TELEPHONE LINE ANALYZER KIT
MODEL TWT-1K
Assembly and Instruction Manual
Elenco Electronics, Inc.
Copyright © 2001 Elenco Electronics, Inc. 753082
PARTS LIST
RESISTORS
Qty. Symbol Value Color Code Part #
1 R9 120W 5% 1/2W brown-red-brown-gold 131201
1 R4 560W 5% 1/2W green-blue-brown-gold 135601
7 R1-R3, R5-R8 680W 5% 1/2W blue-gray-brown-gold 136801
SEMICONDUCTOR
Qty. Symbol Description Part #
4 D1-D4 Bi-Color (Red/Green) LED (Light Emitting Diode) 350007
MISCELLANEOUS
Qty. Description Part #
1 PC Board 519032
1 Solder 551135
1 Battery Snap 590098
1 Top Case 623124IC
1 Bottom Case 623219IC
Qty. Description Part #
2 Screw 643111
1 Label 723017
1 4 Wire Cable with RJ-11 Plug 920023
1 8 Wire Cable with RJ-45 Plug 920024
PARTS IDENTIFICATION
Resistor
Color bands show
resistor values
Semiconductor
LED
PC Board Top Case
4 Wire Cable with RJ-11 Plug
8 Wire Cable with RJ-45 Plug
Miscellaneous
Bottom Case
Battery Snap
IDENTIFYING RESISTOR VALUES
Use the following information as a guide in properly identifying the value of resistors.
Multiplier
Color Multiplier
Black 1
Brown 10
Red 100
Orange 1,000
Yellow 10,000
Green 100,000
Blue 1,000,000
Silver 0.01
Gold 0.1
Bands
1 2
Multiplier
Tolerance
BAND 1
1st Digit
Color Digit
Black 0
Brown 1
Red 2
Orange 3
Yellow 4
Green 5
Blue 6
Violet 7
Gray 8
White 9
BAND 2
2nd Digit
Color Digit
Black 0
Brown 1
Red 2
Orange 3
Yellow 4
Green 5
Blue 6
Violet 7
Gray 8
White 9
-1-
Screw
Label
Resistance
Tolerance
Color Tolerance
Silver +/-10%
Gold +/-5%
Brown +/-1%
Red +/-2%
Orange +/-3%
Green +/-.5%
Blue +/-.25%
Violet +/-.1%
SPECIFICATIONS
CATEGORY OF WALL PLATE JACKS
• Standard RJ-11 modular jacks with active telephone lines (one or two lines).
• Standard RJ-45 modular jacks with active telephone lines (one to four lines) for configuration EIA/TIA 568A
or B, AT&T 258A, token ring, or 10 BASE-T.
MULTIPLY FUNCTIONS
• Polarity identify (straight or reverse) cable and/or pairs.
• Open or short wiring test.
INTRODUCTION
The TWT-1 Telephone Line Analyzer has been designed to test telephone wall plates using RJ-11 and RJ-45
jacks. The most common jack used in homes, offices, or commercial establishments is the RJ-11. It is designed
to connect up to three telephone lines. However, it is most common to have one or two lines connected to the
jack. Your TWT-1 Tester will test up to two lines on an RJ-11 jack or up to four lines on an RJ-45 jack.
Line from outside
To other phones
Modular
Plug
Figure 1
Surface Mounting Modular Jack
Jack
Figure 2
Wall Plate Using RJ-11 or
RJ-45 Jacks (Modular Outlet)
Figure 3
Another Type of Wall Plate Using RJ-11 Jack
(Modular Outlet)
When testing a wall plate using an RJ-11 in a home, keep in mind that the single line may have multiple phones
connected. Figure 4 shows a home or office with three phones connected to a single incoming line. Note they
are in parallel. The 42A block, shown in Figure 4, is where your telephone lines start in your home or office.
The 42A block may have terminals marked “R”’ and ”‘T”. “R” stands for Ring and “T” stands for Tip. If correct
wiring procedures were followed, then red goes to “R” ring and green goes to “T” tip. Color code terminations
should be followed at all wall plates.
Figure 4
Multiple Phones Connected to a Single Line
R
Single Line
To Protector
42A
Red
T
Green
-2-
Wall
WallDesk
HOW IT WORKS
The TWT-1 Analyzer is easy to use in quick testing
of the telephone lines. It will indicate by the color of
the LED if the wiring is correct, reversed or if it is not
working at all.
WIRING CONFIGURATION
for RJ-11 JACKS
Figure 6
Typical color
RJ-11-2 RJ-11-4
1 6
scheme for one or
two lines.
1 6
Figure 5
It has four bi-colored LEDs that will light green or
red. LEDs 1 and 2 will respond to testing of an
RJ-11 jack having one or two lines. LEDs 1, 2, 3
and 4 will respond to testing of an RJ-45 jack
having one, two, three, or four lines using a wiring
scheme (see Figure 9).
Green LED is Lit - Indicates that the line
tested is operational and the wiring is correct.
Yellow
Green
Green
Yellow
Red
Red
Green
Green
Black
Red
Red
Black
RJ-11 Jack RJ-11 Jack
One Phone Line Two Phone Lines
Figure 7
Shows detail of how
the tip and ring are
connected on a four
connector cable.
+ = Tip
_
= Ring
Plug Polarities
O
P
E
N
2
3
PR2
PR1
4
5
Figure 8
Shows how the
phone wires relate
to the LEDs on the
analyzer for RJ-11.
