Communication services using the low voltage distribution network

The extension of the operation of power line carrier systems from the kilohertz to the megahertz frequency range of operation introduced a new dimension to the operation of these systems. Initial investigations using the higher frequencies commenced in the early 1990s in many countries but primarily in the USA and Europe. Data transmission and reception is not confined to well prescribed frequencies but rather to a frequency band in the high frequency range of 1 MHz to 10 MHz, although a few experiments are being carried out at frequencies as high as 30 MHz. Operating in these frequency hands provides an increase in bandwidth, and the consequent increase in capacity for new communication services. These new services include broadband communication services, Internet services, ISDN telephone services and video on demand