JPS5862956A - Incoming tone transmitting circuit for button telephone set - Google Patents

Incoming tone transmitting circuit for button telephone set

Info

Publication number
JPS5862956A
JPS5862956A JP16175281A JP16175281A JPS5862956A JP S5862956 A JPS5862956 A JP S5862956A JP 16175281 A JP16175281 A JP 16175281A JP 16175281 A JP16175281 A JP 16175281A JP S5862956 A JPS5862956 A JP S5862956A
Authority
JP
Japan
Prior art keywords
incoming tone
channel
circuit
incoming
telephone set
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
JP16175281A
Other versions
JPS6354278B2 (en
Inventor
Kenichi Ishii
Tsuneji Kimeda
Teruyuki Kubo
Shinichi Mori
Yuichi Yamazaki
Original Assignee
Nippon Telegr & Teleph Corp <Ntt>
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 Nippon Telegr & Teleph Corp <Ntt> filed Critical Nippon Telegr & Teleph Corp <Ntt>
Priority to JP56161752A priority Critical patent/JPS6354278B2/ja
Publication of JPS5862956A publication Critical patent/JPS5862956A/en
Publication of JPS6354278B2 publication Critical patent/JPS6354278B2/ja
Application status is Expired legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Interconnection arrangements not involving centralised switching
    • H04M9/08Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic

Abstract

PURPOSE:To eliminate unpleasant feeling to a caller, by outputting an incoming tone during loudspeaker reception and preventing unnecessary signals on a channel, through the mixing of the incoming tone signal of a small sound volume to a speaker circuit for the incoming call during the loudspeaker reception. CONSTITUTION:A main device ME is connected to a button telephone set KT via a pair of channels SL and a pair of control lines DL and this main device ME performs the call with external line wires and with other button telephone sets. The channel circuit SC of the telephone set KT is connected to a handset HD and a hook switch HS, and the channel SL is switched to the switch HS and a coupling transformer T with a changeover relay SR between the switch HS and the channel SL. A control circuit CK connected to the control line DL controls an incoming tone source circuit OSC and an attenuation circuit ATT, mixes an incoming tone signal of a small sound volume to the incoming call during the loudspeaker reception with a speaker circuit LS to output the incoming tone. The mixing of unnecessary signals to the channel SL is prevented and the unpleasant feeling to a caller is eliminated.
JP56161752A 1981-10-09 1981-10-09 Expired JPS6354278B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56161752A JPS6354278B2 (en) 1981-10-09 1981-10-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56161752A JPS6354278B2 (en) 1981-10-09 1981-10-09

Publications (2)

Publication Number Publication Date
JPS5862956A true JPS5862956A (en) 1983-04-14
JPS6354278B2 JPS6354278B2 (en) 1988-10-27

Family

ID=15741209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56161752A Expired JPS6354278B2 (en) 1981-10-09 1981-10-09

Country Status (1)

Country Link
JP (1) JPS6354278B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8594316B2 (en) 2005-08-29 2013-11-26 Nec Infrontia Corporation Voice call system adapted to support a computer terminal and that adjusts a ringer tone

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49106704A (en) * 1973-02-10 1974-10-09
JPS5435604A (en) * 1977-08-25 1979-03-15 Toshiba Corp Ringing system of push-button telephone set
JPS5611555U (en) * 1979-07-06 1981-01-31

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5611555B2 (en) * 1973-07-16 1981-03-14

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49106704A (en) * 1973-02-10 1974-10-09
JPS5435604A (en) * 1977-08-25 1979-03-15 Toshiba Corp Ringing system of push-button telephone set
JPS5611555U (en) * 1979-07-06 1981-01-31

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8594316B2 (en) 2005-08-29 2013-11-26 Nec Infrontia Corporation Voice call system adapted to support a computer terminal and that adjusts a ringer tone

Also Published As

Publication number Publication date
JPS6354278B2 (en) 1988-10-27

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