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.