3
. Press the
PTT
switch while lightly tapping the phone housing with a pen or
pencil. If you hear the tapping in the TT-46 speaker, it is an indication that
the phone is “hot on hook”. Release the
PTT
switch.
4
. Rotate the Pair switch through all six positions while repeating step 3.
5
. Place the test switch in the “
Test 2”
position and repeat steps 3 and 4.
LOCATING WIRETAPS AND
WHAT TO DO IF YOU FIND ONE
All of the wiretaps can be located by close physical inspection of the inside
wiring. Remember, if someone installed it, you’ll be able to find it.
Note that series taps can be made very small. A favorite way to disguise
one is to wrap it with tape so it looks like a wire splice or connection.
There are two basic ways phone systems are wired. In the loop method,
each phone is connected at different points to the same wire run. In the
branch method, a separate wire pair is run to each phone location from the
TNI.
When performing the Parallel test, all the wiring is tested at one time,
regardless of the wiring method used.
In the Series test, if the test was made at point D in the Loop Wiring method,
the entire loop would be checked with one test. But, if you only checked at
point C, the wiring from C to D would not be tested. So, it is important for you
to know the wiring plan before you start testing.
If you find one tap, don’t stop looking – there may be others. A common
technique of people planting taps is to place one that can easily be found in
the hopes that you won’t look for any more after finding the first one. If you
find one tap, it would be a good idea to retest the inside wiring to be sure no
others are present.
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