SE7709370L - - Google Patents
Info
- Publication number
- SE7709370L SE7709370L SE7709370A SE7709370A SE7709370L SE 7709370 L SE7709370 L SE 7709370L SE 7709370 A SE7709370 A SE 7709370A SE 7709370 A SE7709370 A SE 7709370A SE 7709370 L SE7709370 L SE 7709370L
- Authority
- SE
- Sweden
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
- H04M1/505—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 signals generated in digital form
-
- 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)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Telephonic Communication Services (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA259,463A CA1053821A (en) | 1976-08-19 | 1976-08-19 | Receiver/sender for signalling between telephone switching facilities |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE7709370L true SE7709370L (en) | 1978-02-20 |
Family
ID=4106691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7709370A SE7709370L (en) | 1976-08-19 | 1977-08-19 |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5324706A (en) |
| BE (1) | BE857802A (en) |
| CA (1) | CA1053821A (en) |
| DE (1) | DE2735478A1 (en) |
| ES (1) | ES461745A1 (en) |
| FR (1) | FR2362545A1 (en) |
| GB (1) | GB1553019A (en) |
| NL (1) | NL7707137A (en) |
| SE (1) | SE7709370L (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0219296A (en) * | 1988-07-05 | 1990-01-23 | Tokyo Kyoei Shokai:Kk | Hopper gate opening and closing apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3603773A (en) * | 1969-08-28 | 1971-09-07 | Vernitron Corp | Digital pulse rate generator |
| US3716794A (en) * | 1972-04-26 | 1973-02-13 | E Teggatz | Frequency dividing apparatus |
| FR2280141A1 (en) * | 1974-07-26 | 1976-02-20 | Materiel Telephonique | System of signalling between data processing centres - has seven frequency divider sub-assemblies, decoders and filters |
-
1976
- 1976-08-19 CA CA259,463A patent/CA1053821A/en not_active Expired
-
1977
- 1977-06-21 GB GB2591677A patent/GB1553019A/en not_active Expired
- 1977-06-28 NL NL7707137A patent/NL7707137A/en not_active Application Discontinuation
- 1977-08-05 DE DE19772735478 patent/DE2735478A1/en not_active Withdrawn
- 1977-08-12 JP JP9622977A patent/JPS5324706A/en active Pending
- 1977-08-16 BE BE180182A patent/BE857802A/en unknown
- 1977-08-18 FR FR7725289A patent/FR2362545A1/en not_active Withdrawn
- 1977-08-19 SE SE7709370A patent/SE7709370L/sv unknown
- 1977-08-19 ES ES461745A patent/ES461745A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES461745A1 (en) | 1978-05-01 |
| NL7707137A (en) | 1978-02-21 |
| JPS5324706A (en) | 1978-03-07 |
| DE2735478A1 (en) | 1978-02-23 |
| CA1053821A (en) | 1979-05-01 |
| BE857802A (en) | 1978-02-16 |
| FR2362545A1 (en) | 1978-03-17 |
| GB1553019A (en) | 1979-09-19 |