Method and apparatus for identifying newly installed modem in di

Details Method and apparatus for identifying newly installed modem in di Method and apparatus for identifying newly installed modem in di

1990-12-26

1992-10-20

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370 858, 370 92, 34082507, 34082508, 34082552, H04J 302, H04J 324

Patent

active

051576589

ABSTRACT:
In order to identify a newly installed modem joining other modems which are already installed and established communications with a control unti, the newly installed modem generates, upon installation, a first logic state on an install detecting line which normally exhibits a second logic state. In response to the first logic state on the install detecting line, the control unit issues addresses which cover a predetermined maximum number of modems which can be managed by the control unit. The newly installed modem generates a reply signal in response to an address assigned thereto. The reply signal is sent to the control unit, and hence the control signal identifies the newly installed modem and is ready for establishing communication therewith.

REFERENCES:
patent: 3787627 (1974-01-01), Abramson et al.
patent: 4253087 (1981-02-01), Saal
patent: 4510493 (1985-04-01), Bux et al.
patent: 4638313 (1987-01-01), Sherwood, Jr. et al.
patent: 4761646 (1988-08-01), Choquet et al.
patent: 4825204 (1989-04-01), Nakamura

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