BE874407A - DIGITAL MULTI-FREQUENCY SIGNALING RECEPTION SYSTEM - Google Patents
DIGITAL MULTI-FREQUENCY SIGNALING RECEPTION SYSTEMInfo
- Publication number
- BE874407A BE874407A BE193659A BE193659A BE874407A BE 874407 A BE874407 A BE 874407A BE 193659 A BE193659 A BE 193659A BE 193659 A BE193659 A BE 193659A BE 874407 A BE874407 A BE 874407A
- Authority
- BE
- Belgium
- Prior art keywords
- reception system
- digital multi
- frequency signaling
- signaling reception
- frequency
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Complex Calculations (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2075178A JPS54114022A (en) | 1978-02-24 | 1978-02-24 | Digital multi-frequency receiving system |
Publications (1)
Publication Number | Publication Date |
---|---|
BE874407A true BE874407A (en) | 1979-06-18 |
Family
ID=12035883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE193659A BE874407A (en) | 1978-02-24 | 1979-02-23 | DIGITAL MULTI-FREQUENCY SIGNALING RECEPTION SYSTEM |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS54114022A (en) |
BE (1) | BE874407A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6041387A (en) * | 1983-08-17 | 1985-03-05 | Nec Corp | Signal processing device |
-
1978
- 1978-02-24 JP JP2075178A patent/JPS54114022A/en active Granted
-
1979
- 1979-02-23 BE BE193659A patent/BE874407A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPS54114022A (en) | 1979-09-05 |
JPH0526400B2 (en) | 1993-04-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Patent lapsed |
Owner name: NIPPON TELEGRAPH AND TELEPHONE CORP. Effective date: 19900228 |