User’s Manual10be the same. The default RS-485 setting is half-duplex. Please do not change thedefault setting without seeking the advice of a qualified specialist or the supplier. Pin 3and pin 4 are used for termination and line lock adjustment respectively. Pin 5 ismainly used after updating the software and changing protocol.RS-485 settingHalf-duplex Full-duplex2.4 PTZ Camera ID SettingUse the switch to change your PTZ camera ID by turning the arrow to the desirednumber. For example, if the camera ID is 123, the ID switch should be set as below.NOTE: No two cameras should be given the same ID or communicationconflict may occur.Hundreds Tens UnitsNOTE: The number “0” should be located at the top as shown in abovediagram to ensure correct switch definition.2.5 PTZ Camera Control ProtocolA protocol is a specific set of rules and procedures used for data communication.Define the protocol you are going to use based on the devices in your surveillancesystem. Generally, you should use a single protocol even if the devices are suppliedby different manufacturers. Use the switch to set your PTZ camera control protocoland the baud rate. Refer to the table below and turn the arrow to choose a protocol foryour camera.