SE359997B - - Google Patents
Info
- Publication number
- SE359997B SE359997B SE05599/69A SE559969A SE359997B SE 359997 B SE359997 B SE 359997B SE 05599/69 A SE05599/69 A SE 05599/69A SE 559969 A SE559969 A SE 559969A SE 359997 B SE359997 B SE 359997B
- Authority
- SE
- Sweden
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
- H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
- H04M9/007—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line wherein the key telephone sets are star-connected to a central unit by a limited number of lines
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US72606268A | 1968-05-02 | 1968-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE359997B true SE359997B (de) | 1973-09-10 |
Family
ID=24917066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE05599/69A SE359997B (de) | 1968-05-02 | 1969-04-21 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3549820A (de) |
| BE (1) | BE732365A (de) |
| DE (1) | DE1921782B2 (de) |
| FR (1) | FR2007689A1 (de) |
| GB (1) | GB1264821A (de) |
| SE (1) | SE359997B (de) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH519283A (it) * | 1969-09-12 | 1972-02-15 | Cselt Centro Studi Lab Telecom | Concentratore di traffico telefonico semielettronico con struttura ad albero |
| US3651272A (en) * | 1970-06-05 | 1972-03-21 | Bell Telephone Labor Inc | Program controlled key telephone system for automatically connecting unanswered calls to stations |
| CA1018270A (en) * | 1972-05-23 | 1977-09-27 | Federico R. Laliccia | Key telephone system using time division and space division control |
| GB1437031A (en) * | 1973-04-04 | 1976-05-26 | Plessey Co Ltd | House exchange telephone system |
| US4027110A (en) * | 1973-12-05 | 1977-05-31 | Iwasaki Tsushinki Kabushiki Kaisha | Key telephone system |
| US4092501A (en) * | 1973-12-05 | 1978-05-30 | Iwasaki Tsushinki Kabushiki Kaisha | Key telephone system |
| US3973085A (en) * | 1974-09-26 | 1976-08-03 | The Anaconda Company | Key telephone system with directly associated station cards and sets |
| FR2335107A1 (fr) * | 1975-10-15 | 1977-07-08 | Lannionnais Electronique | Concentrateur spatial |
| GB1575002A (en) * | 1976-03-11 | 1980-09-17 | Post Office | Data transmission system |
| US4196316A (en) * | 1977-09-13 | 1980-04-01 | Bell Telephone Laboratories, Incorporated | Program controlled communication system having individually rearrangeable line selection |
| US4480152A (en) * | 1982-02-26 | 1984-10-30 | Western Electric Company, Inc. | Methods and apparatus for protecting line relay contacts in a telephone switching system |
| JPS58195393A (ja) * | 1982-05-10 | 1983-11-14 | Nec Corp | ボタン電話装置 |
| US4511766A (en) * | 1983-04-21 | 1985-04-16 | Northern Telecom Limited | Key telephone system signalling and control arrangement |
| US4511767A (en) * | 1983-04-21 | 1985-04-16 | Northern Telecom Limited | Key telephone system signalling and control arrangement |
| US4499338A (en) * | 1983-04-21 | 1985-02-12 | Northern Telecom, Ltd. | Key telephone system signalling and control arrangement |
-
1968
- 1968-05-02 US US726062A patent/US3549820A/en not_active Expired - Lifetime
-
1969
- 1969-04-21 SE SE05599/69A patent/SE359997B/xx unknown
- 1969-04-29 DE DE19691921782 patent/DE1921782B2/de active Pending
- 1969-04-30 FR FR6913953A patent/FR2007689A1/fr active Pending
- 1969-04-30 BE BE732365D patent/BE732365A/xx not_active IP Right Cessation
- 1969-05-01 GB GB1264821D patent/GB1264821A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1921782A1 (de) | 1969-11-06 |
| BE732365A (de) | 1969-10-01 |
| DE1921782B2 (de) | 1971-04-15 |
| US3549820A (en) | 1970-12-22 |
| GB1264821A (de) | 1972-02-23 |
| FR2007689A1 (de) | 1970-01-09 |