I have a MICS v7.1 (30DEC12 NAT) with a Nortel door phone (BST?).
In admin, I've got call DN = 739, Rings: 5, Page zone: 3, Chime type: 1. Opener type=none.
739 is setup to ring the extensions I want it to, but when I hit the door phone button, the extensions in 739 keep ringing until it's...