JPS56110376A - Holding state display system of key telephone set - Google Patents

Holding state display system of key telephone set

Info

Publication number
JPS56110376A
JPS56110376A JP1201380A JP1201380A JPS56110376A JP S56110376 A JPS56110376 A JP S56110376A JP 1201380 A JP1201380 A JP 1201380A JP 1201380 A JP1201380 A JP 1201380A JP S56110376 A JPS56110376 A JP S56110376A
Authority
JP
Japan
Prior art keywords
key telephone
circuit
line
holding
display
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.)
Granted
Application number
JP1201380A
Other languages
Japanese (ja)
Other versions
JPH0114757B2 (en
Inventor
Yoshiichi Sano
Taiji Sato
Shinichi Shibata
Takeshi Horiuchi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1201380A priority Critical patent/JPS56110376A/en
Publication of JPS56110376A publication Critical patent/JPS56110376A/en
Publication of JPH0114757B2 publication Critical patent/JPH0114757B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/003—Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment

Abstract

PURPOSE:To easily confirm which line is held when an operator answer again after holding, by allotting a special display mode different from the line display of other key telephone to the line display of a key telephone that is in a holding state. CONSTITUTION:The blink signal of 4Hz is supplied to the key telephone that performed a holding operation of line from the OR circuit 310 from the time t1 to t3. Receiving this blink signal, the light emitting diode 9 performs a blinking display. Then the power is supplied to the amplifier 11 from th OR circuit 10 at and after the time t3 when the time T1 is measured by the timer circuit 304. The amplifier 11 amplifies the signal supplied from the signal oscillator 12 and thus actuates the speaker 13. In such way, the operator can recognize the holding of circuit by the blinking display of the 3rd display mode plus an alarm tone.
JP1201380A 1980-02-05 1980-02-05 Holding state display system of key telephone set Granted JPS56110376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1201380A JPS56110376A (en) 1980-02-05 1980-02-05 Holding state display system of key telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1201380A JPS56110376A (en) 1980-02-05 1980-02-05 Holding state display system of key telephone set

Publications (2)

Publication Number Publication Date
JPS56110376A true JPS56110376A (en) 1981-09-01
JPH0114757B2 JPH0114757B2 (en) 1989-03-14

Family

ID=11793702

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1201380A Granted JPS56110376A (en) 1980-02-05 1980-02-05 Holding state display system of key telephone set

Country Status (1)

Country Link
JP (1) JPS56110376A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59115695A (en) * 1982-12-14 1984-07-04 ミテル・コ−ポレ−シヨン Indicator for telephone set
JPH02262794A (en) * 1989-04-03 1990-10-25 Canon Inc Key telephone system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US26722A (en) * 1860-01-03 James tucker
JPS5242062A (en) * 1975-09-30 1977-04-01 Fujitsu Ltd Timing circuit
JPS5394806A (en) * 1977-01-31 1978-08-19 Nec Corp Alarm display circuit for long-time holding of key telephone set
JPS543503A (en) * 1977-06-10 1979-01-11 Sony Corp Muting device of record players

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US26722A (en) * 1860-01-03 James tucker
JPS5242062A (en) * 1975-09-30 1977-04-01 Fujitsu Ltd Timing circuit
JPS5394806A (en) * 1977-01-31 1978-08-19 Nec Corp Alarm display circuit for long-time holding of key telephone set
JPS543503A (en) * 1977-06-10 1979-01-11 Sony Corp Muting device of record players

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59115695A (en) * 1982-12-14 1984-07-04 ミテル・コ−ポレ−シヨン Indicator for telephone set
JPH02262794A (en) * 1989-04-03 1990-10-25 Canon Inc Key telephone system

Also Published As

Publication number Publication date
JPH0114757B2 (en) 1989-03-14

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