JPH0167859U - - Google Patents

Info

Publication number
JPH0167859U
JPH0167859U JP1987163894U JP16389487U JPH0167859U JP H0167859 U JPH0167859 U JP H0167859U JP 1987163894 U JP1987163894 U JP 1987163894U JP 16389487 U JP16389487 U JP 16389487U JP H0167859 U JPH0167859 U JP H0167859U
Authority
JP
Japan
Prior art keywords
data communication
time
telephone
line
telephone line
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
JP1987163894U
Other languages
English (en)
Other versions
JPH0614538Y2 (ja
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 JP1987163894U priority Critical patent/JPH0614538Y2/ja
Publication of JPH0167859U publication Critical patent/JPH0167859U/ja
Application granted granted Critical
Publication of JPH0614538Y2 publication Critical patent/JPH0614538Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Facsimile Transmission Control (AREA)
  • Interface Circuits In Exchanges (AREA)

Description

【図面の簡単な説明】
第1図は本考案による回線切替制御装置の好適
な一実施例を示すブロツク図、第2図はデータ通
信終了後に行う本電話機側への回線切り替えの制
御動作を示すフローチヤート、第3図は同じく本
電話機側への回線切り替えの他の実施例を示す制
御動作のフローチヤート、第4図は局とデータ通
信端末装置間で閉結されていた直流ループの開放
による電話回線の電圧変化を示すタイムチヤート
である。 1……データ通信端末装置、2……NCU部、
4……送受話部、5……制御部、6……操作部、
7……本電話機、8……着信検出部、9……極性
反転検出回路。

Claims (1)

    【実用新案登録請求の範囲】
  1. 電話回線を介してデータ通信を行うデータ通信
    端末装置と本電話機とを前記電話回線に対して択
    一的に接続し、局との間で直流ループを形成させ
    る回線切替制御装置において、前記データ通信端
    末装置によるデータ通信終了後に起動され一定時
    間経過後にタイムアツプ出力するタイマーを備え
    、データ通信終了と同時に前記直流ループを開放
    するとともに、前記タイムアツプ出力に基づき前
    記電話回線を前記本電話機側に切り替えるよう構
    成したことを特徴とする回線切替制御装置。
JP1987163894U 1987-10-27 1987-10-27 回線切替制御装置 Expired - Lifetime JPH0614538Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987163894U JPH0614538Y2 (ja) 1987-10-27 1987-10-27 回線切替制御装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987163894U JPH0614538Y2 (ja) 1987-10-27 1987-10-27 回線切替制御装置

Publications (2)

Publication Number Publication Date
JPH0167859U true JPH0167859U (ja) 1989-05-01
JPH0614538Y2 JPH0614538Y2 (ja) 1994-04-13

Family

ID=31449030

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987163894U Expired - Lifetime JPH0614538Y2 (ja) 1987-10-27 1987-10-27 回線切替制御装置

Country Status (1)

Country Link
JP (1) JPH0614538Y2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03175775A (ja) * 1989-12-04 1991-07-30 Fujitsu Denso Ltd 電話機付き端末装置の擬似リンガ音鳴動防止方式

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61278261A (ja) * 1985-06-04 1986-12-09 Matsushita Electric Ind Co Ltd 非常通報装置
JPS6417548A (en) * 1987-07-13 1989-01-20 Secom Co Ltd Automatic communication equipment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61278261A (ja) * 1985-06-04 1986-12-09 Matsushita Electric Ind Co Ltd 非常通報装置
JPS6417548A (en) * 1987-07-13 1989-01-20 Secom Co Ltd Automatic communication equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03175775A (ja) * 1989-12-04 1991-07-30 Fujitsu Denso Ltd 電話機付き端末装置の擬似リンガ音鳴動防止方式

Also Published As

Publication number Publication date
JPH0614538Y2 (ja) 1994-04-13

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