MX143307A - Mejoras a sistema de aislamiento para red telefonica - Google Patents

Mejoras a sistema de aislamiento para red telefonica

Info

Publication number
MX143307A
MX143307A MX171669A MX17166977A MX143307A MX 143307 A MX143307 A MX 143307A MX 171669 A MX171669 A MX 171669A MX 17166977 A MX17166977 A MX 17166977A MX 143307 A MX143307 A MX 143307A
Authority
MX
Mexico
Prior art keywords
telephone network
isolation system
isolation
telephone
network
Prior art date
Application number
MX171669A
Other languages
English (en)
Inventor
Frank L Simokat
Original Assignee
Frank L Simokat
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 Frank L Simokat filed Critical Frank L Simokat
Publication of MX143307A publication Critical patent/MX143307A/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H04M3/301—Circuit arrangements at the subscriber's side of the line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
MX171669A 1976-12-13 1977-12-09 Mejoras a sistema de aislamiento para red telefonica MX143307A (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/749,610 US4143250A (en) 1976-12-13 1976-12-13 Telephone isolation system

Publications (1)

Publication Number Publication Date
MX143307A true MX143307A (es) 1981-04-13

Family

ID=25014459

Family Applications (1)

Application Number Title Priority Date Filing Date
MX171669A MX143307A (es) 1976-12-13 1977-12-09 Mejoras a sistema de aislamiento para red telefonica

Country Status (3)

Country Link
US (1) US4143250A (es)
CA (1) CA1082379A (es)
MX (1) MX143307A (es)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197435A (en) * 1978-02-24 1980-04-08 Jackson Amos R Telephone line monitoring circuit and method
FR2502432A1 (fr) * 1981-03-18 1982-09-24 Trt Telecom Radio Electr Systeme de test de joncteurs d'abonnes
US4485271A (en) * 1982-07-30 1984-11-27 Gk Technologies, Incorporated Remotely actuable line disconnect device
US4558182A (en) * 1983-08-01 1985-12-10 Keptel, Inc. Remotely-activated switching apparatus
US4536617A (en) * 1983-08-01 1985-08-20 Keptel, Inc. Remotely-activated switching apparatus
US4550225A (en) * 1983-10-31 1985-10-29 Keptel, Inc. AC Signal-activated switching apparatus
US4582960A (en) * 1984-05-17 1986-04-15 Porta Systems Corp. Subscriber network interface device
FR2564979B1 (fr) * 1984-05-25 1988-12-09 Constr Telephoniques Systeme de localisation de defauts dans une ligne bifilaire
US4686696A (en) * 1985-12-02 1987-08-11 Keptel, Inc. Transmission line signal sensing circuit employing means for conserving power, especially for use with a telephone disconnect circuit, and associated method
US4901004A (en) * 1988-12-09 1990-02-13 King Fred N Apparatus and method for mapping the connectivity of communications systems with multiple communications paths
US4916444A (en) * 1988-03-25 1990-04-10 King Fred N Method and apparatus for mapping communications media
GB9213992D0 (en) * 1992-07-01 1992-08-12 Raychem Ltd Remotely actuated switch and protection circuit
TW264598B (es) * 1992-07-01 1995-12-01 Ray Chem Ltd
GB9218134D0 (en) * 1992-08-26 1992-10-14 Raychem Sa Nv Communication channel switching arrangement
US6347075B1 (en) * 1997-12-31 2002-02-12 At&T Corp. Circuit to provide backup telephone service for a multiple service access system using a twisted pair
GB2503442A (en) * 2012-06-26 2014-01-01 Ibm Locating faults in a network
US10230226B1 (en) 2018-07-03 2019-03-12 Afl Telecommunications Llc Network interface devices

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739107A (en) * 1970-10-13 1973-06-12 Superior Continental Corp On premise telephone loop tester
US3773986A (en) * 1971-12-13 1973-11-20 Comm Systems Corp Telephone line test isolation apparatus
US3909538A (en) * 1972-05-19 1975-09-30 Sava Jacobson Control circuit for telephone answering device with end of tape detection means
US3867588A (en) * 1973-06-01 1975-02-18 Terra Corp Quick disconnect for telecommunication lines
US3912882A (en) * 1973-12-07 1975-10-14 Tm Systems Remote loop-back terminating unit for testing telephone
IT1027215B (it) * 1974-12-31 1978-11-20 Cane Mario Dispositivo per controllare a di stanza l efficienza di apparecchiature elettriche
US4041255A (en) * 1976-09-29 1977-08-09 Northern Telecom Limited Switching circuit for telecommunications lines
US4054759A (en) * 1976-11-15 1977-10-18 Northern Telecom Limited Subscriber loop verification device and method

Also Published As

Publication number Publication date
US4143250A (en) 1979-03-06
CA1082379A (en) 1980-07-22

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