A serial intelligent
cell (SIC) and a connection topology for local area networks using Electrically-conducting media. A
local area network can be configured from a plurality of SIC's interconnected so that all communications between two adjacent SIC's is both point-to-point and bidirectional. Each SIC can be connected to one or more other SIC's to allow redundant communication paths. Communications in different areas of a SIC network are independent of one another, so that, unlike current
bus topology and star topology, there is no fundamental limit on the size or extent of a SIC network. Each SIC can optionally be connected to one or more data terminals, computers, telephones, sensors, actuators, etc., to facilitate
interconnectivity among such devices. Networks according to the present invention can be configured for a variety of applications, including a local telephone
system,
remote computer bus extender, multiplexers, PABX / PBX functionality, security systems, and local
broadcasting services. The network can use dedicated wiring, as well as existing wiring as the in-house telephone or
electrical wiring.