Extenders that use copper wire include 2- and 4-wire variants using unconditioned copper wiring to extend a LANs. Network extenders use various methods (line encodings), such as TC-PAM, 2B1Q or DMT, to transmit information. While transmitting over copper wire does not allow for the speeds that fiber-optic transmission does, it allows the use of existing voice-grade copper wiring. Copper-based Ethernet extenders must be used on unconditioned wire, ie without load coils, such as unused twisted pairs and alarm circuits.
Gosh, don't you hate that electrical outlet clutter?(HOME NETWORKING)(Netgear Powerline Network Extender XEPS103)(Brief article)
Jun 16, 2007; Netgear says its space-saving Powerline Network Extender (XEPS103), which is compatible with other Netgear HomePlug 1.0 Powerline...