JPS52122009A - Busy-tone signal sending - Google Patents

Busy-tone signal sending

Info

Publication number
JPS52122009A
JPS52122009A JP3838676A JP3838676A JPS52122009A JP S52122009 A JPS52122009 A JP S52122009A JP 3838676 A JP3838676 A JP 3838676A JP 3838676 A JP3838676 A JP 3838676A JP S52122009 A JPS52122009 A JP S52122009A
Authority
JP
Japan
Prior art keywords
busy
signal sending
tone signal
busyflash
indicate
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
JP3838676A
Other languages
Japanese (ja)
Inventor
Satoshi Inoue
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 JP3838676A priority Critical patent/JPS52122009A/en
Publication of JPS52122009A publication Critical patent/JPS52122009A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator

Landscapes

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

Abstract

PURPOSE:To indicate the busy to B board economically by providing the busyflash signal sending circuit in the busy tone trunk.
JP3838676A 1976-04-06 1976-04-06 Busy-tone signal sending Pending JPS52122009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3838676A JPS52122009A (en) 1976-04-06 1976-04-06 Busy-tone signal sending

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3838676A JPS52122009A (en) 1976-04-06 1976-04-06 Busy-tone signal sending

Publications (1)

Publication Number Publication Date
JPS52122009A true JPS52122009A (en) 1977-10-13

Family

ID=12523829

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3838676A Pending JPS52122009A (en) 1976-04-06 1976-04-06 Busy-tone signal sending

Country Status (1)

Country Link
JP (1) JPS52122009A (en)

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