JPS6337729A - Loop back test control system for transmission line - Google Patents

Loop back test control system for transmission line

Info

Publication number
JPS6337729A
JPS6337729A JP18010186A JP18010186A JPS6337729A JP S6337729 A JPS6337729 A JP S6337729A JP 18010186 A JP18010186 A JP 18010186A JP 18010186 A JP18010186 A JP 18010186A JP S6337729 A JPS6337729 A JP S6337729A
Authority
JP
Japan
Prior art keywords
test
tester
line
sent
transmission line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP18010186A
Inventor
Yuzo Nakamura
Original Assignee
Nec Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nec Corp filed Critical Nec Corp
Priority to JP18010186A priority Critical patent/JPS6337729A/en
Publication of JPS6337729A publication Critical patent/JPS6337729A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To take the loop back test of each device connected to a transmission line by using only one kind of test code by providing a switch which connects a test circuit sending circuit to the transmission line at the time of test code detection.
CONSTITUTION: A test code from a tester is sent through a line 4. When a test code detecting circuit 1 detects the test code, a test code sending circuit 2 is controlled to send out specific test codes to the tester by as many as predetermined for each device. In such a case, the changeover switch 2 is placed on a side shown by a broken line in a figure and the test codes are sent to the tester. The changeover switch 3 is switched to a full line side after the test codes are sent, and a signal inputted to a device is sent out to the tester side by a line 5. Consequently, the tester identifies a looped-back place (equipment) from the received test codes and thus takes the loop back test.
COPYRIGHT: (C)1988,JPO&Japio
JP18010186A 1986-08-01 1986-08-01 Loop back test control system for transmission line Pending JPS6337729A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18010186A JPS6337729A (en) 1986-08-01 1986-08-01 Loop back test control system for transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18010186A JPS6337729A (en) 1986-08-01 1986-08-01 Loop back test control system for transmission line

Publications (1)

Publication Number Publication Date
JPS6337729A true JPS6337729A (en) 1988-02-18

Family

ID=16077445

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18010186A Pending JPS6337729A (en) 1986-08-01 1986-08-01 Loop back test control system for transmission line

Country Status (1)

Country Link
JP (1) JPS6337729A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5156243A (en) * 1989-11-15 1992-10-20 Mazda Motor Corporation Operation apparatus for vehicle automatic transmission mechanism
US6948582B2 (en) 2001-03-02 2005-09-27 Toyota Jidosha Kabushiki Kaisha Shift device for vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5156243A (en) * 1989-11-15 1992-10-20 Mazda Motor Corporation Operation apparatus for vehicle automatic transmission mechanism
US6948582B2 (en) 2001-03-02 2005-09-27 Toyota Jidosha Kabushiki Kaisha Shift device for vehicle
US7100467B2 (en) 2001-03-02 2006-09-05 Toyota Jidosha Kabushiki Kaisha Shift device for vehicle
US7117970B2 (en) 2001-03-02 2006-10-10 Toyota Jidosha Kabushiki Kaisha Shift device for vehicle
US7137475B2 (en) 2001-03-02 2006-11-21 Toyota Jidosha Kabushiki Kaisha Shift device for vehicle

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