JPS53112006A - Reception circuit for multi-frequency signal in telephone exchanger or the like - Google Patents

Reception circuit for multi-frequency signal in telephone exchanger or the like

Info

Publication number
JPS53112006A
JPS53112006A JP2664177A JP2664177A JPS53112006A JP S53112006 A JPS53112006 A JP S53112006A JP 2664177 A JP2664177 A JP 2664177A JP 2664177 A JP2664177 A JP 2664177A JP S53112006 A JPS53112006 A JP S53112006A
Authority
JP
Japan
Prior art keywords
frequency signal
reception circuit
telephone exchanger
signal
exchanger
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
JP2664177A
Other languages
Japanese (ja)
Inventor
Kiyoshi Takemori
Yasuhiko Miwata
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 JP2664177A priority Critical patent/JPS53112006A/en
Publication of JPS53112006A publication Critical patent/JPS53112006A/en
Pending legal-status Critical Current

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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)

Abstract

PURPOSE:To make easy integration, by performing the signal selection with the filters of the same constitution indepently of channel, through the utilization of the signal having the same frequency as the signal received as the reference signal.
JP2664177A 1977-03-11 1977-03-11 Reception circuit for multi-frequency signal in telephone exchanger or the like Pending JPS53112006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2664177A JPS53112006A (en) 1977-03-11 1977-03-11 Reception circuit for multi-frequency signal in telephone exchanger or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2664177A JPS53112006A (en) 1977-03-11 1977-03-11 Reception circuit for multi-frequency signal in telephone exchanger or the like

Publications (1)

Publication Number Publication Date
JPS53112006A true JPS53112006A (en) 1978-09-30

Family

ID=12199067

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2664177A Pending JPS53112006A (en) 1977-03-11 1977-03-11 Reception circuit for multi-frequency signal in telephone exchanger or the like

Country Status (1)

Country Link
JP (1) JPS53112006A (en)

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