NL7200987A - - Google Patents
Info
- Publication number
- NL7200987A NL7200987A NL7200987A NL7200987A NL7200987A NL 7200987 A NL7200987 A NL 7200987A NL 7200987 A NL7200987 A NL 7200987A NL 7200987 A NL7200987 A NL 7200987A NL 7200987 A NL7200987 A NL 7200987A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
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- 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)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7200987A NL158674B (nl) | 1972-01-25 | 1972-01-25 | Inrichting voor het opwekken van een signaleringstoon in een telefoonverbindingsstelsel. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7200987A NL158674B (nl) | 1972-01-25 | 1972-01-25 | Inrichting voor het opwekken van een signaleringstoon in een telefoonverbindingsstelsel. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NL7200987A true NL7200987A (cs) | 1973-07-27 |
| NL158674B NL158674B (nl) | 1978-11-15 |
Family
ID=19815229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7200987A NL158674B (nl) | 1972-01-25 | 1972-01-25 | Inrichting voor het opwekken van een signaleringstoon in een telefoonverbindingsstelsel. |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL158674B (cs) |
-
1972
- 1972-01-25 NL NL7200987A patent/NL158674B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL158674B (nl) | 1978-11-15 |