94Installation/Set up Viewing • Listeningand OperationRecording Setting up OthersOthers• When very strong light strikes at the lens, you might see stripe patterns (smear) on theimages, but these are not malfunctions. If this happens, reinstall the camera in anotherplace, or try to change the direction of the lens.• Sound may not always synchronize with the camera images.Before Calling Service Personnel... (Cont.)About PoE Power Supply Function for Supplying Power via a LAN Cable• There are two PoE (Power Over Ethernet) methods: the Spare Pair method (a powersupply method that uses the unused wires) and the Signal Pair method (a power supplymethod that uses the signal wires). The camera, which is on the receiving side, supportsboth methods, but there are hubs and other power supply devices that only support oneof the methods. For details, refer to the user’s manual of the power supply device.• Be sure to use a 4 pair twisted cable for the LAN cable because power cannot be suppliedfrom the above-mentioned power supply device when some types of LAN cable are used.