1) " Plt" -- As it applies to Plt Power line communication (PLC), also called Broadband over Power Lines (BPL), is wireline method of communication using the existing electric power transmission and electricity distribution lines. The carrier can communicatevoice and data by superimposing an analogue signal over the standard 50 or 60 Hz alternating current (AC). Contents 1 Types of PLC technology 1.1 PLIC 1.2 PLOC 2 Usage 2.1 Broadcasting systems using PLC 2.2 Telecontol and Data transmission 2.3 News exchange between installations of power grid 3 Broadband over power lines 4 Standards 5 FCC 6 External links Types of PLC technology There are two main classes of PLC : PLIC PLIC Power Line Indoors orInternal Telecoms (also called In-House BPL): This is using the home grid to establish telecoms, such as the Homeplug system. PLIC is one of the technologiesused in domotics (another is wireless telecoms); the utilities can offer toowireless middleware (integrated PLC and WiFi based structure). PUA is the PLCUtilities Alliance. There are also some very low-bitrate power line communication systems used for meter reading. The X.10 home automation system uses power linecommunication at the zero crossing voltage point in the AC wave. PLOC PLOC Power Line Outdoors Telecoms : this is the telecoms between the electric substations and homenetworks (PLC modems). The standard is ETSI Pl , twenty times faster than ADSL. PLC modems employs 11 volts and transmit in high frequency (1.6 to 30 MHz electric carrier ). The asymmetric speed inthe modem is generally from 256 kbit/s to 2.7 Mbit/s. In the repeater situated in the meter room the speed is up to 45 Mbit/s and canbe connected to 256 PLC modems. In the medium voltage stations, the speed from the head ends to the Internet is up to 135 M...
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