JPS5353908A - Dial signal selection circuit - Google Patents

Dial signal selection circuit

Info

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
Application number
JP12921976A
Other languages
Japanese (ja)
Inventor
Hideto Miyamoto
Hidemi Kuramitsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP12921976A priority Critical patent/JPS5353908A/en
Publication of JPS5353908A publication Critical patent/JPS5353908A/en
Pending legal-status Critical Current

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

Abstract

PURPOSE:To make small the circuit inn size, to reduce the cost, and to improve the reliability, by integrating the circuit.
JP12921976A 1976-10-26 1976-10-26 Dial signal selection circuit Pending JPS5353908A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS581393A (en) * 1981-06-26 1983-01-06 Fujitsu Ltd Signal receiving circuit

Cited By (2)

* Cited by examiner, † Cited by third party
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