JPS57147367A - Conference trunk - Google Patents

Conference trunk

Info

Publication number
JPS57147367A
JPS57147367A JP3252281A JP3252281A JPS57147367A JP S57147367 A JPS57147367 A JP S57147367A JP 3252281 A JP3252281 A JP 3252281A JP 3252281 A JP3252281 A JP 3252281A JP S57147367 A JPS57147367 A JP S57147367A
Authority
JP
Japan
Prior art keywords
telephone
conference
calling
connection
operator
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
JP3252281A
Other languages
Japanese (ja)
Inventor
Goro Hanada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3252281A priority Critical patent/JPS57147367A/en
Publication of JPS57147367A publication Critical patent/JPS57147367A/en
Pending 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
    • 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
    • H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
    • H04M3/51—Centralised call answering arrangements requiring operator intervention, e.g. call or contact centers for telemarketing
    • H04M3/5133—Operator terminal details

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To increase the service properties for the connection of the conference telephone with a private telephone switchboard, by carrying out the calling and connection for the persons called to the conferecnce with the intervention and operation of an operator of the attendant board. CONSTITUTION:When a specific dial signal alotted to the call of a conferecnce is transmitted from an extension telephone set 3, a switchboard controller 1 sets the channel of a switch network 2 to connect the telephone 3 to a calling channel terminal Z of a conference trunk 8. The telephone 3 is connected to an attendant board 5 via the trunk 8 and an operator calling circuit 6 to inform the operator the names, telephone Nos., etc. of the conference attendants for calling to the conference. The operator controls an operator circuit 7 through the board 5 to carry out the calling and connection of an extension telephone 3A and then connects the telephone 3A to the trunk 8. In the same way, the calling and connection is given to an extension telephone B. Thus the connection is performed to the conference. In such way, the load is reduced for the person who calls a conference to increase the conference telephone service.
JP3252281A 1981-03-09 1981-03-09 Conference trunk Pending JPS57147367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3252281A JPS57147367A (en) 1981-03-09 1981-03-09 Conference trunk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3252281A JPS57147367A (en) 1981-03-09 1981-03-09 Conference trunk

Publications (1)

Publication Number Publication Date
JPS57147367A true JPS57147367A (en) 1982-09-11

Family

ID=12361285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3252281A Pending JPS57147367A (en) 1981-03-09 1981-03-09 Conference trunk

Country Status (1)

Country Link
JP (1) JPS57147367A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59158166A (en) * 1983-02-25 1984-09-07 Nippon Telegr & Teleph Corp <Ntt> Conference telephone connecting device
JPS60142660A (en) * 1983-12-29 1985-07-27 Nec Corp Conference telephone system of digital electronic private branch exchange

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59158166A (en) * 1983-02-25 1984-09-07 Nippon Telegr & Teleph Corp <Ntt> Conference telephone connecting device
JPS60142660A (en) * 1983-12-29 1985-07-27 Nec Corp Conference telephone system of digital electronic private branch exchange

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