M3905 telephone the prompt KBA must be set to 1 or 2 (if 2 AOM's are attached).
It is also possible to add a Display-based Accessory via the DBA prompt which should be set to 1.
Please note that DBA and KBA are mutually exclusive
No, I just spent about an hour replacing a M2616 becasue certain models(NT #'s) do not work with the AOM's. I guess three's a charm becasue it was the third phone I replaced it with wound up working.
All the 2616 work with the AOM's the problem that you ran into was an older 2616. They need a power board inside the phone with an external power supply to work the AOM (and 6 conductor line cord). I don't have the NT numbers in front of me right now, but a good rule of thumb is if the Handset & Line cord jacks on the phone are facing the same direction then you probably don't need external power.
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