GB2227628B - Call control device for telephones - Google Patents
Call control device for telephonesInfo
- Publication number
- GB2227628B GB2227628B GB9000949A GB9000949A GB2227628B GB 2227628 B GB2227628 B GB 2227628B GB 9000949 A GB9000949 A GB 9000949A GB 9000949 A GB9000949 A GB 9000949A GB 2227628 B GB2227628 B GB 2227628B
- Authority
- GB
- United Kingdom
- Prior art keywords
- telephones
- control device
- call control
- call
- control
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/667—Preventing unauthorised calls from a telephone set
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/667—Preventing unauthorised calls from a telephone set
- H04M1/67—Preventing unauthorised calls from a telephone set by electronic means
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB898901680A GB8901680D0 (en) | 1989-01-26 | 1989-01-26 | Call control device for telephones |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9000949D0 GB9000949D0 (en) | 1990-03-14 |
GB2227628A GB2227628A (en) | 1990-08-01 |
GB2227628B true GB2227628B (en) | 1993-06-16 |
Family
ID=10650619
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB898901680A Pending GB8901680D0 (en) | 1989-01-26 | 1989-01-26 | Call control device for telephones |
GB9000949A Expired - Fee Related GB2227628B (en) | 1989-01-26 | 1990-01-16 | Call control device for telephones |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB898901680A Pending GB8901680D0 (en) | 1989-01-26 | 1989-01-26 | Call control device for telephones |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB8901680D0 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2243050B (en) * | 1990-04-12 | 1994-06-29 | Pullway Ltd | Telephone call control device and method |
GB2355864A (en) * | 1999-10-27 | 2001-05-02 | R W Data Ltd | Switched data outlet socket assembly |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4683583A (en) * | 1985-04-01 | 1987-07-28 | Kossor Michael G | Method and apparatus for controlling telephone line access |
GB2219444A (en) * | 1988-04-09 | 1989-12-06 | Rathdown Ind Ltd | A lockable telephone extension plug |
-
1989
- 1989-01-26 GB GB898901680A patent/GB8901680D0/en active Pending
-
1990
- 1990-01-16 GB GB9000949A patent/GB2227628B/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4683583A (en) * | 1985-04-01 | 1987-07-28 | Kossor Michael G | Method and apparatus for controlling telephone line access |
GB2219444A (en) * | 1988-04-09 | 1989-12-06 | Rathdown Ind Ltd | A lockable telephone extension plug |
Also Published As
Publication number | Publication date |
---|---|
GB2227628A (en) | 1990-08-01 |
GB9000949D0 (en) | 1990-03-14 |
GB8901680D0 (en) | 1989-03-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19960116 |