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Fluke networks TS23 PRO Manual

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10
TS23 PRO Test Set
Users Guide
Originating a Call
1
Press Q.
2
Connect the test leads to the Tip and Ring of a
subscriber loop.
3
Monitor (listen to) the line to verify that it is idle.
4
If the line is not idle, disconnect the test set from
the line.
5
If the line is idle, press P.
6
If there is no data on the line and talk battery is
present, the test set goes off-hook and draws dial
tone.
Note
If there is more than 140 V dc on the line, the
TALK LED is red and test set will not go off-
hook.
7
Dial the desired number.
Note
If you mis-dial the number, press
Q, press
P, then enter the number again.
Disconnecting a Call
To disconnect a call, press
Q or remove the test
leads from the line.
Answering a Call
When the tester receives a ringing signal, press
P to
make the tester go off-hook.
Note
The test set will not go off-hook if the line
voltage exceeds 140 V dc.
Ground Start
Ground start lines are typically found on PBX
installations. To activate an idle, ground-start
telephone line, do the following:
1
Press Q, and connect the test leads to Tip and
Ring of the ground start line. With a third wire,
temporarily short the Tip side of the line to earth
ground. A wire with an alligator clip at each end is
often used for this. Do not allow clips to short
network connections.
2
With the short to earth ground in place, press
P. When dial tone is received, remove the third
wire from earth. The circuit is now ready for
dialing.
Data Safe Practices
With the increase in high capacity data lines in the
distribution system comes the greater risk of disrupting
data services when working on analog lines. Always
monitor the line for an audible signal before
attempting to go off-hook to draw dial tone. To detect
data signals within the human audio range, such as
produced by voiceband modems and subrate DDS
transceivers, you must listen to the line using the test
set’s audio monitoring capability. If you hear the hiss of
a voice band modem or low frequency data transceiver,
do not press
P. If you press P, the test set will go
off-hook and will interfere with the voice band modem
or data transceiver. To avoid this, try another line or
wait until the line is idle.
When going from pair to pair searching for tracer tone
or dial tone, it is best to connect the test set to Tip and
Ring of the pairs. Avoid the practice, either in Talk or
Monitor mode, of clipping one lead of the test set to
ground, and using the other lead to search for tracer
tone or dial tone on a block. This may create an
electrical imbalance on a data line that will disrupt
service. Once you find the voice line you are searching
for then it is OK to test Tip to ground or Ring to ground
on that line.
Be careful not to short the test leads together when
connecting to a data line (or any line for that matter),
as this could bring down the service.
Put the test set in Monitor mode when you use other
instruments to troubleshoot a line.
… 14 …


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