NL6703645A - - Google Patents
Info
- Publication number
- NL6703645A NL6703645A NL6703645A NL6703645A NL6703645A NL 6703645 A NL6703645 A NL 6703645A NL 6703645 A NL6703645 A NL 6703645A NL 6703645 A NL6703645 A NL 6703645A NL 6703645 A NL6703645 A NL 6703645A
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1831964 | 1964-08-25 | ||
| IT833666 | 1966-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6703645A true NL6703645A (xx) | 1967-10-16 |
Family
ID=26326037
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6511059A NL6511059A (xx) | 1964-08-25 | 1965-08-24 | |
| NL6703645A NL6703645A (xx) | 1964-08-25 | 1967-03-08 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6511059A NL6511059A (xx) | 1964-08-25 | 1965-08-24 |
Country Status (3)
| Country | Link |
|---|---|
| DE (2) | DE1265231B (xx) |
| GB (2) | GB1059606A (xx) |
| NL (2) | NL6511059A (xx) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2548159C2 (de) * | 1975-10-28 | 1983-05-11 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Schaltungsanordnung für den akustischen Ruf in einer Chef- und Sekretärfernsprechanlage |
| GB2240239A (en) * | 1990-01-17 | 1991-07-24 | Carl Mikael Bellman Aktiebolag | Sound-signal device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1108749B (de) * | 1958-05-06 | 1961-06-15 | Telefonbau | Schaltungsanordnung zur Ausloesung eines tonfrequenten Rufes an Teilnehmer-stellen von Fernsprechanlagen |
| NL252052A (xx) * | 1959-05-28 | |||
| GB956356A (en) * | 1960-07-21 | 1964-04-22 | Standard Telephones Cables Ltd | Improvements in or relating to signalling methods between subscriber's sets and exchage |
-
1965
- 1965-08-04 GB GB3330965A patent/GB1059606A/en not_active Expired
- 1965-08-24 NL NL6511059A patent/NL6511059A/xx unknown
- 1965-08-25 DE DE1965S0099043 patent/DE1265231B/de active Pending
-
1967
- 1967-02-02 GB GB511467A patent/GB1117340A/en not_active Expired
- 1967-03-08 NL NL6703645A patent/NL6703645A/xx unknown
- 1967-04-11 DE DE1967S0109288 patent/DE1289130B/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| GB1117340A (en) | 1968-06-19 |
| DE1265231B (de) | 1968-04-04 |
| GB1059606A (en) | 1967-02-22 |
| DE1289130B (de) | 1969-02-13 |
| NL6511059A (xx) | 1966-02-28 |