... -tail; interlocking; multi-card unlocking; emergency double locking; in door population checking; unlocking based on internal and external validation.All ... port communication line, software, manual, certificate, key(2pcs), cartonAlarm for long time door open, ilegal break in, intimidateYesFire and alarm linkageIf no ... 4 Doors Access controller Board picture show: TCP/IP access door panel for 4 doors