JPS6453657A - Supervising system for low order group digital transmission line - Google Patents

Supervising system for low order group digital transmission line

Info

Publication number
JPS6453657A
JPS6453657A JP3803688A JP3803688A JPS6453657A JP S6453657 A JPS6453657 A JP S6453657A JP 3803688 A JP3803688 A JP 3803688A JP 3803688 A JP3803688 A JP 3803688A JP S6453657 A JPS6453657 A JP S6453657A
Authority
JP
Japan
Prior art keywords
monitor
output
transmission line
low order
digital transmission
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
JP3803688A
Other languages
Japanese (ja)
Other versions
JPH0575302B2 (en
Inventor
Hidesuke Motoi
Noboru Nakama
Atsushi Suzuki
Eiji Sugawara
Naoyuki Kato
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3803688A priority Critical patent/JPS6453657A/en
Publication of JPS6453657A publication Critical patent/JPS6453657A/en
Publication of JPH0575302B2 publication Critical patent/JPH0575302B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To collect error rate information from respective repeaters in an operation condition by providing a tertiary winding to generate a monitor output in respective repeaters. CONSTITUTION:In the operation condition, a monitor output is taken out from tertiary windings M1 and M2 of a repeater, the monitor output is fetched by an analog switch SW, added to a converter B/U and a unipolar output is added to an error monitor EM. The error monitor EM fetches H and L levels by a clock reproduced with the converter B/U, an input turn-off is detected (since a signal is an AMI code, positive and negative pulses are alternately received.), collects it as error rate information (10<-3>, 10<-4>, 10<-5> errors, etc.) and sends it to a processor. The processor transmits this to a monitor station by an FSK.
JP3803688A 1987-02-20 1988-02-19 Supervising system for low order group digital transmission line Granted JPS6453657A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3803688A JPS6453657A (en) 1987-02-20 1988-02-19 Supervising system for low order group digital transmission line

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3891687 1987-02-20
JP3803688A JPS6453657A (en) 1987-02-20 1988-02-19 Supervising system for low order group digital transmission line

Publications (2)

Publication Number Publication Date
JPS6453657A true JPS6453657A (en) 1989-03-01
JPH0575302B2 JPH0575302B2 (en) 1993-10-20

Family

ID=26377217

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3803688A Granted JPS6453657A (en) 1987-02-20 1988-02-19 Supervising system for low order group digital transmission line

Country Status (1)

Country Link
JP (1) JPS6453657A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038364A (en) * 1988-11-28 1991-08-06 Fujitsu Limited Transmission line monitoring system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038364A (en) * 1988-11-28 1991-08-06 Fujitsu Limited Transmission line monitoring system

Also Published As

Publication number Publication date
JPH0575302B2 (en) 1993-10-20

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