21.2.2 F0610 Multi-Function CardItem DescriptionCapacity of Analog Phone/Door Phone 2 LoopsResistance of Loop 600 ΩRS232 1 LoopAudio Input 1 LoopPage Output 1 LoopProgrammable Control Switch 1 Loop 2 wires, Max. 30V/0.5AElectric Lock (Power & Open-sensor included) 2 Loop 3 wires1.2.3 F0658 DSP CardItem DescriptionLoop of Caller-ID 6 Loops Dual-ModeDetection Mode of Caller-ID FSK and DTMFLoop of DISA 6 LoopsSupport Languages 4 LanguagesVoice Capacity 3,600 Sec.Recordable On-hold music 6 songs1.2.4 Doorphone Voice CardItem DescriptionDoor phone Interface 600Ω , 1 Loop 2 wires〜4 wires (3 groups)Electric Lock (Power & Open-sensor included) 1 Loop 3 wires1.3 KSU Installation Instructions1.3.1 ISDK-616 KSU installation steps:1.3.1.1 To turn the AC Power or battery switch to “OFF”1.3.1.2 Make sure the power supply is 100V or 260V or else please install the constant voltageregulator if the voltage exceed the voltage range.1.3.1.3 To install the external battery.1.3.1.4 To turn the AC power switch to "ON" position. After MPU making initial setting forevery interface, the LED of MPU will be blinking simultaneously with the LED ofevery port.1.3.1.4 To turn the battery switch to "ON" position, the brightness of indicator will bechanged by charging status.Remark: Please clear all the programming data on first usage.