Bedienungsanleitung Fluke networks TS23 PRO (Seite 14 von 22) (Englisch)

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TS23 PRO Test Set

Users Guide

Originating a Call

Press Q.

Connect the test leads to the Tip and Ring of a

subscriber loop.

Monitor (listen to) the line to verify that it is idle.

If the line is not idle, disconnect the test set from

the line.

If the line is idle, press P.

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.

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:

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.

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.

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