NL109525C - - Google Patents
Info
- Publication number
- NL109525C NL109525C NL109525DA NL109525C NL 109525 C NL109525 C NL 109525C NL 109525D A NL109525D A NL 109525DA NL 109525 C NL109525 C NL 109525C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
-
- 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
- H04Q1/448—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Devices For Supply Of Signal Current (AREA)
- Telephonic Communication Services (AREA)
- Electronic Switches (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL215380 | 1957-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL109525C true NL109525C (ja) |
Family
ID=19750843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL109525D NL109525C (ja) | 1957-03-14 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3008009A (ja) |
| JP (1) | JPS3513053B1 (ja) |
| BE (1) | BE565636A (ja) |
| CH (1) | CH362127A (ja) |
| DE (1) | DE1051912B (ja) |
| FR (1) | FR1258823A (ja) |
| GB (1) | GB887275A (ja) |
| NL (1) | NL109525C (ja) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1090273B (de) * | 1959-05-09 | 1960-10-06 | Philips Nv | Schaltungsanordnung zur Auswertung von Signalen verschiedener Frequenzen in Fernmeldeanlagen |
| FR81782E (ja) * | 1961-06-19 | 1964-01-31 | ||
| DE1201417B (de) * | 1964-07-10 | 1965-09-23 | Standard Elektrik Lorenz Ag | Tonfrequentes Tastwahlverfahren ohne Gleichstrom-Wahlbegleitzeichen in Fernmelde-, insbesondere Fernsprechanlagen und Schaltungsanordnung zur Durchfuehrung des Verfahrens |
| DE2162898A1 (de) * | 1971-06-22 | 1972-12-28 | Sits Soc It Telecom Siemens | Schaltungsanordnung zum Identifizieren von Gleichstromsignalen in einer Fernsprechanlage mit Tastenwahl |
| US3784759A (en) * | 1972-04-17 | 1974-01-08 | Bell Canada Northern Electric | Telephone substation apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE519608A (ja) * | 1952-05-01 | |||
| US2817828A (en) * | 1953-10-07 | 1957-12-24 | Bell Telephone Labor Inc | Multifrequency high speed signaling system employing pulses of signaling currents ofpredetermined duration based on orthogonal functions |
-
0
- BE BE565636D patent/BE565636A/xx unknown
- NL NL109525D patent/NL109525C/xx active
-
1958
- 1958-02-28 US US718326A patent/US3008009A/en not_active Expired - Lifetime
- 1958-03-11 DE DEN14783A patent/DE1051912B/de active Pending
- 1958-03-11 GB GB7797/58A patent/GB887275A/en not_active Expired
- 1958-03-12 JP JP642358A patent/JPS3513053B1/ja active Pending
- 1958-03-12 FR FR760331A patent/FR1258823A/fr not_active Expired
- 1958-03-12 CH CH362127D patent/CH362127A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB887275A (en) | 1962-01-17 |
| BE565636A (ja) | |
| US3008009A (en) | 1961-11-07 |
| JPS3513053B1 (ja) | 1960-09-09 |
| DE1051912B (de) | 1959-03-05 |
| FR1258823A (fr) | 1961-04-21 |
| CH362127A (de) | 1962-05-31 |