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ZA984964B - Telephone line monitoring device - Google Patents

Telephone line monitoring device

Info

Publication number
ZA984964B
ZA984964B ZA984964A ZA984964A ZA984964B ZA 984964 B ZA984964 B ZA 984964B ZA 984964 A ZA984964 A ZA 984964A ZA 984964 A ZA984964 A ZA 984964A ZA 984964 B ZA984964 B ZA 984964B
Authority
ZA
South Africa
Prior art keywords
monitoring device
telephone line
line monitoring
telephone
monitoring
Prior art date
Application number
ZA984964A
Inventor
Kenneth F Vaughan
Original Assignee
Evergreen Communication Techno
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 Evergreen Communication Techno filed Critical Evergreen Communication Techno
Publication of ZA984964B publication Critical patent/ZA984964B/en

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
ZA984964A 1997-06-10 1998-06-09 Telephone line monitoring device ZA984964B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87192297A 1997-06-10 1997-06-10

Publications (1)

Publication Number Publication Date
ZA984964B true ZA984964B (en) 1999-01-11

Family

ID=25358451

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA984964A ZA984964B (en) 1997-06-10 1998-06-09 Telephone line monitoring device

Country Status (12)

Country Link
JP (1) JP2001508981A (en)
CN (1) CN1250569A (en)
AR (1) AR005214A1 (en)
AU (1) AU7813898A (en)
BR (1) BR9808861A (en)
CA (1) CA2278235A1 (en)
CO (1) CO4780075A1 (en)
ES (1) ES2157176B1 (en)
PE (1) PE100299A1 (en)
UY (1) UY25038A1 (en)
WO (1) WO1998057483A1 (en)
ZA (1) ZA984964B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6283919B1 (en) 1996-11-26 2001-09-04 Atl Ultrasound Ultrasonic diagnostic imaging with blended tissue harmonic signals
US5879303A (en) 1996-09-27 1999-03-09 Atl Ultrasound Ultrasonic diagnostic imaging of response frequency differing from transmit frequency
IL152824A (en) * 2002-11-13 2012-05-31 Mosaid Technologies Inc Addressable outlet and a network using same
DE10334127A1 (en) * 2003-07-25 2005-02-24 Rohde & Schwarz Gmbh & Co. Kg Mobile device with remote-controlled reclosing function
CN104486513B (en) * 2014-11-14 2017-02-22 中国电子科技集团公司第三十研究所 Device and method for realizing multi-channel SIM card equipment centralized management and maintenance

Family Cites Families (6)

* 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
CA1140690A (en) * 1978-07-19 1983-02-01 Everhard H.B. Bartelink Remote supervisory system for monitoring telephone subscriber premises
US4446340A (en) * 1982-04-23 1984-05-01 Calculagraph Company Customer premises loop test unit powered from the normal central office power source
US4817137A (en) * 1987-11-30 1989-03-28 Yechiel Rosenfeld Apparatus for remotely determining hook status conditions
US4937851A (en) * 1988-07-20 1990-06-26 Keptel, Inc. Loop status verification system
US4864598A (en) * 1988-07-20 1989-09-05 Keptel, Inc. Loop status verification system

Also Published As

Publication number Publication date
CO4780075A1 (en) 1999-05-26
CN1250569A (en) 2000-04-12
AR005214A1 (en) 1999-04-28
UY25038A1 (en) 1998-07-10
ES2157176A1 (en) 2001-08-01
PE100299A1 (en) 1999-10-15
JP2001508981A (en) 2001-07-03
BR9808861A (en) 2000-08-01
WO1998057483A1 (en) 1998-12-17
AU7813898A (en) 1998-12-30
ES2157176B1 (en) 2002-01-16
CA2278235A1 (en) 1998-12-17

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