118 lines
3.7 KiB
Plaintext
118 lines
3.7 KiB
Plaintext
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Inpho on Automatic Line Testers
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Typed By RiPMaX/LIBERTY
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DOC NO: [2/4]
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AUTOMATICE LINE TESTERS - S.A.L.T.
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GENERAL
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-------
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The S.A.L.T. (Subscriber Automatic Line Tester) is installed in exchanges to
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provide automatic testing facilities for telephones and line conditions on
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exchange services.
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After clearing the fault it is neccessary to test the complete telephone
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service including the insulation resistance on the line to earth and between
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the pair, the bell and dial operation.
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Access to the S.A.L.T. testing equipment is obtained by dialing the special
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number allotted to the particualr exchange. It is only neccessary to obtain
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access to the S.A.L.T. tester once. All subsequent tests may be made by
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dialing the code digit for that test. The following tests may be preformed in
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any order or independantly of each other without the need to release the
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tester.
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TO OBTAIN ACCESS TO S.A.L.T. TESTER
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-----------------------------------
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Dial the access code number for the particular exchange.
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* If the tester is free ring tone will be heard.
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* If no tone is heard wait for busy tone, hang up and try again.
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* If the tester becomes free while waiting, ring tone will be heard.
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Hang up and wait for telephone bell to ring ( About 4 seconds ).
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Lift receiver on ring back. If dial tone is heard the circuit is ready for
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testing to proceed.
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The S.A.L.T. is released when the handset is replaced after a test.
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INSULATION RESISTANCE TESTS A> A TO B B> A AND B TO EARTH
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-----------------------------------------------------------
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This is a combination test which tests both the insulation resistance between
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the pair and the insulation resisitance to earth.
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Dial 5 and listen for ring tone.
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Hang up and wait for telephone bell to ring.
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Lift receiver on ring back.
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Listen to tone :
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* 900 Hz = Line OK (I * R Over 1M<31>)
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* Busy Tone = Line Faulty (I * R between 0.5M<EFBFBD> and 1M<31>)
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* NU Tone = Line Faulty (I * R below 0.5M<EFBFBD>)
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If the service fails this test, use code digits 6 and/or 7 to isolate the
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problem.
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INSULATION RESISTANCE, A TO EARTH AND B TO EARTH
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------------------------------------------------
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Dial 6 and LIsten for ring tone.
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Continue as for Insulation resistance tests. (Code digit 5)
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INSULATION RESISTANCE, A TO B
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-----------------------------
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Dial 7 and LIsten for ring tone.
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Continue as for Insulation resistance tests. (Code digit 5)
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LINE LOOP RESISTANCE TEST
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-------------------------
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Dial 8.
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Listen to tone :
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* 900 Hz = Line OK
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* Busy Tone = Loop resistance too high
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* NU Tone = Loop resistance 200<30> or less.
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DIAL TEST
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---------
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Dial 1 and listen for ring tone, then dial "0".
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Listen to tone :
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* 0.5 seconds 900 Hz tone then ring tone = Dial OK.
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* NU Tone = Pulse Faulty (Replace)
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BELL TEST (FULL VOLTAGE)
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------------------------
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Dial 4 and Listen for ring tone.
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Hang up and ring back in 4 to 5 seconds.
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Lift receiver to trip ring.
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BELL TEST (HALF VOLTAGE)
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------------------------
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Dial 4 and Listen for ring tone.
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Continue as for full voltage test.
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TEST CONTROL FOR S.A.L.T.
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Dial 9 and listen for dial tone, which indicates that the testing equipment is
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functioning correctly. This test may be done at anytime time after access to
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the S.A.L.T. has been obtained. Hang up to release the testing equipment.
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*******************************************************************************
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THIS PHILE WAS DOWNLOADED FROM
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/\/\ L I B E R T Y W O R L D H E A D - Q U A R T E R S /\/\
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+ 61 9 447 6588
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LIBERTY - A FUTURE NOT OF DREAMS BUT REALITY!
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***********************************EOF*****************************************
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