GB8403964D0 - Telephone in use indicator - Google Patents
Telephone in use indicatorInfo
- 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- Withdrawn
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)
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GB08403964A Withdrawn GB2154392A (en) | 1984-02-15 | 1984-02-15 | Telephone in use indicator (line busy lamp) |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)
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)
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 |
-
1984
- 1984-02-15 GB GB08403964A patent/GB2154392A/en not_active Withdrawn
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) |