- Viking door entry/ CCTV controller- Allows single line phones or phone systems to share a phone line with one or two Viking doorboxes or paging amplifiers- Provides two Touch Tone controlled relays to operate door strikes or gate openers and provides doorbox triggered CCTV camera switching- Switch between two CCTV cameras when either doorbox is activated- Handy 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 CO calls- Compatible with up to two of the following: W-1000 W-2000A or W-3000- Calls can be placed on hold when visitors call from the doorbox or when paging- Call waiting tones indicate which doorbox is calling and distinguish a doorbox call from a CO line call- Provides two Touch Tone 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.VKC1000B