DoorKing 1812 Plus Manuals & Support

The DoorKing 1812 Plus is a residential telephone intercom that uses the home phone line. Visitors call the house, and the resident talks to them and opens the gate from any touch-tone phone.

It has call forward, up to 27 dial-out numbers, a distinctive ring, answering machine bypass and two relays for a main gate and a pedestrian gate.

Identify your model

The 1812 Plus uses the 1971-010 control board. Use the manual for board 1971-010 Rev U or higher. It comes in surface, curved surface, wall and flush mount cabinets.

If your unit has a network jack, see the 1812 Access Plus. If it runs on 24 VAC, see the 1812 Classic.

Key specs

Power	16.5 VAC, 20 VA transformer (DoorKing 1801-008); do not use 24 VAC
Phone line	Uses the existing home line
Relays	2 (main gate and pedestrian gate)
Access codes	Up to 50
Dial-out numbers	Up to 27, plus call forward
Programming	Keypad or touch-tone phone
Board	1971-010 Rev U or higher
Backup	12 VDC battery terminals

Manuals and documents

Troubleshooting

Most reported problems are programming settings and can be fixed on site. Check power first, then the phone wiring.

Keypad dead or OV LED on

The board needs 16.5 VAC. Check the transformer output at the power terminals.
An OV (over voltage) LED means the input is too high. The 1812 Plus and Access Plus run on 16.5 VAC only. Do not use 24 VAC.
Check that the keypad plug is seated with the cable pointing down.

Buzz or noise on the line

Check that all phone wires are twisted pair and rated for outdoor or burial use.
Check for pinched wires near the door hinge and for a short to ground behind the circuit board.
Check that the cabinet is grounded. Do not use the case ground terminal as a low voltage common.
Remove the 16 VAC (or 24 VAC on the Classic) wires and listen to the house phones. If the noise goes away, the power wires are grounded.

Dial tone on the 1812 speaker or no tone from the phones

The 1812 must be wired in series with the house phone line. Check PHONE IN (terminals 1 and 2) and PHONE OUT (terminals 4 and 5).
If the house phones do not make a tone to open the gate, swap the PHONE OUT wires.

House phones do not ring

Check that the by-pass switch is set to ENTRY, not BY-PASS.
Turn off Do Not Disturb or call forward, or change their time zone boundaries.
Connect a test phone to PHONE OUT. If it rings, the problem is in the house phone wiring.

Gate or strike stays open

Check for a hold open time zone or a hold open code.
Check for voltage drop on the power wires.
A hold command may have been sent from a house phone. Send the release command from the phone.

Common questions

No. It connects to the home phone line. Calls from the gate ring with a distinctive ring, and the resident presses 9 to open the gate.

All phone wires pass through the by-pass board. If the 1812 needs service, the homeowner flips the switch to BY-PASS and the phone line goes straight to the house.

Mount any keypad or entry system at least 6 ft from a gate or gate operator, or where the user cannot reach the gate while using it.

Up to 50 access codes, including simple codes and time zone restricted codes.