JPS56109065A - Selective callout system by push button telephone set - Google Patents

Selective callout system by push button telephone set

Info

Publication number
JPS56109065A
JPS56109065A JP1123580A JP1123580A JPS56109065A JP S56109065 A JPS56109065 A JP S56109065A JP 1123580 A JP1123580 A JP 1123580A JP 1123580 A JP1123580 A JP 1123580A JP S56109065 A JPS56109065 A JP S56109065A
Authority
JP
Japan
Prior art keywords
push buttons
signal
oscillator
utl
sbs
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.)
Granted
Application number
JP1123580A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6232863B2 (enrdf_load_stackoverflow
Inventor
Sadao Ifukuro
Tetsuo Sawada
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.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP1123580A priority Critical patent/JPS56109065A/ja
Publication of JPS56109065A publication Critical patent/JPS56109065A/ja
Publication of JPS6232863B2 publication Critical patent/JPS6232863B2/ja
Granted 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
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
JP1123580A 1980-02-01 1980-02-01 Selective callout system by push button telephone set Granted JPS56109065A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1123580A JPS56109065A (en) 1980-02-01 1980-02-01 Selective callout system by push button telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1123580A JPS56109065A (en) 1980-02-01 1980-02-01 Selective callout system by push button telephone set

Publications (2)

Publication Number Publication Date
JPS56109065A true JPS56109065A (en) 1981-08-29
JPS6232863B2 JPS6232863B2 (enrdf_load_stackoverflow) 1987-07-17

Family

ID=11772267

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1123580A Granted JPS56109065A (en) 1980-02-01 1980-02-01 Selective callout system by push button telephone set

Country Status (1)

Country Link
JP (1) JPS56109065A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH067511U (ja) * 1992-01-06 1994-02-01 美佐子 佐藤 装飾体

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021182598A1 (ja) 2020-03-13 2021-09-16 三菱ケミカル株式会社 導光板、及びａｒディスプレイ

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5125003A (enrdf_load_stackoverflow) * 1974-06-27 1976-03-01 Sutotsuku Purodakuchion Spa

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5125003A (enrdf_load_stackoverflow) * 1974-06-27 1976-03-01 Sutotsuku Purodakuchion Spa

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH067511U (ja) * 1992-01-06 1994-02-01 美佐子 佐藤 装飾体

Also Published As

Publication number Publication date
JPS6232863B2 (enrdf_load_stackoverflow) 1987-07-17

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