04076970 is referenced by 22 patents and cites 6 patents.

A switching system for connecting any one of a plurality of electrical circuits to any one of a plurality of test positions, wherein a central controller including a microprocessor directs, in a pre-programmed manner, all necessary switching functions. In the preferred embodiment, the electrical circuits are telephone circuits and the test positions include test ports positioned in various locations around a central office so that any of the telephone circuits can be accessed for testing from any of the test ports. The controller communicates with each of the test ports and controls switching units one at a time over a common control bus.

Title
Switching system having a central controller for accessing individual telephone circuits for testing
Application Number
5/729585
Publication Number
4076970
Application Date
October 4, 1976
Publication Date
February 28, 1978
Inventor
Goro R Tahara
Sunnyvale
CA, US
G Scott Warner
Sunnyvale
CA, US
Andre Lubarsky Jr
Sunnyvale
CA, US
Agent
Limbach Limbach & Sutton
Assignee
Telecommunications Technology
CA, US
IPC
H04M 3/22
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