Test Equipment Depot - 800.517.8431
99 Washington Street - Melrose, MA 02176
User’s Manual
1 Edition 2016
©2016 Copy Right by Prokit’s Industries Co., Ltd.
INTRODUCTION ……………..……………....2
SAFETY and WARNING………..………..…..2
PRODUCT FEATURES …………………..…..5
FRONT PANEL……………………………...…6
CABLE REPAIRE…..…………………………12
The 4 in 1 CABLE SNIFFER-REMOTE provides
4 common LAN and computer cables test. It tests
installed cables or patch cords with RJ-45, RJ-11,
USB, and BNC connectors. It is intended to test
cables with straight through connections not
cables with reversed or transposed connections
like some LAN crossover cables or reverse wired
telephone cables.
Read instructions carefully before using this
tester. Failure operation may result in
damage to the tester or injury to the users.
Do not use this tester with its case open, or
with parts removed. Doing so may damage
the tester and/or injure the user.
When using this tester in schools and
workshops, responsible teachers or skilled
personnel must control the usage of this
tester. Failure to observe this precaution may
result in damage to the tester or injury to the
Follow the recommendations of any Trade
Organizations or Regulatory Agencies whose
scope encompasses the use of this tester
failure to do so may result in damage to the
tester or injury to the user.
5. Do not open this tester for maintenance
without first disconnecting it from all external
circuitry. Failure to observe this precaution
may result in damage to the tester or injury
to the user.
6. Repairs and maintenance must only be
carried out by qualified service personnel or
qualified electricians/technicians who know
the dangers of, and the safety rules
applicable to this type of equipment. Failure
to observe this precaution may result in
damage to the tester or injury to the user.
7. Do not touch the ends of the cables when
making tests. An Unexpected dangerous
potential may be present. Failure to observe
this precaution may result in damage to the
tester or injury to the user.
8. Do not apply voltage or current to any of the
tester’s connectors. Doing so many damages
the tester and /or injury the user.
9. This tester is not for use by children. Failure
to observe this precaution may result in
damage to the tester or injury to the user.
10. Do not use this tester to make
measurements in adverse environments
such as rain, snow, fog, or locations with
steam, explosive gases or dusts.
Do not use tester in condensing
atmospheres. That is, do not use tester in
conditions where ambient temperature and
humidity could cause condensation of water
inside of the tester.
Do not use this tester if it is wet, either from
exposure to the weather, or after cleaning
the case of the tester.
Do not attempt immediate use of the tester
when bringing it from a cold environment to a
warm environment. Condensation of water,
inside and outside of the tester, may produce
dangerous conditions. Allow the tester to
warm to room temperature before using.
Do not modify this tester. Changing the
design may make the tester unsafe and may
result in injury to the user.
Do not use this tester if it has undergone
long-term storage user unfavorable
Do not use the tester if it has been damaged
in transport.
Avoid usage near strong magnetic fields
(magnets, loudspeakers, transforms, motors,
coils, relays, contactors, electromagnets, etc.)
The tester may display readings that are in
Avoid usage near strong electrostatic fields
(high voltage power lines, televisions,
computer monitors, etc.). The tester may
display readings that are in error.
19. Avoid usage near strong RF fields (radio or
television transmitters, walkie talkie, cellular
phones etc.).The tester may display reading
that is in error.
20. Remove the battery when the tester may be
left unused for longer than month. Chemical
leakage from the battery could damage the
Test 4 types of cables
Simple one button test
Ergonomic portable handheld design
Tests installed wiring or patch cables
Remote unit stores in main unit
500meter(1,640ft) test distance
Convenient battery access
Built in battery test
LEDs indicate connections and faults
Beeper provides audible annunciation of test
Tests shielded (STP)or unshielded(UTP)
LAN cables
Test USB cables
PoE line voltage protective design
1. Cables Tested: UTP and STP LAN cables
Terminated in RJ-45 male connectors. (EIA/ TIA
568)RJ-11 cables with male connectors, 2 to 6
connectors installed. USB cables with Type A
flat plug on one end and type B square Plug on
other end. BNC cables with male connectors.
2. Faults Indicated: No Connection, Short,
connected, crossover.
3. Low Battery Indicator: LED light up to indicate
low battery
4. Case Dimensions:6.3x3.4x1.0 inches(LxWxH)
5. Weight:170 grams,0.375Ibs (without battery)
6. Battery: 1 pc 9-volt alkaline battery.(Not
Test Equipment Depot - 800.517.8431
99 Washington Street - Melrose, MA 02176
RJ45 to BNC female connector
Instruction manual
Pouch bag
1. General information: the cable sniffer-remote
performs its tests when the single button on its
front panel is pressed and released.6 Status
LEDs indicate the condition of the cable being
tested, as well as informing the user that
power is turned on, and that the battery is
good (or bad).8 additional connection LEDs
light to indicate that specific wires in a cable
are connected.
Only one cable can be tested at a time. i.e. A
BNC cable and an RJ-45 cable cannot be
tested simultaneously.
