JPS53106554A - Monitoring system for spare oscillator in subsidiary synchronizing network - Google Patents

Monitoring system for spare oscillator in subsidiary synchronizing network

Info

Publication number
JPS53106554A
JPS53106554A JP2184077A JP2184077A JPS53106554A JP S53106554 A JPS53106554 A JP S53106554A JP 2184077 A JP2184077 A JP 2184077A JP 2184077 A JP2184077 A JP 2184077A JP S53106554 A JPS53106554 A JP S53106554A
Authority
JP
Japan
Prior art keywords
monitoring system
synchronizing network
spare
oscillator
spare oscillator
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
JP2184077A
Other languages
Japanese (ja)
Other versions
JPS6023558B2 (en
Inventor
Haruo Tsuda
Hidetoshi Shirakawa
Kokichi Ichijo
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
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Nippon Electric Co 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, NEC Corp, Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP52021840A priority Critical patent/JPS6023558B2/en
Publication of JPS53106554A publication Critical patent/JPS53106554A/en
Publication of JPS6023558B2 publication Critical patent/JPS6023558B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To simplify the constitution of monitoring, by performing monitor with high accuracy and high reliability through taking the frequency transmitted as the reference frequency when the frequency information branching path is normal, and by inhibiting the monitor of spare oscillator in independent synchronizing condition so that useless alarm is not transmitted.
COPYRIGHT: (C)1978,JPO&Japio
JP52021840A 1977-02-28 1977-02-28 Standby oscillator monitoring method in dependent synchronous network Expired JPS6023558B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52021840A JPS6023558B2 (en) 1977-02-28 1977-02-28 Standby oscillator monitoring method in dependent synchronous network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52021840A JPS6023558B2 (en) 1977-02-28 1977-02-28 Standby oscillator monitoring method in dependent synchronous network

Publications (2)

Publication Number Publication Date
JPS53106554A true JPS53106554A (en) 1978-09-16
JPS6023558B2 JPS6023558B2 (en) 1985-06-07

Family

ID=12066268

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52021840A Expired JPS6023558B2 (en) 1977-02-28 1977-02-28 Standby oscillator monitoring method in dependent synchronous network

Country Status (1)

Country Link
JP (1) JPS6023558B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56128091A (en) * 1980-03-13 1981-10-07 Fujitsu Ltd Clock distribution system
JPS61173600A (en) * 1985-01-29 1986-08-05 Fujitsu Ltd Selecting circuit of clock signal
JPS61260798A (en) * 1985-05-15 1986-11-18 Hitachi Ltd Route selecting circuit
JPS62262539A (en) * 1986-05-09 1987-11-14 Hitachi Ltd Subsequent synchronizing system
JPH0316441A (en) * 1989-06-14 1991-01-24 Fujitsu Ltd Slave synchronizing clock selection system
JPH04175028A (en) * 1990-07-23 1992-06-23 Fujitsu Ltd Transmission line interface circuit for multi-channel connector

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56128091A (en) * 1980-03-13 1981-10-07 Fujitsu Ltd Clock distribution system
JPS6250035B2 (en) * 1980-03-13 1987-10-22 Fujitsu Kk
JPS61173600A (en) * 1985-01-29 1986-08-05 Fujitsu Ltd Selecting circuit of clock signal
JPH0787625B2 (en) * 1985-01-29 1995-09-20 富士通株式会社 Clock signal selection circuit
JPS61260798A (en) * 1985-05-15 1986-11-18 Hitachi Ltd Route selecting circuit
JPS62262539A (en) * 1986-05-09 1987-11-14 Hitachi Ltd Subsequent synchronizing system
JPH0316441A (en) * 1989-06-14 1991-01-24 Fujitsu Ltd Slave synchronizing clock selection system
JPH04175028A (en) * 1990-07-23 1992-06-23 Fujitsu Ltd Transmission line interface circuit for multi-channel connector

Also Published As

Publication number Publication date
JPS6023558B2 (en) 1985-06-07

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