Low speed PLC : 60 bps - several hundred bps   Middle speed PLC : 2.4Kbps-19.2Kbps   High speed PLC : above 1Mbps   Middle/Low speed PLC : 10Khz-450Khz Bandwidth   High speed PLC : 1Mhz-30Mhz Bandwidth   Middle/Low speed PLC : Internet information appliances, Home Networking, HA (Home Automation), Residence Remote Reading, Industry Automation, Distribution Automation, DLC (direct load control)     High speed PLC : Broadband Service   Field Contents   Home Automation Simple control field such as light control, gas valve control, and cutoff power supply   Network appliances Transmit Information between devices through network of appliances Using PLC techniques and control and monitoring at remote area without in-home   Residence   Remote Reading Collect and transmit reading data of electrical, water, gas using PLC   Industry Automation Automation system of Industry field such as Building Automation, Emergency Door Lock, Marine Automation, Street light Control