Multiplex communications – Wide area network – Packet switching
Patent
1985-04-08
1988-02-23
Orsino, Jr., Joseph A.
Multiplex communications
Wide area network
Packet switching
250551, 379379, 455602, H04B 900
Patent
active
047275359
ABSTRACT:
An analog coupling device for coupling a telephone to a telephone network circuit while maintaining isolation of the two circuits has an optical emitting element and an optical receiving element in the network circuit. The telephone circuit includes an optical receiving element optically coupled with the network circuit optical emitting element. The telephone circuit optical receiving element has a reversed biased pn junction. The telephone circuit further includes an optical emitting element which is optically coupled with the network optical receiving element.
REFERENCES:
patent: 4056719 (1977-11-01), Waaben
patent: 4133982 (1979-01-01), Lee et al.
patent: 4243890 (1981-01-01), Miller et al.
patent: 4282604 (1981-08-01), Jefferson
patent: 4365164 (1982-12-01), Siblex
patent: 4558183 (1985-12-01), Corris et al.
Boswell Herb
Orsino Jr. Joseph A.
Rapitech System Inc.
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