GB8403964D0 - Telephone in use indicator - Google Patents

Telephone in use indicator

Info

Publication number
GB8403964D0
GB8403964D0 GB848403964A GB8403964A GB8403964D0 GB 8403964 D0 GB8403964 D0 GB 8403964D0 GB 848403964 A GB848403964 A GB 848403964A GB 8403964 A GB8403964 A GB 8403964A GB 8403964 D0 GB8403964 D0 GB 8403964D0
Authority
GB
United Kingdom
Prior art keywords
telephone
use indicator
indicator
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.)
Withdrawn
Application number
GB848403964A
Other versions
GB2154392A (en
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.)
HENDERSON P
Original Assignee
HENDERSON P
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 HENDERSON P filed Critical HENDERSON P
Priority to GB08403964A priority Critical patent/GB2154392A/en
Publication of GB8403964D0 publication Critical patent/GB8403964D0/en
Publication of GB2154392A publication Critical patent/GB2154392A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/82—Line monitoring circuits for call progress or status discrimination

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
  • Telephone Set Structure (AREA)
GB08403964A 1984-02-15 1984-02-15 Telephone in use indicator (line busy lamp) Withdrawn GB2154392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08403964A GB2154392A (en) 1984-02-15 1984-02-15 Telephone in use indicator (line busy lamp)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08403964A GB2154392A (en) 1984-02-15 1984-02-15 Telephone in use indicator (line busy lamp)

Publications (2)

Publication Number Publication Date
GB8403964D0 true GB8403964D0 (en) 1984-03-21
GB2154392A GB2154392A (en) 1985-09-04

Family

ID=10556637

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08403964A Withdrawn GB2154392A (en) 1984-02-15 1984-02-15 Telephone in use indicator (line busy lamp)

Country Status (1)

Country Link
GB (1) GB2154392A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2206467B (en) * 1987-07-02 1991-05-01 Glynn John Hawkins On-line warning device
US5210791A (en) * 1990-12-13 1993-05-11 Michael Krasik Telephone headset on-line indicator
US5530737A (en) 1993-03-22 1996-06-25 Phonex Corporation Secure access telephone extension system and method
US5608794A (en) * 1995-08-04 1997-03-04 Larson; Dana Telephone headset in-use indicator
AU3966900A (en) * 1999-04-15 2000-11-02 Telefonaktiebolaget Lm Ericsson (Publ) Arrangement for improving a telephone system
NO991801L (en) 1999-04-15 2000-10-16 Ericsson Telefon Ab L M Procedure for improving a telephone system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB881274A (en) * 1959-04-10 1961-11-01 Gen Electric Co Ltd Improvements in or relating to electrical apparatus for indicating the flow of an electric current in a telephone line
GB2014826B (en) * 1978-02-21 1982-03-31 Cohen E Telephone intruder alarm system
GB2068682A (en) * 1979-12-06 1981-08-12 Finn M Telephone eavesdropper detector

Also Published As

Publication number Publication date
GB2154392A (en) 1985-09-04

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)