This versatile device allows single-line phones or phone systems to share a phone line "port" with one or two Viking door intercom speakers.
	
Provides two Touchtone-controlled relays to operate door strikes or gate openers and provides TV camera switching controlled by door intercom box.
	
Switch between two CCTV cameras when either door intercom is activated
	
Also works as a line concentrator—one fax machine or answering machine can answer 3 lines
	
Doorbox triggered CCTV switching
	
Custom ringing mode allows you to distinguish doorbox calls from outside calls
	
Calls can be placed on hold when visitors call from the door or when paging
	
Call-waiting tones indicate which door speaker is calling and distinguish a door call from an outside call
	
Provides two Touchtone-controlled NO or NC dry contact closures (5 amp rating) for door strikes or gate openers
	
Keyless entry/postal lock input
	
Built-in talk battery for "no CO line" applications
	
Auxiliary contact output for doorbells, lights, etc.
	
Requires AC power.
	
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