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JPS6436188A - Balance network setting system - Google Patents

Balance network setting system

Info

Publication number
JPS6436188A
JPS6436188A JP19118187A JP19118187A JPS6436188A JP S6436188 A JPS6436188 A JP S6436188A JP 19118187 A JP19118187 A JP 19118187A JP 19118187 A JP19118187 A JP 19118187A JP S6436188 A JPS6436188 A JP S6436188A
Authority
JP
Japan
Prior art keywords
pseudo
subscriber circuit
balance network
setting
signal
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
JP19118187A
Other languages
Japanese (ja)
Inventor
Hiroyuki Endo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
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 JP19118187A priority Critical patent/JPS6436188A/en
Publication of JPS6436188A publication Critical patent/JPS6436188A/en
Pending legal-status Critical Current

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  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To select and set a balance network automatically by providing a pseudo subscriber circuit, using a mixing signal having plural frequencies as the setting signal and measuring its reflection attenuation. CONSTITUTION:The setting signal having frequencies more than two kinds or over is inputted as a 4-wire side input to a hybrid circuit 11 in a pseudo subscriber circuit 15 provided separately via a test means 1 in the subscriber circuit, sent to a subscriber line and the reflection attenuation of the reflection signal is measured by switching pseudo balance networks 12-14 in the pseudo subscriber circuit 15. The pseudo balance network whose reflection attenuation is a prescribed value or over is selected and the balance network in the subscriber circuit 6 is set automatically based on the result. Thus, for example, a microprocessor is used to attain automation, the man-hour for setting is saved and the load of the software is releaved and accurate setting is attained.
JP19118187A 1987-07-30 1987-07-30 Balance network setting system Pending JPS6436188A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19118187A JPS6436188A (en) 1987-07-30 1987-07-30 Balance network setting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19118187A JPS6436188A (en) 1987-07-30 1987-07-30 Balance network setting system

Publications (1)

Publication Number Publication Date
JPS6436188A true JPS6436188A (en) 1989-02-07

Family

ID=16270248

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19118187A Pending JPS6436188A (en) 1987-07-30 1987-07-30 Balance network setting system

Country Status (1)

Country Link
JP (1) JPS6436188A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0644708A (en) * 1990-08-17 1994-02-18 Quantum Corp Method for determining position of head of data transducer head

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5580989A (en) * 1978-12-15 1980-06-18 Nec Corp Automatic balancing system for exchange
JPS5834667A (en) * 1981-08-24 1983-03-01 Hitachi Ltd Balanced network selection control method
JPS6143840A (en) * 1984-08-08 1986-03-03 Nec Corp Adaptive type two-wire four-wire converting circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5580989A (en) * 1978-12-15 1980-06-18 Nec Corp Automatic balancing system for exchange
JPS5834667A (en) * 1981-08-24 1983-03-01 Hitachi Ltd Balanced network selection control method
JPS6143840A (en) * 1984-08-08 1986-03-03 Nec Corp Adaptive type two-wire four-wire converting circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0644708A (en) * 1990-08-17 1994-02-18 Quantum Corp Method for determining position of head of data transducer head

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