LINE TESTING
(1) Identify the pair at the customer end.
(2) Insert Probe leads and connect to the identified pair. Press
a Probe button to change the Oscillator to the selected mode.
(3)
Open Circuit.
Oscillator tone is disconnected and line is left
open circuit. After disconnecting Probe leads from line,
insulation resistance tests may be done on the open line.
(4)
Short Circuit.
Oscillator tone is disconnected and line is
looped. White wire is also shorted to line. After disconnecting
Probe leads from line, loop resistance may be measured.
(5)
Exchange Connect.
Oscillator tone is disconnected and
line is connected through to exchange. Green LED on Probe
indicates that 48Vdc is connected to line.
FAULT LOCATION
Two Wire Test
Used with a single pair containing one good wire and the faulty
wire.
(1) Disconnect the pair under test from the exchange.
(2) Connect the Blue Oscillator leads to the pair under test
(white lead not used).
(3) At the customer end identify the pair and press OPEN to
disconnect the oscillator from line.
(4) Disconnect Probe Leads and test the line to identify the
faulty wire.
(5) Press SHORT to loop line then carry out fault location.
Three Wire Test
(1) As for Two-Wire Test but connect the Blue leads to a good
pair and the White lead to the faulty wire. Note that in Short
Circuit Mode, all three wires are looped at the Oscillator.
Pulse Echo Test (PET)
The loop / unloop facility can be used to calibrate a PET for
length of line to Oscillator.
Teletech Pty Ltd
61 Betula Ave,
P O Box 85, Vermont, VIC 3133
Tel: 03 9873 2777
Fax: 03 9873 5902
