Hand telephone line inspection instrument

Hand telephone line inspection instrument

The utility model provides a hand telephone line inspection instrument, which comprises a power circuit, a switch, a control circuit, a line break discrimination circuit, a resistor discrimination circuit, an indicating circuit, and a telephone, wherein, the power circuit is connected with the telep...

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1. Verfasser: QUANYONG LI
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
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description The utility model provides a hand telephone line inspection instrument, which comprises a power circuit, a switch, a control circuit, a line break discrimination circuit, a resistor discrimination circuit, an indicating circuit, and a telephone, wherein, the power circuit is connected with the telephone or the line break discrimination circuit, and the resistor discrimination circuit by the control of the switch to provide power signals; the line break discrimination circuit and the resistor discrimination circuit are respectively connected with a test end through the control circuit, and output signals of the line break discrimination circuit and the resistor discrimination circuit are connected with the indicating circuit. On the basis of the normal communication, the utility model does not need power. The utility model can be used for discriminating the property of obstacles of the measured telephone line. The utility model has the advantages of simple operation, direct viewing, and low cost.
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On the basis of the normal communication, the utility model does not need power. The utility model can be used for discriminating the property of obstacles of the measured telephone line. The utility model has the advantages of simple operation, direct viewing, and low cost.</description><edition>6</edition><language>eng</language><subject>ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; TELEPHONIC COMMUNICATION</subject><creationdate>1999</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19990512&amp;DB=EPODOC&amp;CC=CN&amp;NR=2318767Y$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19990512&amp;DB=EPODOC&amp;CC=CN&amp;NR=2318767Y$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>QUANYONG LI</creatorcontrib><title>Hand telephone line inspection instrument</title><description>The utility model provides a hand telephone line inspection instrument, which comprises a power circuit, a switch, a control circuit, a line break discrimination circuit, a resistor discrimination circuit, an indicating circuit, and a telephone, wherein, the power circuit is connected with the telephone or the line break discrimination circuit, and the resistor discrimination circuit by the control of the switch to provide power signals; the line break discrimination circuit and the resistor discrimination circuit are respectively connected with a test end through the control circuit, and output signals of the line break discrimination circuit and the resistor discrimination circuit are connected with the indicating circuit. 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On the basis of the normal communication, the utility model does not need power. The utility model can be used for discriminating the property of obstacles of the measured telephone line. The utility model has the advantages of simple operation, direct viewing, and low cost.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record>
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
title Hand telephone line inspection instrument
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