JPS5578660A - Dial pulse confirmation display circuit - Google Patents

Dial pulse confirmation display circuit

Info

Publication number
JPS5578660A
JPS5578660A JP15280678A JP15280678A JPS5578660A JP S5578660 A JPS5578660 A JP S5578660A JP 15280678 A JP15280678 A JP 15280678A JP 15280678 A JP15280678 A JP 15280678A JP S5578660 A JPS5578660 A JP S5578660A
Authority
JP
Japan
Prior art keywords
dial
dial pulse
display unit
dialed
lighting
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
JP15280678A
Other languages
Japanese (ja)
Inventor
Shigeo Yamazaki
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 JP15280678A priority Critical patent/JPS5578660A/en
Publication of JPS5578660A publication Critical patent/JPS5578660A/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
    • H04M1/56—Arrangements for indicating or recording the called number at the calling subscriber's set

Abstract

PURPOSE:To eliminate the handling anxiety for the operator in the dial pulse confirmation system of the push-button telephone set by securing lighting while the digit number dialed is being sent, extinguishing the lighting when the signal transmission is over and at the same time displaying the number transmitted. CONSTITUTION:When the handset is lifted up, hook switches HS1, and HS2 are made to form a loop between the central office and PBX. And when the telephone number is dialed via dial switch PB, the button signals are memorized in transmission circuit PSDL. The digit number is counted up by up-down counter U/D.CT, and then display unit ELED2 glows via driver circuit DRV2. The dial pulse signals are changed parallel through serial-parallel converter circuit SPCG, and the dial number is displayed on display unit DLE1 and via decoder DEC and driver DRV1.
JP15280678A 1978-12-09 1978-12-09 Dial pulse confirmation display circuit Pending JPS5578660A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15280678A JPS5578660A (en) 1978-12-09 1978-12-09 Dial pulse confirmation display circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15280678A JPS5578660A (en) 1978-12-09 1978-12-09 Dial pulse confirmation display circuit

Publications (1)

Publication Number Publication Date
JPS5578660A true JPS5578660A (en) 1980-06-13

Family

ID=15548553

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15280678A Pending JPS5578660A (en) 1978-12-09 1978-12-09 Dial pulse confirmation display circuit

Country Status (1)

Country Link
JP (1) JPS5578660A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6260342A (en) * 1985-09-10 1987-03-17 Rohm Co Ltd Selection signal transmission circuit
JPS62122448A (en) * 1985-11-22 1987-06-03 Toshiba Corp Telephone set

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6260342A (en) * 1985-09-10 1987-03-17 Rohm Co Ltd Selection signal transmission circuit
JPS62122448A (en) * 1985-11-22 1987-06-03 Toshiba Corp Telephone set

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