JPS57185755A - Subscriber response detecting system - Google Patents

Subscriber response detecting system

Info

Publication number
JPS57185755A
JPS57185755A JP7041581A JP7041581A JPS57185755A JP S57185755 A JPS57185755 A JP S57185755A JP 7041581 A JP7041581 A JP 7041581A JP 7041581 A JP7041581 A JP 7041581A JP S57185755 A JPS57185755 A JP S57185755A
Authority
JP
Japan
Prior art keywords
callout
circuit
signal
signal transmission
control
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
JP7041581A
Other languages
Japanese (ja)
Inventor
Katsuzo Yamada
Toshio Arai
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP7041581A priority Critical patent/JPS57185755A/en
Publication of JPS57185755A publication Critical patent/JPS57185755A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/02—Calling substations, e.g. by ringing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To increase the reliability of a callout signal transmission switch, by economizing the system through the commonly installed callout response detection circuit and reducing circuit noise through the periodical transmission control of a callout signal for the zero phase of voltage and current. CONSTITUTION:A subscriber circuit control circuit (not shown) writes a callout signal transmission instruction to a control information storage register CREG according to the intermission. A callout response detection control circuit RTCTL provided corresponding to a subscriber drives a callout signal transmission relay RNG via a callout signal transmission control flip-flop RNGF with a signal from a zero phase detection circuit RCD and the information in the said CREG and transmits a callout signal 10 to a called party SUB. A response detection circuit RT commonly provided with a callout signal line resets the RNGF of all the RTCTLs during the callout operation for a prescribed time when one of a number of called parties during callout responds, and interrupts the transmission of the callout signal. During that time, a communication current supply/loop monitor circuit BS transmits the responded called party information to a monitor circuit.
JP7041581A 1981-05-11 1981-05-11 Subscriber response detecting system Pending JPS57185755A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7041581A JPS57185755A (en) 1981-05-11 1981-05-11 Subscriber response detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7041581A JPS57185755A (en) 1981-05-11 1981-05-11 Subscriber response detecting system

Publications (1)

Publication Number Publication Date
JPS57185755A true JPS57185755A (en) 1982-11-16

Family

ID=13430811

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7041581A Pending JPS57185755A (en) 1981-05-11 1981-05-11 Subscriber response detecting system

Country Status (1)

Country Link
JP (1) JPS57185755A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63238756A (en) * 1986-11-13 1988-10-04 エスジーエス・マイクロエレットロニカ・エス・ピー・エー Telephone circuit
JPH01248740A (en) * 1988-03-29 1989-10-04 Nec Corp Ring trip detection system
US5002934A (en) * 1986-11-24 1991-03-26 Van Den Bergh Foods Co., Division Of Conopco, Inc. Aqueous gel comprising carrageenan
JPH0946417A (en) * 1995-07-28 1997-02-14 Nec Corp Ring trip circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63238756A (en) * 1986-11-13 1988-10-04 エスジーエス・マイクロエレットロニカ・エス・ピー・エー Telephone circuit
US5002934A (en) * 1986-11-24 1991-03-26 Van Den Bergh Foods Co., Division Of Conopco, Inc. Aqueous gel comprising carrageenan
JPH01248740A (en) * 1988-03-29 1989-10-04 Nec Corp Ring trip detection system
JPH0946417A (en) * 1995-07-28 1997-02-14 Nec Corp Ring trip circuit

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