119 lines
3.6 KiB
Plaintext
119 lines
3.6 KiB
Plaintext
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Inpho on Automatic Line Testers From the Telescum Manuals..
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Typed Together by RiPMaX/LIBERTY!!
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DOC NO : [1/4]
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AUTOMATIC LINE TESTERS - A.P.R.
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GENERAL
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-------
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The A.P.R. is installed in exchanges to provide automatic testing facilities
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for telephones and line conditioners on exchange services. After clearing a
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fault it is necessary to test the complete telephone service including the
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insulation resistance of the line to earth and between the pair, the bell and
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dial operation. Access to the A.P.R. testing equipment is obtained by dialing
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the special number allotted to the particular exchange. It is only necessary
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to gain access to the A.P.R. tester once. All subsequent tests may be made by
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dialing the code digit for that test. Tests listed below 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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OBTAIN ACCESS TO A.P.R. TESTER
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------------------------------
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Dial access code number for the particular exchange.
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* If tester is free ring tone will be heard immediately.
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* If no tone is heard then WAIT for busy tone, hang up and try again.
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* If while waiting the tester becomes free, ring tone will be heard.
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Hang up and wait for the telephone bell to ring (about 4 seconds).
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Lift reciever on ring back. If A.P.R. tone (900hz) is heard, the circuit is
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ready to proceed with testing.
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The A.P.R. is released when the handset is replaced after a test.
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INSULATION TEST (A TO EARTH)
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----------------------------
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Obtain access to A.P.R. tester.
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Dial 5 , Listen for Busy 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 for tone :
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* Dial tone = Line OK (I * R over 1 M<> [ohm]).
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* NU tone = Line faulty (I * R 0.5M<EFBFBD> to 1M<31>).
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* Ring tone = Line faulty (I * R under 0.5M<EFBFBD>).
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INSULATION TEST (B TO EARTH)
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----------------------------
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Dial 6 and listen for busy tone.
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Continue as for Insulation test A to Earth.
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INSULATION RESISTANCE (A TO B)
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------------------------------
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Dial 7 and Listen for busy tone.
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Continue as for Insulation test A to Earth.
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LINE LOOP RESISTANCE
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--------------------
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Dial 8.
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Listen to tones :
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* NU tone = line OK.
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* Dial tone = Loop resistance too high.
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* Ring tone = Loop resistance 200<30> or less.
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DIAL TEST (SPEED)
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-----------------
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Dial 1 then 0.
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Listen to tone :
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* NU tone = Dial speed OK.
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* Dial tone = Dial fast (Replace).
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* Ring tone = Dial slow (Replace).
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DIAL TEST (RATIO)
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-----------------
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* NU tone = Dial Ratio OK.
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* Dial tone = Ratio high (Replace).
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* Ring tone = ratio low (Replace).
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BELL OPERATION (FULL VOLTAGE)
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-----------------------------
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Dial 3 and listen for busy tone.
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Hang up and ringing commences in 4 to 5 seconds.
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Lift receiver to trip ring.
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BELL OPERATION (HALF VOLTAGE)
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-----------------------------
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Dial 4 and listen for busy tone.
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Continue as for Full voltage test.
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TESTING CONTROL OF A.P.R.
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-------------------------
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Dial 0 and listen for A.P.R. tone (900Hz), which indicates that the testing
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equipment is functioning correctly. This test may be done at any time after
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access to A.P.R. tester.
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Hang up to release 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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