NL7300764A - - Google Patents

Info

Publication number
NL7300764A
NL7300764A NL7300764A NL7300764A NL7300764A NL 7300764 A NL7300764 A NL 7300764A NL 7300764 A NL7300764 A NL 7300764A NL 7300764 A NL7300764 A NL 7300764A NL 7300764 A NL7300764 A NL 7300764A
Authority
NL
Netherlands
Application number
NL7300764A
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 filed Critical
Publication of NL7300764A publication Critical patent/NL7300764A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems
    • H04B17/401—Monitoring; Testing of relay systems with selective localization
    • H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
    • H04B17/404—Monitoring; Testing of relay systems with selective localization using different frequencies selected by local filters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
NL7300764A 1972-01-27 1973-01-18 NL7300764A (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE00915/72A SE363010B (zh) 1972-01-27 1972-01-27

Publications (1)

Publication Number Publication Date
NL7300764A true NL7300764A (zh) 1973-07-31

Family

ID=20257293

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7300764A NL7300764A (zh) 1972-01-27 1973-01-18

Country Status (7)

Country Link
US (1) US3842220A (zh)
JP (1) JPS4885019A (zh)
DE (1) DE2303581B2 (zh)
GB (1) GB1415259A (zh)
IT (1) IT1012049B (zh)
NL (1) NL7300764A (zh)
SE (1) SE363010B (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909563A (en) * 1973-11-06 1975-09-30 Wescom Procedure and apparatus for locating faults in digital repeatered lines
US3950622A (en) * 1974-10-15 1976-04-13 Culbertson Industries Inc. Line fault locating system
US3965309A (en) * 1975-01-14 1976-06-22 Trw Inc. Test system for a T carrier type telephone PCM communications system
US4042794A (en) * 1975-01-27 1977-08-16 Lynch Communication Systems Method and means for detecting an outgoing failure in a bidirectional communications span and looping the same in response thereto
DE2520042A1 (de) * 1975-05-06 1976-11-18 Hans Prof Dr Ing Marko Verfahren zur funktionspruefung der verstaerker bei einem digitalen uebertragungssystem
US4112263A (en) * 1977-04-06 1978-09-05 Gte Automatic Electric Laboratories Incorporated Modified duobinary regenerative repeater testing arrangement
DE2904057A1 (de) * 1979-02-02 1980-08-07 Siemens Ag Adressenfreie fehlerortung mittels schleifenschluss fuer nachrichtenuebertragungsstrecken
US4410986A (en) * 1981-04-16 1983-10-18 Bell Telephone Laboratories, Incorporated Error and status detection circuit for a digital regenerator using quantized feedback
US5191595A (en) * 1991-04-12 1993-03-02 Telecommunications Techniques Corporation T1 digital communications system for in-service detection and identification of malfunctioning repeaters

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3371165A (en) * 1965-04-15 1968-02-27 Bell Telephone Labor Inc Telephone central office loop-around test security circuit
FR1565552A (zh) * 1968-03-08 1969-05-02
US3649777A (en) * 1968-04-26 1972-03-14 Nippon Electric Co Supervisory apparatus for pcm regenerative repeaters
GB1364264A (en) * 1970-11-16 1974-08-21 Sits Soc It Telecom Siemens Transmission system including a monitoring system
GB1369847A (en) * 1970-12-24 1974-10-09 Sits Soc It Telecom Siemens Fault location system for pcm transmission lines
GB1369062A (en) * 1971-01-29 1974-10-02 Sits Soc It Telecom Siemens Fault location system for use in the location of faults in both a pcm link between two terminal stations

Also Published As

Publication number Publication date
US3842220A (en) 1974-10-15
JPS4885019A (zh) 1973-11-12
DE2303581A1 (de) 1973-08-02
DE2303581B2 (de) 1976-02-12
GB1415259A (en) 1975-11-26
SE363010B (zh) 1973-12-27
IT1012049B (it) 1977-03-10

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Legal Events

Date Code Title Description
BV The patent application has lapsed