JPS5353908A - Dial signal selection circuit - Google Patents
Dial signal selection circuitInfo
- Publication number
- JPS5353908A JPS5353908A JP12921976A JP12921976A JPS5353908A JP S5353908 A JPS5353908 A JP S5353908A JP 12921976 A JP12921976 A JP 12921976A JP 12921976 A JP12921976 A JP 12921976A JP S5353908 A JPS5353908 A JP S5353908A
- Authority
- JP
- Japan
- Prior art keywords
- selection circuit
- signal selection
- dial signal
- circuit
- dial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/677—Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Selective Calling Equipment (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
PURPOSE:To make small the circuit inn size, to reduce the cost, and to improve the reliability, by integrating the circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12921976A JPS5353908A (en) | 1976-10-26 | 1976-10-26 | Dial signal selection circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12921976A JPS5353908A (en) | 1976-10-26 | 1976-10-26 | Dial signal selection circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5353908A true JPS5353908A (en) | 1978-05-16 |
Family
ID=15004075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12921976A Pending JPS5353908A (en) | 1976-10-26 | 1976-10-26 | Dial signal selection circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5353908A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS581393A (en) * | 1981-06-26 | 1983-01-06 | Fujitsu Ltd | Signal receiving circuit |
-
1976
- 1976-10-26 JP JP12921976A patent/JPS5353908A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS581393A (en) * | 1981-06-26 | 1983-01-06 | Fujitsu Ltd | Signal receiving circuit |
JPS632400B2 (en) * | 1981-06-26 | 1988-01-19 | Fujitsu Ltd |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS52153651A (en) | Gain changing circuit | |
JPS52124810A (en) | Information transmission | |
JPS5339811A (en) | High frequency amplifier circuit | |
JPS5353908A (en) | Dial signal selection circuit | |
JPS52149934A (en) | Cyclic code arithmetic circuit | |
JPS5313393A (en) | Display unit | |
JPS534411A (en) | Mxier circuit | |
JPS52153303A (en) | Data reception circuit | |
JPS5227663A (en) | Multi-function electronic timepiece | |
JPS5323257A (en) | Phase difference detection circuit | |
JPS5276867A (en) | Signal holding circuit | |
JPS5366310A (en) | Tone signal detecting circuit | |
JPS5341945A (en) | Data reading circuit | |
JPS52126109A (en) | Line signal watch circuit | |
JPS52127266A (en) | Digital electronic watch | |
JPS535558A (en) | Switch circuit with chattering preventing function | |
JPS5224412A (en) | Receiver | |
JPS5211067A (en) | Electronic disital clockwork | |
JPS52148169A (en) | Watch fitted with calculator | |
JPS5380942A (en) | Filter circuit | |
JPS5361243A (en) | 1-chip arithmetic circuit device | |
JPS5363801A (en) | Call signal receiving unit | |
JPS52135619A (en) | Input unit | |
JPS52109847A (en) | Digital filter | |
JPS5244101A (en) | Channel station selection circuit |