JPS5426406B2 - - Google Patents
Info
- Publication number
- JPS5426406B2 JPS5426406B2 JP11430574A JP11430574A JPS5426406B2 JP S5426406 B2 JPS5426406 B2 JP S5426406B2 JP 11430574 A JP11430574 A JP 11430574A JP 11430574 A JP11430574 A JP 11430574A JP S5426406 B2 JPS5426406 B2 JP S5426406B2
- Authority
- JP
- Japan
- 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
- H04M9/002—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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11430574A JPS5426406B2 (enExample) | 1974-10-05 | 1974-10-05 | |
| AU85179/75A AU494905B2 (en) | 1974-10-05 | 1975-09-25 | Akey TELEPHONE SYSTEM FOR SUBSCRIBERS |
| CA236,544A CA1033484A (en) | 1974-10-05 | 1975-09-26 | Key telephone system for subscribers |
| US05/618,122 US3985959A (en) | 1974-10-05 | 1975-09-30 | Key telephone system for subscribers |
| US05/882,104 USRE29884E (en) | 1974-10-05 | 1978-02-28 | Key telephone system for subscribers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11430574A JPS5426406B2 (enExample) | 1974-10-05 | 1974-10-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5141908A JPS5141908A (enExample) | 1976-04-08 |
| JPS5426406B2 true JPS5426406B2 (enExample) | 1979-09-04 |
Family
ID=14634533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11430574A Expired JPS5426406B2 (enExample) | 1974-10-05 | 1974-10-05 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3985959A (enExample) |
| JP (1) | JPS5426406B2 (enExample) |
| CA (1) | CA1033484A (enExample) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52129308A (en) * | 1976-04-23 | 1977-10-29 | Iwatsu Electric Co Ltd | Mutual extension talking system |
| JPS53134304A (en) * | 1977-04-22 | 1978-11-22 | Toshiba Corp | Automatic telephone exchange system |
| JPS5472908A (en) * | 1977-11-24 | 1979-06-11 | Oki Electric Ind Co Ltd | Interconnection trunk system |
| US4188511A (en) * | 1978-01-27 | 1980-02-12 | Tone Commander Systems, Inc. | Multi-link telephone intercom system |
| 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 |
| US4523056A (en) * | 1982-12-27 | 1985-06-11 | Reliance Electric Company | Telephone including resistive array for dialing and system for using such telephone |
| JPS6094598A (ja) * | 1983-10-28 | 1985-05-27 | Matsushita Electric Ind Co Ltd | ボタン電話機 |
| EP0195635B1 (en) * | 1985-03-20 | 1993-05-26 | Nec Corporation | Key telephone system |
| ES2040778T3 (es) * | 1987-06-16 | 1993-11-01 | Siemens Aktiengesellschaft | Procedimiento para una instalacion de conmutacion controlada por ordenador, especialmente para una llamada instalacion de conmutacion telefonica-key. |
| US5471523A (en) * | 1993-07-14 | 1995-11-28 | Voysys Corporation | Telephone call and voice processing system |
-
1974
- 1974-10-05 JP JP11430574A patent/JPS5426406B2/ja not_active Expired
-
1975
- 1975-09-26 CA CA236,544A patent/CA1033484A/en not_active Expired
- 1975-09-30 US US05/618,122 patent/US3985959A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5141908A (enExample) | 1976-04-08 |
| CA1033484A (en) | 1978-06-20 |
| US3985959A (en) | 1976-10-12 |
| AU8517975A (en) | 1977-03-31 |