2. The MAIN and REMOTE unit: The CABLE
SNIFFER-REMOTE consists of a Main unit
and a Remote unit .The Remote unit stores
conveniently on the bottom of the Main unit. It
can be removed or replaced by sliding it from
left to right or right to left respectively. Use
care when removing or replacing the Remote.
Some of the plastic edges are a little sharp.
The Remote is often attached to the Main unit
when storing, when transporting, or when
patch cables are being tested. The Remote is
removed from the Main unit when an installed
(in wall, ceiling, etc.) cable is being tested.
3. Testing Patch cables:
“Patch” cables have both ends accessible at
the same location. Usually, but not always,
these cables are less than 25ft in length, and
are not installed in a wall or ceiling. Since both
ends are accessible, one end can be plugged
into the Main unit, and another end into the
Remote unit. It is not necessary to remove the
Remote unit from its docked position on the
Main unit.
4. Testing Installed cables:
To test cables installed in ceilings or walls, or
in applications that prevent the ends from
being in the same location, the Remote can be
detached from the Main unit. Once detached,
the Remote can be attached to one end a
cable, and the Main unit attached to the other
to the other end of the cable. These ends are
often in different rooms and on different floors
of a building.
5. Performing the Test:
Once the Remote and Main unit are attached
to the ends of the subject cable, as described
in 6.3 and 6.4 ,testing may begin, simply press
and release the test button on the Main unit,
observe the LED indicators, and note the
beeping sound that comes from the Main unit.
6. Interpreting the Results:
6.1 Battery Good Indicator:
The “BATTERY GOOD” LED should light
whenever the test button is pressed and
released. It will stay in for a minimum of 10
seconds, or for however long the test button
is pressed. If the “BATTERY GOOD” LED
does not light, replace the battery.
6.2 Low Battery Indicator:
When the “BATTERY LOW” LED light on,
replace the battery.
6.3 No connection LED/Single Beep
If the Remote is not connected to the main
unit with a cable, or the cable has no intake
conductors, the “NO CONNECTION” LED
with light and the beeper will sound once.
6.4 Connected LED/Lo-Hi Beep /Numbered
If the “CONNECTED” LED lights and the beeper
emit a Lo-Hi beep, examine the numbered LEDs
(i.e. LEDs numbered to 8 and the S LED).
Corresponding to the type of cable being tested
must light .Examine the table below the Numbered
LEDs, noting what LEDs should light .If all of the
LEDs do not light; the cable has an OPEN fault. If
all of the appropriate numbered LEDs light, the
cable is OK.
When testing an RJ-45 UTP cable, the S LED must
not light. The CABLE SNIFFER-REMOTE is
intended to test complete cables. It may not find
faults in cables that are intentionally incomplete.
For example, the standard EIA/TIA 568 RJ-45
terminated Ethernet cables is expected to contain 8
conductors. If only 4 conductors are used between
the RJ-45 connectors. The CABLE
SNIFFER-REMOTE may not properly identify the
RJ-11 cables may have 2 connections, 4
connections, or as many as 6 connections. For 2
connection cables, LED 3 and 4 must light .For 4
connection cables, LED 2,3,4, and 5 must light. For
6 connection cables, LED 1, 2,3,4,5, and 6 must
light. The numbered LEDs do not indicate that a
good connection exists, only that a connection
exists. If the “SHORT” or “CROSSOVER” LEDs are
light, there is a fault in the cable.
6.5 Short LED/3 Beepers/Numbered LEDs
If the “SHORT” LED light, the beeper emits 3 beeps,
the Numbered LEDs indicate the location of a
In the “SHORT” mode, the Numbered LEDs only
indicate the location of the shorts. The other
Numbered LEDs are dark. If more than 3 numbered
LEDs light, there may be multiple shorts in the
6.6 Crossover LED/2 Beepers/ Numbered
If the “CROSSOVER “ LED lights, the beeper emit
2 beeps, the Numbered LEDs lights will flashing
and indicate the location of a cross.
In the “CROSSOVER” mode, RJ-11 cables used
for telephone connections are often crossed. Even
new cables are often crossed. This seldom affects
the performance of standard analog telephone
lines (POTS). Digital telephone lines and old
touch-tone phones may be polarity sensitive, so a
crossed cable may prevent then from working
General information: The following section
provides information to the user about common
cable types, common failures and repairs. It is
not meant to be an exhaustive study of the topic,
just some basic information that the uninitiated
may find helpful.
Cable damage: When a cable tests badly,
either the wire of the connectors or both may be
at fault. If the cable has been installed and
working, then it’s likely that the wire or
connectors have been abused in some way. The
wire portion of the cable can be damaged by
being crushed (under the leg of a desk),
stretched (pulled sharply around a corner),
punctured (by a nail or staple), over loaded (hit
by lighting), etc. Similar abuses will damage the
connectors on the ends of the cable. The
connectors can also be damaged by excessive
insertion and removal or flexing of the cable
close to connector body. While the CABLE
SNIFFER-REMOTE can identify a bad cable, it
cannot determine if the wire or the connectors
are at fault. The user must examine the different
parts of the cable to determine the cause of
failure and take the appropriate steps to correct
the problem.
