JPS55107373A - Meeting communication system - Google Patents

Meeting communication system

Info

Publication number
JPS55107373A
JPS55107373A JP1445679A JP1445679A JPS55107373A JP S55107373 A JPS55107373 A JP S55107373A JP 1445679 A JP1445679 A JP 1445679A JP 1445679 A JP1445679 A JP 1445679A JP S55107373 A JPS55107373 A JP S55107373A
Authority
JP
Japan
Prior art keywords
exchanger
line
output
terminal
audio
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
JP1445679A
Other languages
Japanese (ja)
Other versions
JPS5925505B2 (en
Inventor
Shigeru Aoyama
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1445679A priority Critical patent/JPS5925505B2/en
Publication of JPS55107373A publication Critical patent/JPS55107373A/en
Publication of JPS5925505B2 publication Critical patent/JPS5925505B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To enable to decrease the number of required relay lines, by mixing the audio signal incoming via the relay line with the audio signal from the telephone set in direct allocation to the exchanger at the audio mixer and sending the output to the next stage exchanger. CONSTITUTION:The audio signal mixture fed from the pre-stage exchanger, e.g., 1A on the relay line 11 is given to the 4-line input terminal 9 and the 4-line output line 10 via the next stage exchanger, e.g., the switch circuit of 1B. Further, when the signal on the terminal 12 of the audio mixer 5 of the exchanger B is the mixture of audio from the all conference attended telephone sets 4a...4j, the selector switch 14 is selected to the terminal 12 to send the mixed output to the pre-stage exchanger 1A and the conference attended telephone set in the station. If not, selection is made to the terminal 15 and output is fed to the next stage exchanger, e.g., 1C via the switch circuit network. Thus, the number of required relay lines can be decreased.
JP1445679A 1979-02-09 1979-02-09 Conference call method Expired JPS5925505B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1445679A JPS5925505B2 (en) 1979-02-09 1979-02-09 Conference call method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1445679A JPS5925505B2 (en) 1979-02-09 1979-02-09 Conference call method

Publications (2)

Publication Number Publication Date
JPS55107373A true JPS55107373A (en) 1980-08-18
JPS5925505B2 JPS5925505B2 (en) 1984-06-18

Family

ID=11861536

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1445679A Expired JPS5925505B2 (en) 1979-02-09 1979-02-09 Conference call method

Country Status (1)

Country Link
JP (1) JPS5925505B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57111166A (en) * 1980-12-26 1982-07-10 Fujitsu Ltd Add-on connection system
US4605823A (en) * 1982-11-12 1986-08-12 Fujitsu Limited Phone conference system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57111166A (en) * 1980-12-26 1982-07-10 Fujitsu Ltd Add-on connection system
US4605823A (en) * 1982-11-12 1986-08-12 Fujitsu Limited Phone conference system

Also Published As

Publication number Publication date
JPS5925505B2 (en) 1984-06-18

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