JPS5685963A - Called line indicating circuit of telephone set - Google Patents

Called line indicating circuit of telephone set

Info

Publication number
JPS5685963A
JPS5685963A JP16300079A JP16300079A JPS5685963A JP S5685963 A JPS5685963 A JP S5685963A JP 16300079 A JP16300079 A JP 16300079A JP 16300079 A JP16300079 A JP 16300079A JP S5685963 A JPS5685963 A JP S5685963A
Authority
JP
Japan
Prior art keywords
time
incoming
elapsed
tone
seconds
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
JP16300079A
Other languages
Japanese (ja)
Inventor
Teruaki Kitagawa
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 JP16300079A priority Critical patent/JPS5685963A/en
Publication of JPS5685963A publication Critical patent/JPS5685963A/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 elevate the function of a telephone set by constituting it so that a telephone operator can easily decide the elapsed time from incoming, by varying the incoming indicator tone as time elapses, in the key telephone system. CONSTITUTION:When a call signal from the PBX circuit 1 is detected by the call signal detection circuit 3, the switching circuit 6 conducts by the output of the timer circuit 5 for 6 seconds after the time of detection, a tone signal of the tone generator 11 is sent out to the speaker 17 of the key telephone set 14, and the incoming indication is executed. Subsequently, from the time when 7 seconds have elapsed to the time when 12 seconds have elapsed, and after 13 seconds have elapsed, the switches 7, 8 conduct, respectively, the incoming indication is executed by the tone signals of the tone generators 12, 13, and therefore, a telephone operator decides the elapsed time of incoming from circuits, and is able to answer to the earliest circuit.
JP16300079A 1979-12-14 1979-12-14 Called line indicating circuit of telephone set Pending JPS5685963A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16300079A JPS5685963A (en) 1979-12-14 1979-12-14 Called line indicating circuit of telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16300079A JPS5685963A (en) 1979-12-14 1979-12-14 Called line indicating circuit of telephone set

Publications (1)

Publication Number Publication Date
JPS5685963A true JPS5685963A (en) 1981-07-13

Family

ID=15765286

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16300079A Pending JPS5685963A (en) 1979-12-14 1979-12-14 Called line indicating circuit of telephone set

Country Status (1)

Country Link
JP (1) JPS5685963A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60165155A (en) * 1984-02-07 1985-08-28 Nec Corp Call signal control system
JPS6167395A (en) * 1984-09-11 1986-04-07 Matsushita Electric Ind Co Ltd Telephone set

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60165155A (en) * 1984-02-07 1985-08-28 Nec Corp Call signal control system
JPS6167395A (en) * 1984-09-11 1986-04-07 Matsushita Electric Ind Co Ltd Telephone set

Similar Documents

Publication Publication Date Title
JPS5469905A (en) Answering system for call signal of automatic answering telephone set
JPS5685963A (en) Called line indicating circuit of telephone set
JPS5564465A (en) Automatic answering telephone set
JPS5556753A (en) Emergency informing system
JPS53132968A (en) Switch circuit
JPS5451702A (en) Automatic power supply cut-off circuit
JPS5792928A (en) Echo cancelling device
JPS5591252A (en) Automatic answering telephone set
JPS53117922A (en) Absence reception voice answer skip system
JPS55151841A (en) Recorder for telephone call information
JPS5461808A (en) Audio response unit
JPS5733843A (en) Echo cancelling device
JPS648755A (en) Conference communication equipment
JPS5423406A (en) Incoming replay detecting system
JPS5737961A (en) Testing data generating equipment
JPS5793761A (en) Telephone automatic response device
JPS5630355A (en) Call selection system of terminal equipment
JPS57131067A (en) Trigger circuit for signal waveform observing device
JPS53122307A (en) Automatic answering telephone set
JPS5563162A (en) Subscriber line call signal transmission system
JPS5541017A (en) Telephone set
JPS5513541A (en) Channel unit
GB1418085A (en) Circuit arrangement for generating prefix signals in telecommuni cation and particularly telephone systems
JPS53136414A (en) Sending system for subscriber's line signal
JPS57113670A (en) Telephone set