SE452388B - Signalleringsmottagare och sett for mottagande av pulskodmodulerade, pcm, tonsignaler - Google Patents
Signalleringsmottagare och sett for mottagande av pulskodmodulerade, pcm, tonsignalerInfo
- Publication number
- SE452388B SE452388B SE8001315A SE8001315A SE452388B SE 452388 B SE452388 B SE 452388B SE 8001315 A SE8001315 A SE 8001315A SE 8001315 A SE8001315 A SE 8001315A SE 452388 B SE452388 B SE 452388B
- Authority
- SE
- Sweden
- Prior art keywords
- signals
- signal
- signaling
- pcm
- amplitude
- Prior art date
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Time-Division Multiplex Systems (AREA)
- Interface Circuits In Exchanges (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Mobile Radio Communication Systems (AREA)
- Electrophonic Musical Instruments (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA322,112A CA1111531A (fr) | 1979-02-22 | 1979-02-22 | Recepteur de tonalites mic |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8001315L SE8001315L (sv) | 1980-08-23 |
SE452388B true SE452388B (sv) | 1987-11-23 |
Family
ID=4113607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8001315A SE452388B (sv) | 1979-02-22 | 1980-02-19 | Signalleringsmottagare och sett for mottagande av pulskodmodulerade, pcm, tonsignaler |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS55137788A (fr) |
AT (1) | AT386312B (fr) |
CA (1) | CA1111531A (fr) |
DE (1) | DE3005740A1 (fr) |
FR (1) | FR2450017A1 (fr) |
GB (1) | GB2044039B (fr) |
IT (1) | IT1140634B (fr) |
NL (1) | NL8001026A (fr) |
SE (1) | SE452388B (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5779751A (en) * | 1980-11-05 | 1982-05-19 | Nec Corp | Signal receiver |
FR2504754A1 (fr) * | 1981-04-27 | 1982-10-29 | Thomson Csf Mat Tel | Dispositif sequenceur a memoires mortes |
US4519072A (en) * | 1982-11-10 | 1985-05-21 | Rockwell International Corporation | Answer supervision system |
JPH07171782A (ja) * | 1991-07-16 | 1995-07-11 | Haruo Konagai | 真空吸着装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1603175A (fr) * | 1968-07-30 | 1971-03-22 | ||
US3863030A (en) * | 1972-06-01 | 1975-01-28 | Gte Automatic Electric Lab Inc | Pcm tone receiver using digital spectrum analysis |
JPS51112218A (en) * | 1975-03-28 | 1976-10-04 | Hitachi Ltd | Multifrequency signal receiver |
JPS5918916B2 (ja) * | 1975-10-06 | 1984-05-01 | 株式会社日立製作所 | 多周波信号受信器 |
IT1072242B (it) * | 1976-12-17 | 1985-04-10 | Cselt Centro Studi Lab Telecom | Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica |
-
1979
- 1979-02-22 CA CA322,112A patent/CA1111531A/fr not_active Expired
-
1980
- 1980-02-13 GB GB8004800A patent/GB2044039B/en not_active Expired
- 1980-02-15 DE DE19803005740 patent/DE3005740A1/de not_active Withdrawn
- 1980-02-18 IT IT19986/80A patent/IT1140634B/it active
- 1980-02-19 SE SE8001315A patent/SE452388B/sv not_active IP Right Cessation
- 1980-02-20 FR FR8003681A patent/FR2450017A1/fr active Granted
- 1980-02-20 NL NL8001026A patent/NL8001026A/nl not_active Application Discontinuation
- 1980-02-21 AT AT0096280A patent/AT386312B/de not_active IP Right Cessation
- 1980-02-22 JP JP2152180A patent/JPS55137788A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
FR2450017A1 (fr) | 1980-09-19 |
AT386312B (de) | 1988-08-10 |
GB2044039B (en) | 1983-05-11 |
DE3005740A1 (de) | 1980-09-04 |
GB2044039A (en) | 1980-10-08 |
ATA96280A (de) | 1987-12-15 |
FR2450017B1 (fr) | 1984-05-11 |
JPS55137788A (en) | 1980-10-27 |
CA1111531A (fr) | 1981-10-27 |
IT8019986A1 (it) | 1981-08-18 |
IT8019986A0 (it) | 1980-02-18 |
IT1140634B (it) | 1986-10-01 |
SE8001315L (sv) | 1980-08-23 |
NL8001026A (nl) | 1980-08-26 |
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NUG | Patent has lapsed |
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