JPS56146351A - Conference telephone system of conference earth number extension type - Google Patents

Conference telephone system of conference earth number extension type

Info

Publication number
JPS56146351A
JPS56146351A JP5015780A JP5015780A JPS56146351A JP S56146351 A JPS56146351 A JP S56146351A JP 5015780 A JP5015780 A JP 5015780A JP 5015780 A JP5015780 A JP 5015780A JP S56146351 A JPS56146351 A JP S56146351A
Authority
JP
Japan
Prior art keywords
subscriber
conference
exchange
trunk
caught
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
JP5015780A
Other languages
Japanese (ja)
Inventor
Saburo Ikeda
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP5015780A priority Critical patent/JPS56146351A/en
Publication of JPS56146351A publication Critical patent/JPS56146351A/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

Landscapes

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

Abstract

PURPOSE:To extend the conference earth number, by providing the conference trunks storing a terminal at the outgoing side and two terminals at the incoming side respectively of the exchange network. CONSTITUTION:The subscriber A dials the number of the subscriber B. The outgoing trunk OGT is caught, and the information is supplied to the control device of the exchange storing the subscriber B via the incoming trunk ICT. When the conference telephone connection information 34 is detected, the conference trunk CFT is caught to secure a connection to the trunk ICT. In such a way, the subscriber A is connected to the subscriber B. Then subscriber B performs a hooking to increase the members of the conference, and thus the subscriber terminal stored in an exchange switch is caught. Under these conditions, the subscriber B dials the subscriber C. As a result, the exchange to which the subscriber C belongs is connected to the exchange to which the subscriber B belongs to secure the participation in the conference.
JP5015780A 1980-04-15 1980-04-15 Conference telephone system of conference earth number extension type Pending JPS56146351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5015780A JPS56146351A (en) 1980-04-15 1980-04-15 Conference telephone system of conference earth number extension type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5015780A JPS56146351A (en) 1980-04-15 1980-04-15 Conference telephone system of conference earth number extension type

Publications (1)

Publication Number Publication Date
JPS56146351A true JPS56146351A (en) 1981-11-13

Family

ID=12851348

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5015780A Pending JPS56146351A (en) 1980-04-15 1980-04-15 Conference telephone system of conference earth number extension type

Country Status (1)

Country Link
JP (1) JPS56146351A (en)

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