Valcom 4 zone CPA talkback with lock release (V-2904)
	Connects to a phone system line port and can control up to four zones, each of which can be a public address zone (one-way or talkback) or a door intercom/lock release system A Valcom doorplate speaker is used at the door. When the button is pressed, selected phones are made to ring or an alert tone over the public address can be produced using the inexpensive Valcom multi-tone generator. Up to 40 Valcom speakers can be connected to each public address zone, two of which can be talkback speakers. NB If only 2 doors are required to be answered, the remaining zones can be used for zone paging.