3. Which end is bad?
The CABLE SNIFFER-REMOTE like many cable
testers, cannot find the location of the fault, or
even determine which end or connector is bad. It
simply knows that a fault exists. The user must
locate the fault and take the appropriate action.
4. Cables with molded on ends:
Many cables have molded on ends that cannot
be opened up for repair. The entire cable must be
replaced, or the molded on end removed and
replaced with a user serviceable
connector .These types of cables usually fail from
Opens or Shorts. They seldom fail from a
Crossed connection.
5. Cables with crimped on RJ connectors:
Crimped on RJ connectors cannot be reused or
repaired. New connectors must be installed on
the cable. If the cable being tested has just been
made up or put in service, and it tests as Open or
Crossed, the RJ connectors have probably been
installed incorrectly. Shorts very seldom occur as
the result of a badly crimped RJ connector, so
the user should suspect a problem with the wire
(possibly a staple or mail through the wire, or a
crushed or pinched wire) if the 4 in 1 indicates a
short. A visual examination of the RJ connectors
may reveal the fault---but keep in mind that
what-ever the cause of a connector problem (i.e.
mis-wiring improper stripping of the wire, bad
crimp, etc.) The only solution is to replace the
connector. Consequently, it is not necessary for
the user to know the exact cause of the problem,
simply to make sure that he installs the new
connector correctly!
Conflicting Results:
Sometimes, the test results of the 4 in 1 seem to
conflict with the performance of the cable---i.e.,
the cable tests badly but works OK, or vice versa.
The following items list some of the reasons why.
6.1. The Cable Sniffer-Remote indicates the
cable is not working, but my LAN
works OK:
Installed LAN cables with RJ-45 connectors
that have been in service and working OK
may test as Open, Shorted, or Crossed.
Here’s why---The EIA/TIA 568 standard for
LAN cable only uses 4 of the wires in the
eight-wire cable. The other 4 wires in the
cable may have faults, but these will not affect
the operation of the LAN. The 4 in 1 tests all
of the wires in the LAN cable, and identifies
the faults, even though these wires may not
being used in the LAN system. Not all LAN
cables are wired straight through Crossover
cables used on LANs are purposely mis-wired,
with their Receive and Transmit wires cross
test this as a bad cable, but it may work just
fine as Crossover cable.
my cable is good, but it does not
work on my LAN:
Many cable testers like the CABLE
SNIFFER-REMOTE only perform continuity
style tests (open, short, crossover, etc).
Ethernet LAN cables are constructed in a
special way. The 8 wires inside are grouped
into 4 pairs of 2 way. Not only must the 8
wires connect from end to end of the cable,
the pairs in the cable must connect to specific
pins of RJ-45 plugs on to the ends of cable
ignoring the pairing (as described in EIA/TIA
568),and the cable will test ok. But when the
cable is tried on the LAN, it does not
work .This is because the lack of the proper
pairing causes excessive cross talk in the
cable, preventing the LAN from working. This
type of cable fault is sometimes call a split
pair or double split pair to detect this type of
fault, a more sophisticated tester capable of
performing a NEXT test(Near End Cross Talk)
must be used. Both the Pair Master and LAN
TDR can perform NEXT tests.
Cross talk increases with the length of the
cable. A LAN system will tolerate a certain
amount of cross talk. A short cable (10ft or
less) that is improperly paired may work just
fine. However, longer cables paired in exactly
the same way, may not work. This explains
why an installer can make short jumper
cables that work (although they are
improperly paired), but when he installs
RJ-45’s in exactly the same way on a longer
cable, the cable does not work.
my phone cable is bad, but my phone
works ok.
Most single line telephones only use 2 wires
in a modular cable the modular cable, which
terminates in RJ-11 connectors could have as
may as 6 wires in it. The unused wires may
have faults, which the 4 in 1 identifies, but
these faults may have no effect on the
working 2-wrie telephone circuit. Many
telephone cables with RJ-11 plugs/jacks are
wired inverse. The CABLE
SNIFFER-REMOTE will show that a cable like
this is crossed. A cable like this reverses the
polarity of the telephone line. Most regular
telephones made in the last 10 years are not
polarity sensitive. So, even though the cable
is wired in reverse (crossed), it may work OK.
Early touch-tone telephones and answering
machines were polarity sensitive. If connected
in reverse polarity, the touch-tone phone may
not dial out (no touch), and the answering
machine may not answer when the line rings.
Your CABLE SNIFFER-REMOTE is a precision test
instrument and, when used as described in this manual,
should not require maintenance. There are no internal
adjustments. Calibration is not required. To clean the
outside of the tester, use a cloth dampened with a mild
detergent solution. Do not use any abrasive cleansers
or chemical solvents that may damage the case of the
The group of products may be discontinued, models
specifications, price or design changed at any time
without notice and without incurring any obligation.
Test Equipment Depot - 800.517.8431
99 Washington Street - Melrose, MA 02176
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