Mitel SX-2000 Main Controller 3R Card (MC215AA)

Mitel SX2000 Main Controller Card III R (MC215AA) The Mitel SX2000 Main Controller Card III R connects the telephone's receive path to a circuit carrying dial tone and the transmit path to a DTMF receiver circuit when the phone goes off the hook. Features Connects the phone's receive path to a dial tone circuit when off-hook Connects the phone's transmit path to a DTMF receiver circuit when off-hook One year warranty included, with extended warranties available!