CN1119775C - 能监控电话线断路的报警设备 - Google Patents

能监控电话线断路的报警设备 Download PDF

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Publication number
CN1119775C
CN1119775C CN97104584A CN97104584A CN1119775C CN 1119775 C CN1119775 C CN 1119775C CN 97104584 A CN97104584 A CN 97104584A CN 97104584 A CN97104584 A CN 97104584A CN 1119775 C CN1119775 C CN 1119775C
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CN
China
Prior art keywords
circuit
line
current
telephone line
abnormality
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.)
Expired - Lifetime
Application number
CN97104584A
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English (en)
Chinese (zh)
Other versions
CN1177160A (zh
Inventor
古川显一
松本聪
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.)
SECONN CO Ltd
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SECONN 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
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Publication of CN1177160A publication Critical patent/CN1177160A/zh
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Publication of CN1119775C publication Critical patent/CN1119775C/zh
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
CN97104584A 1996-09-19 1997-04-02 能监控电话线断路的报警设备 Expired - Lifetime CN1119775C (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP248038/1996 1996-09-19
JP248038/96 1996-09-19
JP24803896A JP3544797B2 (ja) 1996-09-19 1996-09-19 異常通報装置

Publications (2)

Publication Number Publication Date
CN1177160A CN1177160A (zh) 1998-03-25
CN1119775C true CN1119775C (zh) 2003-08-27

Family

ID=17172279

Family Applications (1)

Application Number Title Priority Date Filing Date
CN97104584A Expired - Lifetime CN1119775C (zh) 1996-09-19 1997-04-02 能监控电话线断路的报警设备

Country Status (7)

Country Link
JP (1) JP3544797B2 (ja)
KR (1) KR100668991B1 (ja)
CN (1) CN1119775C (ja)
AU (1) AU722707B2 (ja)
MY (1) MY125066A (ja)
SG (1) SG54475A1 (ja)
TW (1) TW322565B (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4504241B2 (ja) * 2005-04-01 2010-07-14 株式会社ナカヨ通信機 相手応答自動検出方法および相手応答自動検出装置
JP6468064B2 (ja) * 2015-05-11 2019-02-13 株式会社リコー 通信制御装置、通信装置、画像形成装置、通信制御装置の制御プログラム
US10382312B2 (en) * 2016-03-02 2019-08-13 Fisher-Rosemount Systems, Inc. Detecting and locating process control communication line faults from a handheld maintenance tool
JP2020166474A (ja) * 2019-03-29 2020-10-08 能美防災株式会社 火災報知システム、分散型火災報知システム、火災受信機、及び電話中継器
CN110753163B (zh) * 2019-10-28 2021-05-18 上海市共进通信技术有限公司 用于光网络终端voip功能模块的保护装置及其方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5968096A (ja) * 1982-10-12 1984-04-17 東京綜合警備保障株式会社 加入回線の断線監視装置
US4737776A (en) * 1986-08-07 1988-04-12 Wallace Wireman Circuit for detecting cut telephone service line and transmitting signal over telephone trunk line
US4922529A (en) * 1988-12-06 1990-05-01 Kiel David J Automatic hangup apparatus for restoring service to off-hook telephones
US4998271A (en) * 1989-08-28 1991-03-05 Venture Technologies, Inc. Telephone accessory
JP2832196B2 (ja) * 1990-11-30 1998-12-02 群馬綜合ガードシステム 株式会社 電話回線断線検知装置
JPH06223290A (ja) * 1993-01-26 1994-08-12 Atsumi Denki Kk 断線検知システム及び電話装置

Also Published As

Publication number Publication date
SG54475A1 (en) 1998-11-16
AU722707B2 (en) 2000-08-10
KR100668991B1 (ko) 2007-05-14
JPH1097693A (ja) 1998-04-14
MY125066A (en) 2006-07-31
TW322565B (en) 1997-12-11
JP3544797B2 (ja) 2004-07-21
KR19980023992A (ko) 1998-07-06
AU1513997A (en) 1998-03-26
CN1177160A (zh) 1998-03-25

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Granted publication date: 20030827