Mitel SX-2000 Main Controller 2 Card (MC211AA)

Mitel SX2000 Main Controller Card II (MC211AA) The Mitel SX2000 Main Controller Card II 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!