KR940023213U - Short circuit detection circuit of telephone line - Google Patents

Short circuit detection circuit of telephone line

Info

Publication number
KR940023213U
KR940023213U KR2019930005199U KR930005199U KR940023213U KR 940023213 U KR940023213 U KR 940023213U KR 2019930005199 U KR2019930005199 U KR 2019930005199U KR 930005199 U KR930005199 U KR 930005199U KR 940023213 U KR940023213 U KR 940023213U
Authority
KR
South Korea
Prior art keywords
telephone line
detection circuit
short circuit
circuit
short
Prior art date
Application number
KR2019930005199U
Other languages
Korean (ko)
Other versions
KR950006927Y1 (en
Inventor
김정대
Original Assignee
김정대
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 김정대 filed Critical 김정대
Priority to KR2019930005199U priority Critical patent/KR950006927Y1/en
Publication of KR940023213U publication Critical patent/KR940023213U/en
Application granted granted Critical
Publication of KR950006927Y1 publication Critical patent/KR950006927Y1/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
    • 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
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)
KR2019930005199U 1993-03-30 1993-03-30 Line checking circuit for telephone KR950006927Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019930005199U KR950006927Y1 (en) 1993-03-30 1993-03-30 Line checking circuit for telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019930005199U KR950006927Y1 (en) 1993-03-30 1993-03-30 Line checking circuit for telephone

Publications (2)

Publication Number Publication Date
KR940023213U true KR940023213U (en) 1994-10-22
KR950006927Y1 KR950006927Y1 (en) 1995-08-23

Family

ID=19353144

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019930005199U KR950006927Y1 (en) 1993-03-30 1993-03-30 Line checking circuit for telephone

Country Status (1)

Country Link
KR (1) KR950006927Y1 (en)

Also Published As

Publication number Publication date
KR950006927Y1 (en) 1995-08-23

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Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
NORF Unpaid initial registration fee