JPS6473994A - Key telephone system - Google Patents

Key telephone system

Info

Publication number
JPS6473994A
JPS6473994A JP22979787A JP22979787A JPS6473994A JP S6473994 A JPS6473994 A JP S6473994A JP 22979787 A JP22979787 A JP 22979787A JP 22979787 A JP22979787 A JP 22979787A JP S6473994 A JPS6473994 A JP S6473994A
Authority
JP
Japan
Prior art keywords
talking
trunk line
line
conference
voice data
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
JP22979787A
Other languages
Japanese (ja)
Inventor
Hiroshi Mano
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
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 filed Critical Toshiba Corp
Priority to JP22979787A priority Critical patent/JPS6473994A/en
Publication of JPS6473994A publication Critical patent/JPS6473994A/en
Pending legal-status Critical Current

Links

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  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To realize small size and low cost by utilizing a conference arithmetic circuit equipped as the standard to a conventional key telephone master set so as to amplifying a talking level at trunk line transfer thereby obtaining a proper talking level. CONSTITUTION:In the talking between trunk lines by trunk line transfer, a voice data from one trunk line is inputted to the conference operation means 6 through plural channels of an input talking line of the means 6 as voice data from plural talking parties. Since the conference arithmetic means 6 adopts the summing system and adds each voice data of the plural channels and gives the result to an output talking line, the voice data from one trunk line is amplified to an integral multiple and given to the output talking line and sent to an opposite trunk line. Thus, in setting the channel number to a proper number, the proper voice level for inter-trunk line talking is obtained, and since the conference arithmetic means is equipped as a standard to the conventional key telephone set 1, no special hardware is required to be added.
JP22979787A 1987-09-16 1987-09-16 Key telephone system Pending JPS6473994A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22979787A JPS6473994A (en) 1987-09-16 1987-09-16 Key telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22979787A JPS6473994A (en) 1987-09-16 1987-09-16 Key telephone system

Publications (1)

Publication Number Publication Date
JPS6473994A true JPS6473994A (en) 1989-03-20

Family

ID=16897824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22979787A Pending JPS6473994A (en) 1987-09-16 1987-09-16 Key telephone system

Country Status (1)

Country Link
JP (1) JPS6473994A (en)

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