Information transmission system with modems coupled to a common

Details Information transmission system with modems coupled to a common Information transmission system with modems coupled to a common

1986-01-02

1986-10-14

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 98, H04J 102, H04J 312

Patent

active

046176560

ABSTRACT:
A plurality of information processors are coupled by respective modems to a communication medium at points thereof. Transmission and reception of information signals among the modems are effected through a headed located at a predetermined point on the communication medium. A pilot signal generator is provided which sends out a pilot signal having a predetermined reference level through the headend to the communication medium. Each modem is arranged to properly adjust the gain of its transmitting amplifier according to a reception level of the pilot signal for an improvement of signal transmission quality and a reliable detection of a signal collision.

REFERENCES:
patent: 2300415 (1942-11-01), Green
patent: 4007449 (1977-02-01), Vercesi
patent: 4092596 (1978-05-01), Dickinson et al.
patent: 4251881 (1981-02-01), Rvether
patent: 4271503 (1981-06-01), Eumvrian et al.
patent: 4281380 (1981-07-01), Demesa, III et al.
patent: 4281408 (1981-07-01), Bonnerot
patent: 4375691 (1983-03-01), Hackett
patent: 4411004 (1983-10-01), Graham
patent: 4425664 (1984-01-01), Sherman et al.
IEEE 802 Local Network Standard, Draft B, Chapter V.2, 8.0, Appendix, Method C, Oct. 19, 1981.

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