GB9302428D0 - Battery powered telephone ringing indicator - Google Patents
Battery powered telephone ringing indicatorInfo
- Publication number
- GB9302428D0 GB9302428D0 GB939302428A GB9302428A GB9302428D0 GB 9302428 D0 GB9302428 D0 GB 9302428D0 GB 939302428 A GB939302428 A GB 939302428A GB 9302428 A GB9302428 A GB 9302428A GB 9302428 D0 GB9302428 D0 GB 9302428D0
- Authority
- GB
- United Kingdom
- Prior art keywords
- battery powered
- telephone ringing
- powered telephone
- ringing 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
- H04M19/048—Arrangements providing optical indication of the incoming call, e.g. flasher circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9302428A GB2274959B (en) | 1993-02-08 | 1993-02-08 | Battery powered telephone visual ringing indicator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9302428A GB2274959B (en) | 1993-02-08 | 1993-02-08 | Battery powered telephone visual ringing indicator |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9302428D0 true GB9302428D0 (en) | 1993-03-24 |
GB2274959A GB2274959A (en) | 1994-08-10 |
GB2274959B GB2274959B (en) | 1997-03-12 |
Family
ID=10730029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9302428A Expired - Fee Related GB2274959B (en) | 1993-02-08 | 1993-02-08 | Battery powered telephone visual ringing indicator |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2274959B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU688572B2 (en) * | 1994-10-21 | 1998-03-12 | Alcatel Australia Limited | Network service status indicators |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1389607A (en) * | 1972-09-25 | 1975-04-03 | Plessey Co Ltd | Electric lamp assembly |
US4015091A (en) * | 1975-12-05 | 1977-03-29 | Bell Telephone Laboratories, Incorporated | Telephone ringing generators |
DE3000278C2 (en) * | 1980-01-05 | 1986-05-28 | Neumann Elektronik GmbH, 4330 Mülheim | Electro-optical alarm clock |
US4578542A (en) * | 1984-05-07 | 1986-03-25 | Alderman Robert J | Line powered flasher circuit for ringing signal |
US4926459A (en) * | 1989-05-26 | 1990-05-15 | Plantronics, Inc. | Hearing assist telephone |
-
1993
- 1993-02-08 GB GB9302428A patent/GB2274959B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
GB2274959A (en) | 1994-08-10 |
GB2274959B (en) | 1997-03-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20010208 |