Automatic network speed adapter

Details Automatic network speed adapter Automatic network speed adapter

1995-05-05

1997-01-21

Olms, Douglas W.

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

H04J 322

Patent

active

055965750

ABSTRACT:
A network adapter for interfacing between a communication network and a host computer operating as a network device, and a method of operation of these components. The adapter is initially conditioned to transmit at a lower of two possible speeds, such as 10 Mbps instead of 100 Mbps, and then senses at which speed the network is operating, before matching to this sensed speed, either the higher speed or the lower speed. If the sensed speed is the lower speed, the adapter transmits a burst of high-speed signals and senses again for high-speed operation. If the network has not switched to high-speed operation, the adapter is conditioned for low-speed operation. After the adapter is conditioned for low-speed or high-speed operation, the network speed is continually sensed and, if the network is not operating at the selected speed for some preselected period of time, the adapter is returned to its initial low-speed state to begin network speed sensing over again.

REFERENCES:
patent: 5442629 (1995-08-01), Geyer et al.
patent: 5488609 (1996-01-01), Hluchyj et al.
patent: 5502752 (1996-03-01), Averbuch et al.
patent: 5509050 (1996-04-01), Berland

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