GB2179523B - Private telephone system - Google Patents
Private telephone systemInfo
- Publication number
- GB2179523B GB2179523B GB8521182A GB8521182A GB2179523B GB 2179523 B GB2179523 B GB 2179523B GB 8521182 A GB8521182 A GB 8521182A GB 8521182 A GB8521182 A GB 8521182A GB 2179523 B GB2179523 B GB 2179523B
- Authority
- GB
- United Kingdom
- Prior art keywords
- telephone system
- private telephone
- private
- telephone
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/71—Substation extension arrangements
- H04M1/715—Substation extension arrangements using two or more extensions per line
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Telephonic Communication Services (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8521182A GB2179523B (en) | 1985-08-23 | 1985-08-23 | Private telephone system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8521182A GB2179523B (en) | 1985-08-23 | 1985-08-23 | Private telephone system |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8521182D0 GB8521182D0 (en) | 1985-10-02 |
GB2179523A GB2179523A (en) | 1987-03-04 |
GB2179523B true GB2179523B (en) | 1989-07-19 |
Family
ID=10584247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8521182A Expired GB2179523B (en) | 1985-08-23 | 1985-08-23 | Private telephone system |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2179523B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2207325A (en) * | 1987-06-23 | 1989-01-25 | Boon Chen Lim | Telephone with intercom facility |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1356927A (en) * | 1970-10-06 | 1974-06-19 | Post Office | Telephone intercommunication systems |
GB1480226A (en) * | 1974-07-10 | 1977-07-20 | Gte International Inc | Telephone intercommunication systems |
GB1492542A (en) * | 1974-04-03 | 1977-11-23 | Gte International Inc | Telephone intercommunication system incorporating dialling arrangement |
GB1501704A (en) * | 1974-04-11 | 1978-02-22 | Ericsson Telefon Ab L M | Telephone installations and telephone sets |
-
1985
- 1985-08-23 GB GB8521182A patent/GB2179523B/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1356927A (en) * | 1970-10-06 | 1974-06-19 | Post Office | Telephone intercommunication systems |
GB1492542A (en) * | 1974-04-03 | 1977-11-23 | Gte International Inc | Telephone intercommunication system incorporating dialling arrangement |
GB1501704A (en) * | 1974-04-11 | 1978-02-22 | Ericsson Telefon Ab L M | Telephone installations and telephone sets |
GB1480226A (en) * | 1974-07-10 | 1977-07-20 | Gte International Inc | Telephone intercommunication systems |
Also Published As
Publication number | Publication date |
---|---|
GB8521182D0 (en) | 1985-10-02 |
GB2179523A (en) | 1987-03-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950823 |