CH620560A5 - Arrangement for monitoring tones in an exchange operated using pulse code modulation - Google Patents
Arrangement for monitoring tones in an exchange operated using pulse code modulation Download PDFInfo
- Publication number
- CH620560A5 CH620560A5 CH319577A CH319577A CH620560A5 CH 620560 A5 CH620560 A5 CH 620560A5 CH 319577 A CH319577 A CH 319577A CH 319577 A CH319577 A CH 319577A CH 620560 A5 CH620560 A5 CH 620560A5
- Authority
- CH
- Switzerland
- Prior art keywords
- samples
- tone
- signal
- duration
- counter
- Prior art date
Links
- 238000012544 monitoring process Methods 0.000 title 1
- 230000005540 biological transmission Effects 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 14
- 230000005236 sound signal Effects 0.000 claims description 7
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 230000002688 persistence Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 2
- MOMWFXLCFJOAFX-UHFFFAOYSA-N OOOOOOOO Chemical compound OOOOOOOO MOMWFXLCFJOAFX-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation
-
- 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
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
- H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7607447A FR2345023A1 (fr) | 1976-03-16 | 1976-03-16 | Dispositif de verification des tonalites dans un centre de commutation mic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH620560A5 true CH620560A5 (en) | 1980-11-28 |
Family
ID=9170457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH319577A CH620560A5 (en) | 1976-03-16 | 1977-03-16 | Arrangement for monitoring tones in an exchange operated using pulse code modulation |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE852497A (enrdf_load_stackoverflow) |
| CH (1) | CH620560A5 (enrdf_load_stackoverflow) |
| DE (1) | DE2710954C2 (enrdf_load_stackoverflow) |
| ES (1) | ES456900A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2345023A1 (enrdf_load_stackoverflow) |
| GB (1) | GB1520233A (enrdf_load_stackoverflow) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2474785A1 (fr) * | 1980-01-09 | 1981-07-31 | Cit Alcatel | Dispositif de controle d'un generateur numerique de signaux |
| DE3116576A1 (de) * | 1981-04-27 | 1982-11-18 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Verfahren zum betreiben eines digitalen hoertongenerators |
| DE3229438A1 (de) * | 1982-08-06 | 1984-02-09 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur ueberwachung eines digitalen tongenerators |
| DE3325290A1 (de) * | 1983-07-13 | 1985-01-24 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur sperrung von durch eine teilnehmerstation eines digitalen zeitmultiplex-fernsprechvermittlungssystems gelieferten sprachinformationen in abgehender uebertragungsrichtung |
-
1976
- 1976-03-16 FR FR7607447A patent/FR2345023A1/fr active Granted
-
1977
- 1977-02-22 GB GB736177A patent/GB1520233A/en not_active Expired
- 1977-03-12 DE DE19772710954 patent/DE2710954C2/de not_active Expired
- 1977-03-16 CH CH319577A patent/CH620560A5/de not_active IP Right Cessation
- 1977-03-16 ES ES456900A patent/ES456900A1/es not_active Expired
- 1977-03-16 BE BE2055739A patent/BE852497A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2710954C2 (de) | 1984-05-30 |
| GB1520233A (en) | 1978-08-02 |
| ES456900A1 (es) | 1978-02-16 |
| DE2710954A1 (de) | 1977-09-29 |
| FR2345023A1 (fr) | 1977-10-14 |
| FR2345023B1 (enrdf_load_stackoverflow) | 1981-09-04 |
| BE852497A (fr) | 1977-09-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |