C-500 | 2 Door Entry System Controller | Telephone Entry System | Viking

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Two Door Entry Phone Controller with Call Forwarding and Door Strike Controls

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Product Details

The C-500 allows single line telephones or a telephone entry 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 door 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 phones with user programmable entry phone “Caller ID”. Tenants may also call the door entry phones for monitoring purposes or enter touch tone commands to activate, deactivate or toggle the door strike/gate relays.

The C-500 telephone entry system controller allows up to 6 permanent keyless entry codes, 2 “one time use” entry codes and 1 toggle entry code for each door. The C-500 provides optional entry phone distinctive ring, two trigger inputs for “Request to Exit” and field programmable Caller ID or beep tones when answered to indicate which door is activated.


  • Add one or two (expandable to 8) entry phones to your standard home or office phones to provide:
    • Door communication
    • Gate Entry
    • Door entry
    • Keyless Entry
  • Provide commercial or residential security via two-way handsfree communication at the door and gate
  • Connects in series with a single phone line, phone system analog station port or unused line input (loop start trunk input)
  • High security building entry systems
  • Door strikes and gates in conjunction with entry phones or hot-line / panel phones




  • 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
  • Built-in five number call forwarding dialer (if inside phone doesn’t answer), detects busy or ring no answer and goes on to the next number
  • Provide entry phone activated chimes and whole house paging when used with a Viking SLP-1 or SLP-4
  • Analog Station Mode allows entry phones to connect to analog PABX station
  • Two SPDT 5A door strike relays with 1 or 2 digit activation commands
  • Monitor any entry phone
  • Up to 6 different keyless entry codes, 2 “one time use” keyless entry codes, and 1 keyless toggle code per entrance
  • Auto answer for remote programming, relay control and monitoring
  • Two trigger inputs for Request to Exit (REX), immediate call forwarding or lighted doorbell switches to activate entry phone calls
  • Produces “Call Waiting” tones if the entry phone is activated when the house phones are on a call
  • Compatible with all Viking E-Series and K-Series analog entry phones, or use with any analog touch tone phone


  • Power: 120VAC / 13.8VAC 1.25A UL listed adapter provided
  • Dimensions: 5.25″ x 4.1″ x 1.75″ (133mm x 104mm x 44mm)
  • Shipping Weight: 2 lbs (0.9 kg)
  • Operating Temperature: 32°F to 90°F (0°C to 32°C)
  • Humidity: 5% to 95% non-condensing
  • SPDT Relay Contact Rating: 5A @ 30VDC / 5A @ 125VAC, 300VAC maximum
  • Ring Output: 5 REN, capable of ringing (10) 0.5 REN phones
  • Talk Battery: 44VDC
  • Connections: (19) cage clamp screw terminals