Title: Automatic telecommunication exchange system

Abstract: A system for centralized reporting of alarm conditions in a multinode data handling system includes an alarm concentration unit at each node of the system for collecting alarm conditions. Each alarm concentration unit is coupled to a signal transmission unit which generates alarm messages and transmits the messages to a centralized node. The centralized node includes means for comparing each received messages with previously received messages stored in a memory and for amending the memory when the most recent received message differs from a previously stored message.

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Inventors: Butcher, John A. W. (Stansted, GB)
Salino, Michael A. (Hatfield, GB)

Application Number: 973695
Filing Date: 1978-12-27
Publication_date: 1980-11-11
Assignee: Standard Telephones and Cables Limited (London, GB2)
Primary Class(es): 178/69G
Other Classes:
US Patent Ref:

3839707	Oct, 1974	Woodward et al.	179/15.
3996423	Dec, 1976	Colton et al.	179/15.
4055808	Oct, 1977	Holsinger et al.	178/69.

Other Refs:
Primary Examiner: Robinson, Thomas A.
Assistant Examiner:
Attorney: Raden; James B., Lenkszus; Donald J.