JPS58197948A - 親子電話機における状態検出回路 - Google Patents

親子電話機における状態検出回路

Info

Publication number
JPS58197948A
JPS58197948A JP57080155A JP8015582A JPS58197948A JP S58197948 A JPS58197948 A JP S58197948A JP 57080155 A JP57080155 A JP 57080155A JP 8015582 A JP8015582 A JP 8015582A JP S58197948 A JPS58197948 A JP S58197948A
Authority
JP
Japan
Prior art keywords
telephone
circuit
state detection
line
diode
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
JP57080155A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0237741B2 (enrdf_load_stackoverflow
Inventor
Toshifumi Tanaka
敏文 田中
Kiyoshi Masuda
清 増田
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP57080155A priority Critical patent/JPS58197948A/ja
Publication of JPS58197948A publication Critical patent/JPS58197948A/ja
Publication of JPH0237741B2 publication Critical patent/JPH0237741B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/71—Substation extension arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP57080155A 1982-05-14 1982-05-14 親子電話機における状態検出回路 Granted JPS58197948A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57080155A JPS58197948A (ja) 1982-05-14 1982-05-14 親子電話機における状態検出回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57080155A JPS58197948A (ja) 1982-05-14 1982-05-14 親子電話機における状態検出回路

Publications (2)

Publication Number Publication Date
JPS58197948A true JPS58197948A (ja) 1983-11-17
JPH0237741B2 JPH0237741B2 (enrdf_load_stackoverflow) 1990-08-27

Family

ID=13710405

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57080155A Granted JPS58197948A (ja) 1982-05-14 1982-05-14 親子電話機における状態検出回路

Country Status (1)

Country Link
JP (1) JPS58197948A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622753A (ja) * 1985-06-28 1987-01-08 Tokyo Electric Co Ltd 電話回線の信号検知回路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS622753A (ja) * 1985-06-28 1987-01-08 Tokyo Electric Co Ltd 電話回線の信号検知回路

Also Published As

Publication number Publication date
JPH0237741B2 (enrdf_load_stackoverflow) 1990-08-27

Similar Documents

Publication Publication Date Title
US4756021A (en) Telephone set
US4813067A (en) Apparatus for connecting selectively a telephone answering device or additional equipment, such as a facsimile machine, to telephone lines
US3420963A (en) Communication system line circuit particularly for key telephone systems
JPS58197948A (ja) 親子電話機における状態検出回路
JPS59133761A (ja) 加入者電話システム
JPH057909B2 (enrdf_load_stackoverflow)
JPH0432580B2 (enrdf_load_stackoverflow)
JP2804551B2 (ja) 家庭用簡易交換装置
JPS6259500B2 (enrdf_load_stackoverflow)
JPS6361822B2 (enrdf_load_stackoverflow)
JP3616576B2 (ja) 局側インタフェースの呼び出し信号検出システム及び方法
JP2524882B2 (ja) 通信管理装置
JPS58219863A (ja) 呼出信号検出装置
KR100191216B1 (ko) 두 개의 전화라인을 보유한 전화기
JPS6012857A (ja) 網制御装置の信号識別回路
JPH0741236Y2 (ja) 呼出し信号検出回路
JPH042519Y2 (enrdf_load_stackoverflow)
JPS646618Y2 (enrdf_load_stackoverflow)
JP2859907B2 (ja) 網制御装置
JPH0646755B2 (ja) 網制御装置
JPH0230635B2 (enrdf_load_stackoverflow)
JPS6328159A (ja) 電話機スイツチ装置
JPS6276354A (ja) フツクオフ検出回路
JPH08205216A (ja) 単独電話機を収容するボタン電話装置
JPS63279644A (ja) 電話機の着信信号・ハウラ信号検出回路