Multiplex communications – Wide area network – Packet switching
Patent
1984-06-25
1987-02-10
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
3701101, H04Q 1104
Patent
active
046428054
ABSTRACT:
A pair of integrated circuits are described which provide a digital link between a branch exchange and a voice and data channel using an ordinary twisted pair. The downlink circuit permits coupling to a serial asynchronous port of different protocol than that used over the link and for instance, this port may be coupled to a keyboard, display or data terminal.
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Dumas Gregory P.
Sutterlin Philip H.
Olms Douglas W.
Rokoff Kenneth J.
Rolm Corporation
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