NL255324A - - Google Patents
Info
- Publication number
- NL255324A NL255324A NL255324DA NL255324A NL 255324 A NL255324 A NL 255324A NL 255324D A NL255324D A NL 255324DA NL 255324 A NL255324 A NL 255324A
- Authority
- NL
- Netherlands
Links
Classifications
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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
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
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- 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
- H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
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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
- H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST11464A DE1023794B (de) | 1956-07-26 | 1956-07-26 | Schaltungsanordnung zur UEbertragung von eine Verbindungsherstellung veranlassenden Signalkennzeichen von einer in der Teilnehmerstation befindlichen Sende- zu einer in der Vermittlungsstelle befindlichen Empfangseinrichtung nach der Vergleichsmethode in Fernmelde-, insbesondere Fernsprechanlagen |
| DEST15520A DE1113013B (de) | 1959-08-29 | 1959-08-29 | Verfahren zur Signalgabe mit Tonfrequenzspannungen ueber die Teilnehmeranschlussleitungen in Fernsprechanlagen |
| FR836887A FR78574E (fr) | 1956-07-26 | 1960-08-26 | Système de transmission de signaux en particulier pour les appels téléphoniques |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL255324A true NL255324A (de) |
Family
ID=27212390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL255324D NL255324A (de) | 1956-07-26 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR78574E (de) |
| NL (1) | NL255324A (de) |
-
0
- NL NL255324D patent/NL255324A/xx unknown
-
1960
- 1960-08-26 FR FR836887A patent/FR78574E/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR78574E (fr) | 1962-08-10 |