Viking C-500 2-Door Entry Phone Controller With Call Forwarding

Allows single line telephones or a telephone system to share a phone line with two Viking entry phones Distinctive ringing, programmable entry phone Caller ID or beep tones allow you to distinguish front and back door entry calls from CO calls Stackable - connect up to four C-500 controllers to control up to eight entry points The C-500 allows single line telephones or a telephone system to share a phone line with two Viking entry phones. Up to four C-500's can also be connected in series allowing control of up to eight entry phones and / or door strikes. Tenants may answer an entry phone call, converse with the visitor and let them in with a touch tone command which activates one of two relays to control a gate or door strike. The C-500 also has a built-in five number dialer to call your cell phone or an outside line if there is no answer on the inside phone. If the outside call is busy or ring no answer, the C-500 can call up to four more numbers. The C-500 provides the house p