Data port expander

Details Data port expander Data port expander

1995-12-18

1997-07-15

Lall, Parshotam S.

Multiplex communications

Wide area network

Packet switching

3952002, 39520021, 370200, G06F 300, H04J 302

Patent

active

056491115

ABSTRACT:
A device which attaches multiple workstations, printers, computers or the like to a single lobe of a communications network includes a multistation access unit (MAU) with multiple ports and a voltage generator unit which generates a phantom current to activate a remote switch which allows one or more ports on the MAU to transmit or receive information from the communications network.

REFERENCES:
patent: 4701630 (1987-10-01), Annunziata et al.
patent: 5179291 (1993-01-01), Nishikawa et al.
patent: 5199026 (1993-03-01), Lund
patent: 5303387 (1994-04-01), Millard et al.
patent: 5311515 (1994-05-01), Henderson et al.
patent: 5353286 (1994-10-01), Patrick et al.

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