JPS6244555U - - Google Patents

Info

Publication number
JPS6244555U
JPS6244555U JP13508185U JP13508185U JPS6244555U JP S6244555 U JPS6244555 U JP S6244555U JP 13508185 U JP13508185 U JP 13508185U JP 13508185 U JP13508185 U JP 13508185U JP S6244555 U JPS6244555 U JP S6244555U
Authority
JP
Japan
Prior art keywords
data communication
line voltage
telephone line
terminal device
connection
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
JP13508185U
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 JP13508185U priority Critical patent/JPS6244555U/ja
Publication of JPS6244555U publication Critical patent/JPS6244555U/ja
Pending legal-status Critical Current

Links

Description

【図面の簡単な説明】
第１図は本発明の実施例を示す回路図、第２図
は従来例の回路図である。 １２……制御装置、１３……フツクオフ検出回
路、１４……電話機、１５，１８，１９……リレ
ー接点、１６……極性反転回路、１７……着信検
出回路、２２……回線電圧検出回路。

Claims (1)

  1. 【実用新案登録請求の範囲】 電話回線を利用してデータ通信を行なうデータ
    通信端末装置において、 発信時に前記電話回線の回線電圧を検出する回
    線電圧検出回路を具え、この回線電圧検出回路に
    より検出される回線電圧にもとづいて電話回線と
    の接続の有無を判定し、無の場合は発信動作を行
    なわないことを特徴とするデータ通信端末装置。
JP13508185U 1985-09-05 1985-09-05 Pending JPS6244555U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13508185U JPS6244555U (ja) 1985-09-05 1985-09-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13508185U JPS6244555U (ja) 1985-09-05 1985-09-05

Publications (1)

Publication Number Publication Date
JPS6244555U true JPS6244555U (ja) 1987-03-18

Family

ID=31036929

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13508185U Pending JPS6244555U (ja) 1985-09-05 1985-09-05

Country Status (1)

Country Link
JP (1) JPS6244555U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0213340U (ja) * 1988-07-06 1990-01-26

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5995755A (ja) * 1982-11-24 1984-06-01 Nec Corp 回線切断検出機能付発呼回路

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5995755A (ja) * 1982-11-24 1984-06-01 Nec Corp 回線切断検出機能付発呼回路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0213340U (ja) * 1988-07-06 1990-01-26

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