JPS556929A - Reset call system - Google Patents

Reset call system

Info

Publication number
JPS556929A
JPS556929A JP7928178A JP7928178A JPS556929A JP S556929 A JPS556929 A JP S556929A JP 7928178 A JP7928178 A JP 7928178A JP 7928178 A JP7928178 A JP 7928178A JP S556929 A JPS556929 A JP S556929A
Authority
JP
Japan
Prior art keywords
potential
output
flop
flip
dialing
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
JP7928178A
Other languages
Japanese (ja)
Other versions
JPS6029269B2 (en
Inventor
Yoichiro Sano
Hiroshi Wakabayashi
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu 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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP53079281A priority Critical patent/JPS6029269B2/en
Publication of JPS556929A publication Critical patent/JPS556929A/en
Publication of JPS6029269B2 publication Critical patent/JPS6029269B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To realize an automatic camp-on for the reset call system of the key telephone system by giving redialing without hooking the handset even under the busy state of the extension calling and thus resetting the counter circuit first at the beginning of the redialing. CONSTITUTION:With push-on of the extension key, terminal P2 becomes the (+) potential. Then transistor TR2 is turned on via diode Da plus resistance R1 and R2 to turn the output of B-position circuit BP to the L potential. With dialing the pulse is sent to dial counter citcuit for counting and memorization via TR2, inverter 1 and AND gate 2 each. When the dialing ends, output Q of flip-flop 5 features the H potential. Under the busy state, output Q of flip-flop 3 is also kept at the H potential. With the second dialing, the output of NOR gate 8 becomes the L potential. And thus flip-flop 5 and dial counter circuit CT are reset.
JP53079281A 1978-06-30 1978-06-30 Extension calling method for button telephone equipment Expired JPS6029269B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53079281A JPS6029269B2 (en) 1978-06-30 1978-06-30 Extension calling method for button telephone equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53079281A JPS6029269B2 (en) 1978-06-30 1978-06-30 Extension calling method for button telephone equipment

Publications (2)

Publication Number Publication Date
JPS556929A true JPS556929A (en) 1980-01-18
JPS6029269B2 JPS6029269B2 (en) 1985-07-09

Family

ID=13685472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53079281A Expired JPS6029269B2 (en) 1978-06-30 1978-06-30 Extension calling method for button telephone equipment

Country Status (1)

Country Link
JP (1) JPS6029269B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597544A (en) * 1982-07-01 1984-01-14 Nissan Motor Co Ltd Calculating device of moving quantity of tool approach in machine tool
JPS5964257A (en) * 1982-10-02 1984-04-12 Yamazaki Mazak Corp Method of determining machining start position in numerical-controlled machine tool
JPS5964256A (en) * 1982-09-30 1984-04-12 Yamazaki Mazak Corp Method of determining machining start position in numerical-controlled machine tool
JPS6175404A (en) * 1984-09-20 1986-04-17 Tokico Ltd industrial robot
JPS629816A (en) * 1985-07-05 1987-01-17 Hitachi Ltd broaching machine
JPS6327245U (en) * 1986-07-30 1988-02-23

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597544A (en) * 1982-07-01 1984-01-14 Nissan Motor Co Ltd Calculating device of moving quantity of tool approach in machine tool
JPS5964256A (en) * 1982-09-30 1984-04-12 Yamazaki Mazak Corp Method of determining machining start position in numerical-controlled machine tool
JPS5964257A (en) * 1982-10-02 1984-04-12 Yamazaki Mazak Corp Method of determining machining start position in numerical-controlled machine tool
JPS6175404A (en) * 1984-09-20 1986-04-17 Tokico Ltd industrial robot
JPS629816A (en) * 1985-07-05 1987-01-17 Hitachi Ltd broaching machine
JPS6327245U (en) * 1986-07-30 1988-02-23

Also Published As

Publication number Publication date
JPS6029269B2 (en) 1985-07-09

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