LU64933A1 - - Google Patents
Info
- Publication number
- LU64933A1 LU64933A1 LU64933DA LU64933A1 LU 64933 A1 LU64933 A1 LU 64933A1 LU 64933D A LU64933D A LU 64933DA LU 64933 A1 LU64933 A1 LU 64933A1
- Authority
- LU
- Luxembourg
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2111787 | 1971-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU64933A1 true LU64933A1 (en:Method) | 1972-07-07 |
Family
ID=5801255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU64933D LU64933A1 (en:Method) | 1971-03-11 | 1972-03-09 |
Country Status (9)
| Country | Link |
|---|---|
| AT (1) | AT323811B (en:Method) |
| BE (1) | BE780525A (en:Method) |
| CH (1) | CH541914A (en:Method) |
| DE (1) | DE2111787B1 (en:Method) |
| FR (1) | FR2129593A5 (en:Method) |
| GB (1) | GB1370163A (en:Method) |
| IT (1) | IT956223B (en:Method) |
| LU (1) | LU64933A1 (en:Method) |
| NL (1) | NL7202872A (en:Method) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4028498A (en) * | 1974-10-07 | 1977-06-07 | Solid State Systems, Inc. | Private automatic branch exchange system and apparatus |
| DE3007942A1 (de) * | 1980-03-01 | 1981-09-24 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Schaltungsanordnung zum einspeisen von hoertoenen |
| DE3014572C2 (de) * | 1980-04-16 | 1982-12-09 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Schaltungsanordnung zum Senden von Niederfrequenzsignalen auf Verbindungsleitungen in Fernsprechvermittlungsanlagen |
| IE54008B1 (en) * | 1982-11-17 | 1989-05-10 | Lake Electronic Tech | Apparatus for delivering a signal on a telephone |
-
1971
- 1971-03-11 DE DE19712111787D patent/DE2111787B1/de active Pending
-
1972
- 1972-02-21 CH CH245672A patent/CH541914A/de not_active IP Right Cessation
- 1972-02-24 AT AT151872A patent/AT323811B/de not_active IP Right Cessation
- 1972-03-03 NL NL7202872A patent/NL7202872A/xx unknown
- 1972-03-08 GB GB1069572A patent/GB1370163A/en not_active Expired
- 1972-03-09 LU LU64933D patent/LU64933A1/xx unknown
- 1972-03-10 BE BE780525A patent/BE780525A/xx unknown
- 1972-03-10 IT IT21669/72A patent/IT956223B/it active
- 1972-03-10 FR FR7208410A patent/FR2129593A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL7202872A (en:Method) | 1972-09-13 |
| IT956223B (it) | 1973-10-10 |
| DE2111787B1 (de) | 1972-05-31 |
| BE780525A (fr) | 1972-09-11 |
| CH541914A (de) | 1973-09-15 |
| AT323811B (de) | 1975-07-25 |
| GB1370163A (en) | 1974-10-16 |
| FR2129593A5 (en:Method) | 1972-10-27 |