DoorKing 1877-010 Telephone Line Surge Suppressor sprocket Always consult your operator’s manual

Always consult your operator’s manual to confirm compatibility

Motor Power: 220 W

1834 Series: 1834-084

this arm delivers powerful

Lock Output: Maglock support through NC and COM terminals

DoorKing 1877-010 Telephone Line Surge Suppressor sprocket Always consult your operator’s manualTelephone Line Surge Suppressor for DoorKing Systems The DoorKing 1877 010 Telephone Line Surge Suppressor provides critical protection against voltage spikes and surges that can damage telephone entry and access control systems. Designed for use with DoorKing telephone based controllers, it safeguards communication lines by filtering and grounding transient surges caused by lightning or power fluctuations. Key Features Genuine DoorKing surge