JPS4917111A - - Google Patents
Info
- Publication number
- JPS4917111A JPS4917111A JP5061072A JP5061072A JPS4917111A JP S4917111 A JPS4917111 A JP S4917111A JP 5061072 A JP5061072 A JP 5061072A JP 5061072 A JP5061072 A JP 5061072A JP S4917111 A JPS4917111 A JP S4917111A
- 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.)
- Pending
Links
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Interface Circuits In Exchanges (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5061072A JPS4917111A (en) | 1972-05-22 | 1972-05-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5061072A JPS4917111A (en) | 1972-05-22 | 1972-05-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS4917111A true JPS4917111A (en) | 1974-02-15 |
Family
ID=12863727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5061072A Pending JPS4917111A (en) | 1972-05-22 | 1972-05-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS4917111A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5150604A (en) * | 1974-10-30 | 1976-05-04 | Hitachi Ltd | TOKUSHUKANYUSHAKARANO KOSHORI HOSHIKI |
| JPS52137907A (en) * | 1976-05-14 | 1977-11-17 | Hitachi Ltd | Fax exchange system |
| JPS53129904A (en) * | 1977-04-19 | 1978-11-13 | Fujitsu Ltd | Exchange system |
| JPS53138208A (en) * | 1977-05-09 | 1978-12-02 | Hitachi Ltd | Loss compensation system of exchange using semiconductor channel switch |
| JPS54118109A (en) * | 1978-03-07 | 1979-09-13 | Nec Corp | Subscriber line storage system for time division exchange |
| JPS5757681U (en) * | 1981-08-13 | 1982-04-05 | ||
| JPS63309091A (en) * | 1987-06-10 | 1988-12-16 | Meisei Electric Co Ltd | Additional device for long-distance extension |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3306982A (en) * | 1962-03-30 | 1967-02-28 | Ericsson Telefon Ab L M | Level control device |
-
1972
- 1972-05-22 JP JP5061072A patent/JPS4917111A/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3306982A (en) * | 1962-03-30 | 1967-02-28 | Ericsson Telefon Ab L M | Level control device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5150604A (en) * | 1974-10-30 | 1976-05-04 | Hitachi Ltd | TOKUSHUKANYUSHAKARANO KOSHORI HOSHIKI |
| JPS5625074B2 (en) * | 1974-10-30 | 1981-06-10 | ||
| JPS52137907A (en) * | 1976-05-14 | 1977-11-17 | Hitachi Ltd | Fax exchange system |
| JPS53129904A (en) * | 1977-04-19 | 1978-11-13 | Fujitsu Ltd | Exchange system |
| JPS53138208A (en) * | 1977-05-09 | 1978-12-02 | Hitachi Ltd | Loss compensation system of exchange using semiconductor channel switch |
| JPS54118109A (en) * | 1978-03-07 | 1979-09-13 | Nec Corp | Subscriber line storage system for time division exchange |
| JPS5757681U (en) * | 1981-08-13 | 1982-04-05 | ||
| JPS63309091A (en) * | 1987-06-10 | 1988-12-16 | Meisei Electric Co Ltd | Additional device for long-distance extension |