JPS5225508A - Digital conference call unit - Google Patents

Digital conference call unit

Info

Publication number
JPS5225508A
JPS5225508A JP10151275A JP10151275A JPS5225508A JP S5225508 A JPS5225508 A JP S5225508A JP 10151275 A JP10151275 A JP 10151275A JP 10151275 A JP10151275 A JP 10151275A JP S5225508 A JPS5225508 A JP S5225508A
Authority
JP
Japan
Prior art keywords
conference call
call unit
digital conference
digital
economized
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
JP10151275A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5729896B2 (enExample
Inventor
Yoji Fukinuki
Shiro Kikuchi
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP10151275A priority Critical patent/JPS5225508A/ja
Publication of JPS5225508A publication Critical patent/JPS5225508A/ja
Publication of JPS5729896B2 publication Critical patent/JPS5729896B2/ja
Granted 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
    • H04M3/561—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities by multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
JP10151275A 1975-08-21 1975-08-21 Digital conference call unit Granted JPS5225508A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10151275A JPS5225508A (en) 1975-08-21 1975-08-21 Digital conference call unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10151275A JPS5225508A (en) 1975-08-21 1975-08-21 Digital conference call unit

Publications (2)

Publication Number Publication Date
JPS5225508A true JPS5225508A (en) 1977-02-25
JPS5729896B2 JPS5729896B2 (enExample) 1982-06-25

Family

ID=14302605

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10151275A Granted JPS5225508A (en) 1975-08-21 1975-08-21 Digital conference call unit

Country Status (1)

Country Link
JP (1) JPS5225508A (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS555502A (en) * 1978-06-28 1980-01-16 Fujitsu Ltd Audio packet conference telehone system
JPS59196642A (ja) * 1983-04-23 1984-11-08 Nippon Telegr & Teleph Corp <Ntt> デイジタル会議電話秘話装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51149711A (en) * 1975-06-18 1976-12-22 Oki Electric Ind Co Ltd Conference telephone system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51149711A (en) * 1975-06-18 1976-12-22 Oki Electric Ind Co Ltd Conference telephone system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS555502A (en) * 1978-06-28 1980-01-16 Fujitsu Ltd Audio packet conference telehone system
JPS59196642A (ja) * 1983-04-23 1984-11-08 Nippon Telegr & Teleph Corp <Ntt> デイジタル会議電話秘話装置

Also Published As

Publication number Publication date
JPS5729896B2 (enExample) 1982-06-25

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