JPS56156080A - Transmitting system of multifrequency signal - Google Patents

Transmitting system of multifrequency signal

Info

Publication number
JPS56156080A
JPS56156080A JP5973780A JP5973780A JPS56156080A JP S56156080 A JPS56156080 A JP S56156080A JP 5973780 A JP5973780 A JP 5973780A JP 5973780 A JP5973780 A JP 5973780A JP S56156080 A JPS56156080 A JP S56156080A
Authority
JP
Japan
Prior art keywords
multifrequency signal
digital
trunk
sent
analog signals
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
JP5973780A
Other languages
Japanese (ja)
Inventor
Masahiko Yamamoto
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 JP5973780A priority Critical patent/JPS56156080A/en
Publication of JPS56156080A publication Critical patent/JPS56156080A/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
    • H04Q1/457—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
    • H04Q1/4575—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 which are transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

PURPOSE:To transmit a multifrequency signal, by digitizing every multifrequency signal corresponding to each code and connecting the output of said digitized signal to a channel at the prescribed incoming side of a digital time-division switch. CONSTITUTION:The analog signals of the generating circuits 1-A, B and C that produce the push-button signals 1-0 are converted into the digital codes through the coding circuits 11-1A...1C respectively. The digitized outputs of these coding circuits are connected to the incoming side channels IC1-ICA, -ICC of a digital time-division switch 200. Then the address information of a corresponding channel memory 201 is written into the address corresponding to the trunk of a call holding memory 202 from a control part 100 and with every digit. Thus the above-mentioned digital outputs are sent to a decoding circuit 21 and then decoded to the analog signals to be sent to the trunk.
JP5973780A 1980-05-06 1980-05-06 Transmitting system of multifrequency signal Pending JPS56156080A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5973780A JPS56156080A (en) 1980-05-06 1980-05-06 Transmitting system of multifrequency signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5973780A JPS56156080A (en) 1980-05-06 1980-05-06 Transmitting system of multifrequency signal

Publications (1)

Publication Number Publication Date
JPS56156080A true JPS56156080A (en) 1981-12-02

Family

ID=13121819

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5973780A Pending JPS56156080A (en) 1980-05-06 1980-05-06 Transmitting system of multifrequency signal

Country Status (1)

Country Link
JP (1) JPS56156080A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62208791A (en) * 1986-03-10 1987-09-14 Hitachi Ltd Digital signal trunk
JPS6327191A (en) * 1986-07-18 1988-02-04 Sanyo Electric Co Ltd Pb signal transmitting method for private digital electronic exchange

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62208791A (en) * 1986-03-10 1987-09-14 Hitachi Ltd Digital signal trunk
JPS6327191A (en) * 1986-07-18 1988-02-04 Sanyo Electric Co Ltd Pb signal transmitting method for private digital electronic exchange

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