BE646362A - - Google Patents
Info
- Publication number
- BE646362A BE646362A BE646362DA BE646362A BE 646362 A BE646362 A BE 646362A BE 646362D A BE646362D A BE 646362DA BE 646362 A BE646362 A BE 646362A
- Authority
- BE
- Belgium
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
-
- 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
-
- 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
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Devices For Supply Of Signal Current (AREA)
- Telephonic Communication Services (AREA)
- Telephone Function (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST20496A DE1180420B (de) | 1963-04-10 | 1963-04-10 | Rufverfahren fuer Fernsprechanlagen |
| DEST020497 | 1963-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE646362A true BE646362A (de) | 1964-10-12 |
Family
ID=25994169
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE646362D BE646362A (de) | 1963-04-10 | 1964-04-10 | |
| BE646363D BE646363A (de) | 1963-04-10 | 1964-04-10 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE646363D BE646363A (de) | 1963-04-10 | 1964-04-10 |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US3342948A (de) |
| BE (2) | BE646362A (de) |
| CH (2) | CH412019A (de) |
| DE (1) | DE1437543B2 (de) |
| NL (2) | NL6403792A (de) |
| SE (1) | SE325615B (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2338395A (en) * | 1940-06-25 | 1944-01-04 | Gen Electric | Signal transmission system |
| US2432204A (en) * | 1944-01-05 | 1947-12-09 | Rca Corp | Pulse modulation system |
| US3061783A (en) * | 1956-04-30 | 1962-10-30 | Lynch Carrier Systems Inc | Inband signalling system |
| US3156775A (en) * | 1959-12-02 | 1964-11-10 | Itt | Telephone converter |
| US3210479A (en) * | 1962-08-30 | 1965-10-05 | Automatic Elect Lab | Voice-frequency selective signalling arrangement |
| US3240879A (en) * | 1962-12-18 | 1966-03-15 | Bell Telephone Labor Inc | Alarm circuits in portable radio telephone system |
-
1963
- 1963-04-10 DE DE19631437543 patent/DE1437543B2/de active Pending
-
1964
- 1964-03-24 US US354326A patent/US3342948A/en not_active Expired - Lifetime
- 1964-03-24 SE SE03622/64A patent/SE325615B/xx unknown
- 1964-03-25 US US354682A patent/US3349185A/en not_active Expired - Lifetime
- 1964-04-03 CH CH424064A patent/CH412019A/de unknown
- 1964-04-08 CH CH444464A patent/CH406324A/de unknown
- 1964-04-09 NL NL6403792A patent/NL6403792A/xx unknown
- 1964-04-09 NL NL6403791A patent/NL6403791A/xx unknown
- 1964-04-10 BE BE646362D patent/BE646362A/xx unknown
- 1964-04-10 BE BE646363D patent/BE646363A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH412019A (de) | 1966-04-30 |
| CH406324A (de) | 1966-01-31 |
| BE646363A (de) | 1964-10-12 |
| SE325615B (de) | 1970-07-06 |
| US3342948A (en) | 1967-09-19 |
| DE1437543A1 (de) | 1970-07-23 |
| US3349185A (en) | 1967-10-24 |
| DE1437543B2 (de) | 1971-10-14 |
| NL6403791A (de) | 1964-10-12 |
| NL6403792A (de) | 1964-10-12 |