Doorking 1820 multi-line telephone intercom system

• Make: Doorking
• Model code: 1820
• Type of Kit/ System: Keypad & Audio
• No of User Codes: 1200
• Operating Temperature ^oC: -12 ~ +62 C (10 ~ 145 F)

Resident call down feature. Caller ID. Resident activated/deactivated call waiting. Resident activated/deactivated do-not-disturb. Resident activated/deactivated call forwarding. True full duplex communication. Interfaces with all DKS telephone entry/access control systems. Residents do not need central office (C.O.) telephone service to be connected to system. Directory codes can be programmed to numbers of your choice. No reprogramming required when residents move in or out. Double ring feature identifies lobby panel call.