61.5 Communicating via the Optical In-terface■ Optical Communications with the BHT-6000The BHT-6000 communicates using an IR beam, so make sure that there is no obstruc-tion in the light path between the BHT-6000 and any target stations.In the IrDA communications mode, you need to keep the BHT-6000 and any targetstations within the effective light emission range, usually 10 to 80 cm.■ Communicating with the CU-6000The optional CU-6000 is an IrDA-compliant communications unit. For optical commu-nications, you may either keep the BHT-6000 and CU-6000 separated by 10 to 80 cmwith their IR ports facing each other, or put the BHT-6000 directly on the CU-6000 asshown below.■ Communicating with other IrDA-compliant equipmentYou can also have the BHT-6000 communicate with other IrDA-compliant equipmentjust by aligning their IR ports with each other. The effective IR range and IR port anglemay differ depending upon the target equipment, so observe the instructions given inmanuals furnished with such equipment.If transfer using the BHT-6000 fails, bring it closer to the target station or change the IRport angle, and try again.Communications failures might be caused by highly intensive light emitted fromceiling (inverter-driven fluorescent) lamps or direct sunlight. Take care to preventsuch interference light from coming into the IR ports of the BHT-6000 and IrDA-compliant equipment, including the CU-6000.Do not use any TV remote control in the vicinity of the IR communications system.Doing so may interfere with the communications.NOTENOTE