JPS6454851A - Exchange with variable setting pad - Google Patents

Exchange with variable setting pad

Info

Publication number
JPS6454851A
JPS6454851A JP21184387A JP21184387A JPS6454851A JP S6454851 A JPS6454851 A JP S6454851A JP 21184387 A JP21184387 A JP 21184387A JP 21184387 A JP21184387 A JP 21184387A JP S6454851 A JPS6454851 A JP S6454851A
Authority
JP
Japan
Prior art keywords
damping
pad
pads
damping quantity
accuracy
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.)
Granted
Application number
JP21184387A
Other languages
Japanese (ja)
Other versions
JPH0659068B2 (en
Inventor
Kazumasa Ide
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 JP21184387A priority Critical patent/JPH0659068B2/en
Publication of JPS6454851A publication Critical patent/JPS6454851A/en
Publication of JPH0659068B2 publication Critical patent/JPH0659068B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To realize the insertion of a required damping quantity to a speech path even when a pad with low setting accuracy is used, by calculating an actual damping quantity from a test signal outputted by a test machine and a returned damping signal, and setting the damping quantities of first and second pads so as to obtain a value nearest to the damping quantity designated in advance. CONSTITUTION:The actual damping quantity is calculated by a control circuit 9 from the test signal SG outputted from the test machine 3 and the damping signal DT in which the test signal SG is returned via the first and second pads 51 and 52 and via an up and a down speech paths, and a calculated damping quantity is set so as to be the value nearest to the damping quantity designated in advance by controlling the first and second pads 51 and 52. In such a way, the accuracy of the damping quantity inserted to a line actually is not related to the setting accuracy of a pad element, thereby it is not required to design and manufacture the pad with high accuracy.
JP21184387A 1987-08-25 1987-08-25 Exchanger with variable setting pad Expired - Lifetime JPH0659068B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21184387A JPH0659068B2 (en) 1987-08-25 1987-08-25 Exchanger with variable setting pad

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21184387A JPH0659068B2 (en) 1987-08-25 1987-08-25 Exchanger with variable setting pad

Publications (2)

Publication Number Publication Date
JPS6454851A true JPS6454851A (en) 1989-03-02
JPH0659068B2 JPH0659068B2 (en) 1994-08-03

Family

ID=16612506

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21184387A Expired - Lifetime JPH0659068B2 (en) 1987-08-25 1987-08-25 Exchanger with variable setting pad

Country Status (1)

Country Link
JP (1) JPH0659068B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02244862A (en) * 1989-03-17 1990-09-28 Nec Corp Subscriber line test system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02244862A (en) * 1989-03-17 1990-09-28 Nec Corp Subscriber line test system

Also Published As

Publication number Publication date
JPH0659068B2 (en) 1994-08-03

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