FI42587B - - Google Patents
Info
- Publication number
- FI42587B FI42587B FI1538/61A FI153861A FI42587B FI 42587 B FI42587 B FI 42587B FI 1538/61 A FI1538/61 A FI 1538/61A FI 153861 A FI153861 A FI 153861A FI 42587 B FI42587 B FI 42587B
- Authority
- FI
- Finland
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/40—Artificial lines; Networks simulating a line of certain length
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/42—Circuits for by-passing of ringing signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/44—Arrangements for feeding power to a repeater along the transmission line
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Control Of Resistance Heating (AREA)
- Interface Circuits In Exchanges (AREA)
- Direct Current Feeding And Distribution (AREA)
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES70663A DE1126941B (de) | 1960-09-30 | 1960-09-30 | Schaltungsanordnung zum Ausregeln des Daempfungsunterschiedes verschieden langer Fernmeldeleitungen |
| DES80116A DE1288161B (de) | 1960-09-30 | 1962-06-28 | Schaltungsanordnung zum Ausregeln des Daempfungsunterschiedes verschieden langer Fernmeldeleitungen |
| DES80117A DE1288162B (de) | 1960-09-30 | 1962-06-28 | Schaltungsanordnung zum Ausregeln des Daempfungsunterschiedes verschieden langer Fernmeldeleitungen |
| DES81669A DE1261898B (de) | 1960-09-30 | 1962-09-26 | Schaltungsanordnung zum Ausregeln des Daempfungsunterschiedes verschieden langer Fernmeldeleitungen |
| DES84671A DE1256719B (de) | 1960-09-30 | 1963-04-11 | Schaltungsanordnung zum Ausregeln des Daempfungsunterschiedes verschieden langer Fernmeldeleitungen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FI42587B true FI42587B (US07122603-20061017-C00045.png) | 1970-06-01 |
Family
ID=27512275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI1538/61A FI42587B (US07122603-20061017-C00045.png) | 1960-09-30 | 1961-08-31 |
Country Status (5)
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3339027A (en) * | 1964-10-07 | 1967-08-29 | Bell Telephone Labor Inc | Telephone line range extension circuitry |
| US3504127A (en) * | 1967-05-02 | 1970-03-31 | Bell Telephone Labor Inc | Direct current compensation circuit for transformer couplings |
| US3621143A (en) * | 1969-04-04 | 1971-11-16 | Lorain Prod Corp | Current-controlled voltage booster for telephone systems |
| US3914560A (en) * | 1971-10-13 | 1975-10-21 | Superior Continental Corp | Self-adjusting repeater for voice frequency telephone transmission systems |
| US4176255A (en) * | 1978-03-24 | 1979-11-27 | Bell Telephone Laboratories, Incorporated | Adjustable impedance battery feed circuit |
| NL7805416A (nl) * | 1978-05-19 | 1979-11-21 | Philips Nv | Zelf-instellende vorkschakeling. |
| GB2041700B (en) * | 1978-12-30 | 1982-12-08 | Plessey Co Ltd | Balance on 2-4 wire hybrid circuits |
| US4791668A (en) * | 1987-09-23 | 1988-12-13 | Northern Telecom Limited | Selectable impedance line interface circuit |
| DE4139610C2 (de) * | 1991-11-30 | 1996-07-11 | Siemens Nixdorf Inf Syst | Verfahren zum Einstellen von Signalübertragungsparamtern von Teilnehmeranschlußschaltungen |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR748843A (fr) * | 1932-01-20 | 1933-07-10 | Materiel Telephonique | Perfectionnements apportés aux systèmes électriques de transmission de signaux par courants alternatifs |
| US2732436A (en) * | 1947-12-22 | 1956-01-24 | Frequency in cycles per second | |
| DE1069214B (de) * | 1955-09-17 | 1959-11-19 | Antoi., zugl | Schaltungsanordnung ziuim Regeln des Speisestroms für zentrallgespeiste Anschlußstellen in Fernmeldeanlagen |
| US3035122A (en) * | 1958-09-30 | 1962-05-15 | Gen Dynamics Corp | Constant current line circuitt for loop telephone lines |
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0
- NL NL269763D patent/NL269763A/xx unknown
-
1961
- 1961-08-11 CH CH942261A patent/CH389035A/de unknown
- 1961-08-31 FI FI1538/61A patent/FI42587B/fi active
- 1961-09-18 US US138733A patent/US3187104A/en not_active Expired - Lifetime
-
1962
- 1962-06-28 DE DES80116A patent/DE1288161B/de active Pending
- 1962-06-28 DE DES80117A patent/DE1288162B/de active Pending
- 1962-09-26 DE DES81669A patent/DE1261898B/de active Pending
-
1963
- 1963-04-11 DE DES84671A patent/DE1256719B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CH389035A (de) | 1965-03-15 |
| DE1288161B (de) | 1969-01-30 |
| US3187104A (en) | 1965-06-01 |
| DE1261898B (de) | 1968-02-29 |
| DE1256719B (de) | 1967-12-21 |
| DE1288162B (de) | 1969-01-30 |
| NL269763A (US07122603-20061017-C00045.png) |
