03980839 is referenced by 18 patents and cites 6 patents.

A data processing system for monitoring a telephone switching system comprises a microprocessor controller, random access and read only memories, and data input and error output means. The data processing system analyzes the received data to determine if the switching system is operating correctly, and if it is not outputs coded information indicating the errors discovered and methods for switching system repair.

Title
Maintenance monitor for telephone switching systems
Application Number
5/530960
Publication Number
3980839
Application Date
December 9, 1974
Publication Date
September 14, 1976
Inventor
Alan G Hutcheson
Reno
NV, US
Agent
Phillips Moore Weissenberger Lempio & Strabala
Assignee
Lynch Communication Systems
NV, US
IPC
H04M 3/24
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