MITEL IR-9001019 1 Zone Door Answering Unit With Lock Relay - MITEL IR-9001019

The Door Answering Unit provides voice contact from a designated telephone station to a door. When used in conjunction with a door plate speaker, pressing the pushbutton on the door plate speaker will cause die phone to ring (1 second on. 4 seconds off).By answering the call, the with the person at die door call the door speaker). system user can converse.The can be used with a dedicated single line telephone set, a loop start trunk port of a PABXorC.0. Line Position of an E-Key System.