13
Operation
It is best to put the test set in Monitor mode when
troubleshooting a line, searching for capacitance kicks,
RF signals, craft provided tones, etc.
Data Lockout Override Operation
Normally, when the test set detects data, it means the
operator has accidentally connected to a high-speed
data line and should immediately disconnect from the
line to avoid disrupting the data service. But in some
cases the operator must go off-hook on a specific line
even though the test set indicates that the line is a data
line.
The following are scenarios where the operator may
wish to override a data lockout:
When there is false data detection due to RF
pickup on a line that is near an AM radio
broadcast antenna. The RF induced in the line may
appear to be data.
When performing a ground start, the test set may
lock out when the Talk/Monitor switch is in the
T
position. This is because ground start lines are
unbalanced before startup and thus are prone to
picking up a lot of noise which may appear to be
data to the test set. If this occurs, use the override
function to go off-hook on a ground start line.
Telephone lines near AM radio broadcast facilities pick
up the RF signals from the broadcast antennas.
Normally this is not a problem for the test set. If the line
is well balanced, the test set will not see the RF signal
because it is a common mode (longitudinal) signal. But
if the line is unbalanced, part of the RF signal will be
converted to a differential (metallic) signal. If the signal
amplitude is high enough, it may be detected as high-
speed data by the test set. If you know for sure you are
on such a line, use the override function to go off-
hook.
The data lockout override can be activated only when
the Talk/Monitor switch is in the
T
position. To activate
the override, press the
OVERRIDE
key. If dc voltage is
present, the test set goes off-hook. To go back on-
hook, unclip the test set’s test leads from the line or put
the test set into Monitor mode.
High Voltage Lockout Operation
W
Warning
X
If the voltage on the line is above 140 V dc,
this is potentially dangerous to you and the
test set. If you encounter this, carefully
remove the test set’s clip leads from the line.
Be sure to hold the clip leads by their
insulated boots and avoid touching the clip
lead’s metal parts with your hands. Do not
short the test leads to each other while it is
connected to a line carrying high voltage.
The TS52PRO is designed for use by Outside Plant and
Central Office technicians in environments where
analog voice lines co-exist with lines that carry high dc
voltage.
Accidentally going off-hook on a line carrying a high dc
voltage can damage the power supply feeding the line.
To prevent this, the TS52PRO provides an automatic
high-voltage lockout function. When a TS52PRO is
connected to a Tip and Ring pair with its Talk/Monitor
switch in the
T
position, it measures the voltage on the
line before going off-hook. If the measured voltage
exceeds 140 V dc, the test set locks out, preventing
itself from going off-hook. The display shows
LOCKOUT HI VDC
.
In the event of a high voltage lockout, the Talk/
Monitor switch should be set back to the
M
position,
and the test set leads should be carefully removed from
the line.
Configuring Your Test Set
When you are programming speed dial numbers or
setting operating parameters, the test set expects you
to press keys in a specific sequence. If, during a
programming procedure, you accidentally press a key
that’s out of sequence, the test set will abort the
programming procedure and all you have to do is start
the programming procedure over again. When you
complete a programming procedure correctly, the test
set will give you a confirmation tone. If you do not get
a confirmation tone when you expect one, assume you
made a programming error and just start the
programming procedure over again.
