NL287044A - - Google Patents
Info
- Publication number
- NL287044A NL287044A NL287044DA NL287044A NL 287044 A NL287044 A NL 287044A NL 287044D A NL287044D A NL 287044DA NL 287044 A NL287044 A NL 287044A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of dc pulses
- H04Q1/36—Pulse-correcting arrangements, e.g. for reducing effects due to interference
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/62—Two-way amplifiers
-
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
-
- 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
- H04M19/006—Circuits for increasing the range of current supply source
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US161020A US3166642A (en) | 1961-12-21 | 1961-12-21 | Signaling arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL287044A true NL287044A (fr) |
Family
ID=22579469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL287044D NL287044A (fr) | 1961-12-21 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3166642A (fr) |
| DE (1) | DE1288166B (fr) |
| GB (1) | GB1023832A (fr) |
| NL (1) | NL287044A (fr) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3660609A (en) * | 1969-08-22 | 1972-05-02 | Communications Systems Corp | Subscriber long line extender |
| US3689700A (en) * | 1970-09-21 | 1972-09-05 | Lear Siegler Inc | Subscriber loop extension unit |
| US3746795A (en) * | 1970-11-02 | 1973-07-17 | San Bar Electronics Corp | Long line adapter circuit usable with increased power supply |
| DE2201986A1 (de) * | 1971-01-20 | 1972-08-10 | Int Standard Electric Corp | Schaltungsanordnung fuer einen Verbindungssatz einer Fernsprechnebenstellenanlage |
| US3798379A (en) * | 1971-09-22 | 1974-03-19 | Tel Ind Inc | Connector terminal dial repulser |
| US4118603A (en) * | 1977-05-31 | 1978-10-03 | Noramco, Inc. | DC signaling circuit for use in conjunction with isolation transformers |
| US4194093A (en) * | 1978-11-29 | 1980-03-18 | International Telephone And Telegraph Corporation | Key system protective apparatus |
| CA1308825C (fr) * | 1988-05-30 | 1992-10-13 | Tosho Oka | Repeteur terminal a repetition de signaux de boucle de courant continu |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2282464A (en) * | 1941-02-25 | 1942-05-12 | Bell Telephone Labor Inc | Speech transmission system |
| FR960757A (fr) * | 1944-01-07 | 1950-04-25 | ||
| BE481596A (fr) * | 1947-06-26 | |||
| BE506490A (fr) * | 1951-01-16 | |||
| GB773030A (en) * | 1955-09-13 | 1957-04-17 | Standard Telephones Cables Ltd | Improvements in or relating to local loop connectors to trunk telegraph circuits |
| US2810081A (en) * | 1955-09-27 | 1957-10-15 | Gen Dynamics Corp | Electronic switch for selectively blocking or permitting the simultaneous transmission of signals in two channels |
| US2904641A (en) * | 1955-11-29 | 1959-09-15 | Itt | Negative-impedance repeater using a transistor amplifier |
-
0
- NL NL287044D patent/NL287044A/xx unknown
-
1961
- 1961-12-21 US US161020A patent/US3166642A/en not_active Expired - Lifetime
-
1962
- 1962-12-20 DE DEW33576A patent/DE1288166B/de active Pending
- 1962-12-20 GB GB48100/62A patent/GB1023832A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3166642A (en) | 1965-01-19 |
| DE1288166B (de) | 1969-01-30 |
| GB1023832A (en) | 1966-03-23 |