8 call-down features / commands, 1 call-down feature on / off – system wide, 2 set doorman to enable / disable direct connect – DoorKing 1820 Telephone Intercom User Manual
8 call-down features / commands, 1 call-down feature on / off – system wide, 2 set doorman to enable / disable direct connect | DoorKing 1820 Telephone Intercom User Manual | Page 44 / 63
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