SE371921B - - Google Patents
Info
- Publication number
- SE371921B SE371921B SE7101310A SE131071A SE371921B SE 371921 B SE371921 B SE 371921B SE 7101310 A SE7101310 A SE 7101310A SE 131071 A SE131071 A SE 131071A SE 371921 B SE371921 B SE 371921B
- Authority
- SE
- Sweden
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/76—Compensating for differences in line impedance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP45010508A JPS495644B1 (en:Method) | 1970-02-07 | 1970-02-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE371921B true SE371921B (en:Method) | 1974-12-02 |
Family
ID=11752140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7101310A SE371921B (en:Method) | 1970-02-07 | 1971-02-03 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3681538A (en:Method) |
| JP (1) | JPS495644B1 (en:Method) |
| DE (1) | DE2105533C3 (en:Method) |
| GB (1) | GB1321744A (en:Method) |
| SE (1) | SE371921B (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2811065C3 (de) * | 1978-03-14 | 1983-06-16 | Willi Studer, Fabrik für elektronische Apparate, Regensdorf | Fernsprech-Gabelschaltung |
| JPS5831122B2 (ja) * | 1979-01-19 | 1983-07-04 | 仁 伊藤 | 混合回路 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE510745A (en:Method) * | 1951-04-18 | |||
| GB1164931A (en) * | 1967-01-04 | 1969-09-24 | Standard Telephones Cables Ltd | Automatic Regulation of Telephone Sets. |
| NL165629C (nl) * | 1967-10-23 | 1981-04-15 | Sits Soc It Telecom Siemens | Telefoontoestel. |
-
1970
- 1970-02-07 JP JP45010508A patent/JPS495644B1/ja active Pending
-
1971
- 1971-02-03 SE SE7101310A patent/SE371921B/xx unknown
- 1971-02-04 US US112664A patent/US3681538A/en not_active Expired - Lifetime
- 1971-02-05 DE DE2105533A patent/DE2105533C3/de not_active Expired
- 1971-04-19 GB GB2105471A patent/GB1321744A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2105533A1 (de) | 1971-08-26 |
| JPS495644B1 (en:Method) | 1974-02-08 |
| GB1321744A (en) | 1973-06-27 |
| US3681538A (en) | 1972-08-01 |
| DE2105533B2 (de) | 1973-01-25 |
| DE2105533C3 (de) | 1980-04-30 |