JPS52129309A - Call back system - Google Patents

Call back system

Info

Publication number
JPS52129309A
JPS52129309A JP4622776A JP4622776A JPS52129309A JP S52129309 A JPS52129309 A JP S52129309A JP 4622776 A JP4622776 A JP 4622776A JP 4622776 A JP4622776 A JP 4622776A JP S52129309 A JPS52129309 A JP S52129309A
Authority
JP
Japan
Prior art keywords
call back
back system
office line
receptionst
extensions
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
JP4622776A
Other languages
Japanese (ja)
Inventor
Juichi Shimamori
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 JP4622776A priority Critical patent/JPS52129309A/en
Publication of JPS52129309A publication Critical patent/JPS52129309A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/48—Arrangements for recalling a calling subscriber when the wanted subscriber ceases to be busy

Landscapes

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

Abstract

PURPOSE:To facilitate call back operation and thus to increase working efficiency of the office line receptionst, by installing simplified call back equipment containing keys corresponding to extensions to the telephone of the office line answers.
JP4622776A 1976-04-23 1976-04-23 Call back system Pending JPS52129309A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4622776A JPS52129309A (en) 1976-04-23 1976-04-23 Call back system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4622776A JPS52129309A (en) 1976-04-23 1976-04-23 Call back system

Publications (1)

Publication Number Publication Date
JPS52129309A true JPS52129309A (en) 1977-10-29

Family

ID=12741212

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4622776A Pending JPS52129309A (en) 1976-04-23 1976-04-23 Call back system

Country Status (1)

Country Link
JP (1) JPS52129309A (en)

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