JPH02133045U - - Google Patents

Info

Publication number
JPH02133045U
JPH02133045U JP4046289U JP4046289U JPH02133045U JP H02133045 U JPH02133045 U JP H02133045U JP 4046289 U JP4046289 U JP 4046289U JP 4046289 U JP4046289 U JP 4046289U JP H02133045 U JPH02133045 U JP H02133045U
Authority
JP
Japan
Prior art keywords
main device
telephones
central office
switch circuit
telephone exchange
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
JP4046289U
Other languages
English (en)
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 filed Critical
Priority to JP4046289U priority Critical patent/JPH02133045U/ja
Publication of JPH02133045U publication Critical patent/JPH02133045U/ja
Pending legal-status Critical Current

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Description

【図面の簡単な説明】
第１図は本考案の一実施例を説明するための概
略構成図、第２図は従来例を説明するための概略
構成図。 図中、２０は主装置、２１はＣＰＵ、２２はス
イツチ回路、ＮＩＣは負性インピーダンス回路。

Claims (1)

    【実用新案登録請求の範囲】
  1. 主装置と複数の電話機とを有し、前記主装置は
    内蔵の制御部によりスイツチ回路を制御して１つ
    の局線に対して複数の前記電話機を接続して会議
    通路を可能とする機能を有する電話交換装置にお
    いて、前記主装置は、会議通話用の接続動作を行
    うと同時に会議通話に使われている局線に対し前
    記スイツチ回路を介してインピーダンス調整用の
    負性インピーダンス回路を接続する手段を有する
    ことを特徴とする電話交換装置。
JP4046289U 1989-04-07 1989-04-07 Pending JPH02133045U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4046289U JPH02133045U (ja) 1989-04-07 1989-04-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4046289U JPH02133045U (ja) 1989-04-07 1989-04-07

Publications (1)

Publication Number Publication Date
JPH02133045U true JPH02133045U (ja) 1990-11-05

Family

ID=31550273

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4046289U Pending JPH02133045U (ja) 1989-04-07 1989-04-07

Country Status (1)

Country Link
JP (1) JPH02133045U (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52108708A (en) * 1976-03-10 1977-09-12 Nec Corp Impedance automatic control system at the time of multiplex call

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52108708A (en) * 1976-03-10 1977-09-12 Nec Corp Impedance automatic control system at the time of multiplex call

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