JPS57185754A - Button telephone device - Google Patents

Button telephone device

Info

Publication number
JPS57185754A
JPS57185754A JP7123981A JP7123981A JPS57185754A JP S57185754 A JPS57185754 A JP S57185754A JP 7123981 A JP7123981 A JP 7123981A JP 7123981 A JP7123981 A JP 7123981A JP S57185754 A JPS57185754 A JP S57185754A
Authority
JP
Japan
Prior art keywords
transmitted
incoming
extension
cpu1
incoming call
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
JP7123981A
Other languages
Japanese (ja)
Inventor
Yoshio Nitta
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 JP7123981A priority Critical patent/JPS57185754A/en
Publication of JPS57185754A publication Critical patent/JPS57185754A/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
    • H04M3/54—Arrangements for diverting calls for one subscriber to another predetermined subscriber

Landscapes

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

Abstract

PURPOSE:To avoid useless operation for the user, by controlling the time of transmission of incoming signals so that a time difference can be given between telephone sets. CONSTITUTION:When an incoming call comes from main trucks alpha<1>-alpha<m>, the incoming call is informed to a CPU1 through an I/O5 from a main trunk interface 7. The CPU1 transmits a control signal to the I/O5 to transmit the incoming signal to a telephone set of a specific extension according to data stored in a random access memory 3 and connects a tone generator 6 to a specific extension via a matrix switch 8. Further, the CPU1 operates a timer 4 simultaneously, and if the selected extension does not respond to the incoming call within a prescribed time, since the incoming signal is transmitted to an extension to be transmitted next, a control signal is transmitted to the I/O5. Similarly, the incoming signal is transmitted to the next extension from the tone generator 6.
JP7123981A 1981-05-12 1981-05-12 Button telephone device Pending JPS57185754A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7123981A JPS57185754A (en) 1981-05-12 1981-05-12 Button telephone device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7123981A JPS57185754A (en) 1981-05-12 1981-05-12 Button telephone device

Publications (1)

Publication Number Publication Date
JPS57185754A true JPS57185754A (en) 1982-11-16

Family

ID=13454941

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7123981A Pending JPS57185754A (en) 1981-05-12 1981-05-12 Button telephone device

Country Status (1)

Country Link
JP (1) JPS57185754A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60248096A (en) * 1984-05-24 1985-12-07 Fujitsu Ltd Delay call system
JPS63263994A (en) * 1987-04-22 1988-10-31 Sekisui Chem Co Ltd Telephone system
JPS6418345A (en) * 1987-07-14 1989-01-23 Canon Kk Communication control equipment
JPH04280556A (en) * 1991-03-08 1992-10-06 Matsushita Electric Ind Co Ltd Telephone system
JP2022120433A (en) * 2021-02-05 2022-08-18 Ｎｅｃプラットフォームズ株式会社 Exchange, telephone system, telephone exchange method, and program

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60248096A (en) * 1984-05-24 1985-12-07 Fujitsu Ltd Delay call system
JPS63263994A (en) * 1987-04-22 1988-10-31 Sekisui Chem Co Ltd Telephone system
JPS6418345A (en) * 1987-07-14 1989-01-23 Canon Kk Communication control equipment
JPH04280556A (en) * 1991-03-08 1992-10-06 Matsushita Electric Ind Co Ltd Telephone system
JP2022120433A (en) * 2021-02-05 2022-08-18 Ｎｅｃプラットフォームズ株式会社 Exchange, telephone system, telephone exchange method, and program

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