Alarm information transfer system for use in a digital transmiss

Details Alarm information transfer system for use in a digital transmiss Alarm information transfer system for use in a digital transmiss

1994-10-21

1996-10-15

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340505, 340517, 340518, 34082514, G08B 2900

Patent

active

055658423

ABSTRACT:
An alarm information transfer system used in a digital transmission device can overcome a problem that all communications are stopped when a clock signal, which is sent from a master unit to slave units, is disconnected. In this system, the master unit sends ID numbers sequentially for specifying slave units, and alarm information is sent to the master unit from a slave unit specified by an ID number. The other slave units which are not specified by the ID numbers sent from the master unit store the alarm information sent from the specified slave unit, and one of the slave units detecting the disconnection of the clock signal from the master unit becomes a master unit to continue communication.

REFERENCES:
patent: 4672374 (1987-06-01), Desjardins
patent: 4673920 (1987-06-01), Ferguson
patent: 4994788 (1991-02-01), Philippe et al.

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