JPS5460809A - Call-back system - Google Patents

Call-back system

Info

Publication number
JPS5460809A
JPS5460809A JP12801777A JP12801777A JPS5460809A JP S5460809 A JPS5460809 A JP S5460809A JP 12801777 A JP12801777 A JP 12801777A JP 12801777 A JP12801777 A JP 12801777A JP S5460809 A JPS5460809 A JP S5460809A
Authority
JP
Japan
Prior art keywords
caller
called subscriber
subscriber
busy
cpe
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
JP12801777A
Other languages
Japanese (ja)
Inventor
Haruo Yanagi
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 JP12801777A priority Critical patent/JPS5460809A/en
Publication of JPS5460809A publication Critical patent/JPS5460809A/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)

Abstract

PURPOSE:To lessen the load of the caller as well as to decrease the ineffective exchange traffic by memorizing the necessary information by the special instruction of the caller when the called subscriber is busy. CONSTITUTION:When caller A gives a call to called subscriber B when he is busy, central control unit CPE connects caller A to called subscriber busy tone transmission trunk SBTT. When caller A requests the automatic call-back service via hooking and the like, the request is detected by CPE via scanner SCN. And CPE transmits the confirmation signal to caller A and then stores the necessary information including the numbers of the caller and the called subscriber and others into memory MEM. The state of subscriber B is checked every fixed time, and the connection becomes possible between caller A and subscriber B when the line becomes free.
JP12801777A 1977-10-24 1977-10-24 Call-back system Pending JPS5460809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12801777A JPS5460809A (en) 1977-10-24 1977-10-24 Call-back system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12801777A JPS5460809A (en) 1977-10-24 1977-10-24 Call-back system

Publications (1)

Publication Number Publication Date
JPS5460809A true JPS5460809A (en) 1979-05-16

Family

ID=14974416

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12801777A Pending JPS5460809A (en) 1977-10-24 1977-10-24 Call-back system

Country Status (1)

Country Link
JP (1) JPS5460809A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55163600A (en) * 1979-06-07 1980-12-19 Hitachi Ltd Voice response system
JPH05244294A (en) * 1992-02-27 1993-09-21 Nec Corp Private electronic branch exchange

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55163600A (en) * 1979-06-07 1980-12-19 Hitachi Ltd Voice response system
JPH05244294A (en) * 1992-02-27 1993-09-21 Nec Corp Private electronic branch exchange

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