JPS5619784B2 - - Google Patents
Info
- Publication number
- JPS5619784B2 JPS5619784B2 JP15069275A JP15069275A JPS5619784B2 JP S5619784 B2 JPS5619784 B2 JP S5619784B2 JP 15069275 A JP15069275 A JP 15069275A JP 15069275 A JP15069275 A JP 15069275A JP S5619784 B2 JPS5619784 B2 JP S5619784B2
- 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
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/001—Current supply source at the exchanger providing current to substations
- H04M19/005—Feeding arrangements without the use of line transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1722074A CH586984A5 (en) | 1974-12-23 | 1974-12-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5186904A JPS5186904A (en) | 1976-07-30 |
| JPS5619784B2 true JPS5619784B2 (en) | 1981-05-09 |
Family
ID=4423697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15069275A Granted JPS5186904A (en) | 1974-12-23 | 1975-12-19 | KANYUSHAKAISENINTAAFUEISUKAIRO |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5186904A (en) |
| CH (1) | CH586984A5 (en) |
| DE (1) | DE2551816C3 (en) |
| FR (1) | FR2296339A1 (en) |
| GB (1) | GB1481750A (en) |
| IT (1) | IT1049925B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5413715A (en) * | 1977-07-01 | 1979-02-01 | Nippon Telegr & Teleph Corp <Ntt> | Four-wire switching system |
| JPS5494810A (en) * | 1978-01-11 | 1979-07-26 | Hitachi Ltd | Supply system for channel current |
| JPS5494811A (en) * | 1978-01-11 | 1979-07-26 | Hitachi Ltd | Supply system for channel current |
| FR2414832A1 (en) * | 1978-01-13 | 1979-08-10 | Labo Cent Telecommunicat | SUPPLY BRIDGE FOR TELEPHONE LINE |
| IT1159706B (en) * | 1978-06-02 | 1987-03-04 | Cselt Centro Studi Lab Telecom | USER LINE ELECTRONIC TELEPHONE CIRCUIT |
| NL7810086A (en) * | 1978-10-06 | 1980-04-09 | Philips Nv | POWER BRIDGE FOR A SUBSCRIBER FLOW. |
| US4254305A (en) * | 1979-02-07 | 1981-03-03 | International Telephone And Telegraph Corporation | Current limited subscriber line feed circuit |
| FR2460078B1 (en) * | 1979-06-25 | 1986-12-12 | Trt Telecom Radio Electr | ELECTRONIC SUBSCRIBER |
| CA1157175A (en) * | 1981-02-20 | 1983-11-15 | Mitel Corporation | Power saving line circuit |
| DE3214624C2 (en) * | 1982-04-20 | 1986-05-28 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for evaluating subscriber loop states in telephone systems, in particular in telephone branch exchange systems |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3649769A (en) * | 1970-10-28 | 1972-03-14 | Gen Electric | Circuit for supplying direct current to a telephone line |
-
1974
- 1974-12-23 CH CH1722074A patent/CH586984A5/xx not_active IP Right Cessation
-
1975
- 1975-10-31 GB GB4527575A patent/GB1481750A/en not_active Expired
- 1975-11-10 FR FR7535236A patent/FR2296339A1/en active Granted
- 1975-11-19 DE DE19752551816 patent/DE2551816C3/en not_active Expired
- 1975-11-28 IT IT2975975A patent/IT1049925B/en active
- 1975-12-19 JP JP15069275A patent/JPS5186904A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3649769A (en) * | 1970-10-28 | 1972-03-14 | Gen Electric | Circuit for supplying direct current to a telephone line |
Also Published As
| Publication number | Publication date |
|---|---|
| CH586984A5 (en) | 1977-04-15 |
| IT1049925B (en) | 1981-02-10 |
| DE2551816A1 (en) | 1976-06-24 |
| FR2296339B1 (en) | 1981-12-31 |
| JPS5186904A (en) | 1976-07-30 |
| DE2551816C3 (en) | 1980-10-30 |
| DE2551816B2 (en) | 1979-06-13 |
| FR2296339A1 (en) | 1976-07-23 |
| GB1481750A (en) | 1977-08-03 |