GB2325113B - A line voltage monitoring circuit - Google Patents

A line voltage monitoring circuit

Info

Publication number
GB2325113B
GB2325113B GB9800573A GB9800573A GB2325113B GB 2325113 B GB2325113 B GB 2325113B GB 9800573 A GB9800573 A GB 9800573A GB 9800573 A GB9800573 A GB 9800573A GB 2325113 B GB2325113 B GB 2325113B
Authority
GB
United Kingdom
Prior art keywords
line voltage
monitoring circuit
voltage monitoring
circuit
line
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.)
Expired - Fee Related
Application number
GB9800573A
Other versions
GB9800573D0 (en
GB2325113A (en
Inventor
John Oliver Byrne
Arthur Anthony Cremin
Kenneth Joseph Cunningham
Thomas Joseph Delaney
Seamus Columbia Gallagher
Gerald Fachtna Healy
Brian Vincent Keogh
Robert Alan O'brien
Thomas Brendan O'gorman
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.)
Lake Electronic Technologies Ltd
Original Assignee
Lake Electronic Technologies 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 Lake Electronic Technologies Ltd filed Critical Lake Electronic Technologies Ltd
Publication of GB9800573D0 publication Critical patent/GB9800573D0/en
Publication of GB2325113A publication Critical patent/GB2325113A/en
Application granted granted Critical
Publication of GB2325113B publication Critical patent/GB2325113B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB9800573A 1997-05-07 1998-01-12 A line voltage monitoring circuit Expired - Fee Related GB2325113B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE970331A IE970331A1 (en) 1997-05-07 1997-05-07 A line voltage monitoring circuit

Publications (3)

Publication Number Publication Date
GB9800573D0 GB9800573D0 (en) 1998-03-11
GB2325113A GB2325113A (en) 1998-11-11
GB2325113B true GB2325113B (en) 2002-05-29

Family

ID=11041463

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9800573A Expired - Fee Related GB2325113B (en) 1997-05-07 1998-01-12 A line voltage monitoring circuit

Country Status (2)

Country Link
GB (1) GB2325113B (en)
IE (1) IE970331A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI756165B (en) * 2014-11-25 2022-03-01 以色列商奧寶科技有限公司 Illumination intensity control apparatus and method, and optical inspection system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220825A (en) * 1978-12-04 1980-09-02 Gte Sylvania Incorporated Telephone status monitor circit
US5291545A (en) * 1990-10-02 1994-03-01 Intertex Data Ab Apparatus and method for determining the state of a telephone line
US5422939A (en) * 1993-08-05 1995-06-06 Schlumberger Industries, Inc. Parallel off-hook detection for both line-available and phone pick-up detection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220825A (en) * 1978-12-04 1980-09-02 Gte Sylvania Incorporated Telephone status monitor circit
US5291545A (en) * 1990-10-02 1994-03-01 Intertex Data Ab Apparatus and method for determining the state of a telephone line
US5422939A (en) * 1993-08-05 1995-06-06 Schlumberger Industries, Inc. Parallel off-hook detection for both line-available and phone pick-up detection

Also Published As

Publication number Publication date
GB9800573D0 (en) 1998-03-11
GB2325113A (en) 1998-11-11
IE970331A1 (en) 1998-11-18

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20120920 AND 20120926

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20140112