FI40726B - - Google Patents
Info
- Publication number
- FI40726B FI40726B FI1387/64A FI138764A FI40726B FI 40726 B FI40726 B FI 40726B FI 1387/64 A FI1387/64 A FI 1387/64A FI 138764 A FI138764 A FI 138764A FI 40726 B FI40726 B FI 40726B
- Authority
- FI
- Finland
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
- H04M1/738—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)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST20842A DE1188662B (de) | 1963-07-11 | 1963-07-11 | Ausgleichsnetzwerk fuer Fernsprech-Teilnehmerstationen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FI40726B true FI40726B (fi) | 1969-01-31 |
Family
ID=7458728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI1387/64A FI40726B (fi) | 1963-07-11 | 1964-06-26 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3350510A (fi) |
| CH (1) | CH428861A (fi) |
| DE (1) | DE1188662B (fi) |
| FI (1) | FI40726B (fi) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3440356A (en) * | 1965-09-22 | 1969-04-22 | Automatic Elect Lab | Automatically compensating telephone substation |
| FR1536887A (fr) * | 1966-09-12 | Bliss E W Co | Circuit anti-local | |
| GB1263384A (en) * | 1968-06-03 | 1972-02-09 | Sits Soc It Telecom Siemens | Subscriber telephone sets |
| DE1762804B2 (de) * | 1968-08-29 | 1972-01-20 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Schaltungsanordnung zur regelung der sende und empfangsbezugs daempfung einer teilnehmerstation einer fernsprechanlage |
| US3755170A (en) * | 1971-05-17 | 1973-08-28 | Continental Oil Co | Preparation of highly basic alkylphenates and sulfurized alkyphenates |
| US5073924A (en) * | 1990-05-01 | 1991-12-17 | Frisby Kenneth G | Telephone line noise filter apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE510745A (fi) * | 1951-04-18 |
-
1963
- 1963-07-11 DE DEST20842A patent/DE1188662B/de active Pending
-
1964
- 1964-06-26 FI FI1387/64A patent/FI40726B/fi active
- 1964-07-02 US US379937A patent/US3350510A/en not_active Expired - Lifetime
- 1964-07-09 CH CH899164A patent/CH428861A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH428861A (de) | 1967-01-31 |
| US3350510A (en) | 1967-10-31 |
| DE1188662B (de) | 1965-03-11 |