05195124 is referenced by 32 patents and cites 2 patents.

A test system for local subscriber lines, which is used with a telephone communication system having a central office exchange, local subscribers accommodated by the central office exchange, and intervening units, i.e., a central office terminal, a subscriber side remote terminal, and a transmission line connected therebetween. This test system carries out a remote test and a local test independently by using a test line connected between remote test equipment and the remote terminal in which an artificial off-hook creation unit is introduced. This unit is made active when a local test is carried out for each subscriber line, to thereby avoid an occurrence of errors in the remote test.

Title
Testing system for local subscribers
Application Number
7/781857
Publication Number
5195124
Application Date
October 24, 1991
Publication Date
March 16, 1993
Inventor
Yuzuru Ishioka
Kawasaki
JP
Agent
Welsh & Katz
Assignee
Fujitsu
JP
IPC
H04M 3/30
H04M 1/24
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