O
P
E
N
61
Red LED is Lit - Indicates that the wiring to
the jack is reversed. On some phones, it
would make the phone inoperative and would
require a reversal of the wires terminating at
the phone jack. On many new phones, the
phone circuitry recognizes this reversal and
corrects for it.
No LED Lit - Indicates that the circuit is not
operational (open or shorted).
PR 1
Wires 3 and 4
Wires 2 and 5
When we refer to an RJ-11 plug and jack, we are
generally referring to a single or dual line plug and
jack. In the industry they may sometimes refer to an
RJ-11-2 as a single line jack and an RJ-11-4 as a
two line jack. Most modular jacks today are prewired with four wires and are suitable for one or two
lines. From the face of the wall plate, it is difficult to
tell if it’s wired for one or two lines.
-3-
PR 2
WIRING CONFIGURATIONS
FOR RJ-45 JACKS
The RJ-45 indicates an 8-wire plug or jack. There
are many standards which dictate which wire pairs
connect to which pins on a plug or jack. Some of
these standards are listed below.
Figure 10
Typical color
scheme for eight
lines.
1 8
EIA/TIA-568A
EIA/TIA-568A
EIA/TIA 568B
or AT&T 258A
Token Ring 10 Base T
Figure 9
Different Wiring Standards for RJ-45 8-Wire Jacks
Red
Black
Blue
Orange
Orange
Blue
Black
Red
Green
Yellow
Gray
Brown
Brown
Gray
Yellow
Green
RJ-45 Jack
Figure 11
Shows detail of how the tip and ring are connected on
a eight connector cable for EIA/TIA-568A standards
on Figure 9.
PR3 PR4
PR2
PR1
The telephone line analyzer TWT-1 is designed to
test the standard configurations shown in Figure 9.
The Electronic Industries Association established
this sequence as a “commercial building
specification”.
Shown below are the wire color codes for an
EIA/TIA-568A, shown in Figure 9.
White / Green
T
3
R3Green / White
T2White / Orange
R1Blue / White
T1White / Blue
R
Orange / White
2
T4White / Brown
R4Brown / White
2
1
Plug
Polarities
+ = Tip
_
3
= Ring
4
5
6
7
8
Figure 12
Shows how the phone wires relate to the LEDs on
the analyzer for EIA/TIA-568A.
PR 1
Wires 4 and 5
PR 2
Wires 3 and 6
PR 4
Wires 7 and 8
PR 3
Wires 1 and 2
-4-
CONSTRUCTION
Introduction
Assembly of your TWT-1K Telephone Line Analyzer Kit will prove to be an exciting project and give you much satisfaction and personal
achievement. If you have experience in soldering and wiring techniques, then you should have no problem with the assembly of this kit. Care
must be given to identifying the proper components and in good soldering habits. Above all, take your time and follow these easy step-bystep instructions. Remember, “An ounce of prevention is worth a pound of cure”. Avoid making mistakes and no problems will occur.
CAUTION: WEAR SAFETY GLASSES WHEN ASSEMBLING THIS KIT.
Assemble Components
In all of the following assembly steps, the components must be installed on the top side of the PC board unless otherwise indicated. The
top legend shows where each component goes. The leads pass through the corresponding holes and the board is turned to solder the
component leads on the foil side. Solder immediately unless the pad is adjacent to another hole which will interfere with the placement
of the other component. Cut excessive leads with a diagonal cutter. Then, place a check mark in the box provided next to each step to
indicate that the step is completed. Be sure to save the extra leads for use as jumper wires if needed.
Foil Side
Rx - 100W 5% 1/4W Resistor
(brown-black-brown-gold)
Mount Part
Bend Leads to Hold Part Solder and Cut Off Leads
Soldering
The most important factor in assembling your TWT-1K is good soldering techniques. Using the proper soldering iron is of prime
importance. A small pencil type soldering iron of 25 - 40 watts is recommended. The tip of the iron must be kept clean at all times
and well tinned. Many areas on the PC board are close together and care must be given not to form solder shorts. Size and care of
the tip will eliminate problems.
For a good soldering job, the areas being soldered must be heated sufficiently so that the solder flows freely. Apply the solder
simultaneously to the component lead and the component pad on the PC board so that good solder flow will occur. Be sure that the
lead extends through the solder smoothly indicating a good solder joint. Use only rosin core solder of 60/40 alloy.
DO NOT USE ACID CORE SOLDER! Do not blob the solder over the lead because this can result in a cold solder joint.
1. Solder all components from
the copper foil side only.
Push the soldering iron tip
against both the lead and the
circuit board foil.
2. First apply a small amount of
solder to the iron tip. This
allows the heat to leave the
iron and onto the foil.
Immediately apply solder to
the opposite side of the
connection, away from the
iron. Allow the heated
component and the circuit
foil to melt the solder.
Soldering Iron
Component Lead
Foil
Circuit Board
Soldering Iron
Solder
Foil
4. Here is what a good solder
connection looks like. Cut
off excess leads.
Example 1
Poor solder connections occur
when the lead is not heated
sufficiently. The solder will not
flow onto the lead as shown.To
correct. reheat the connection
and, if necessary, apply a small
amount of additional solder to
obtain a good connection.
Example 2
Solder does not flow onto the
lead. A hard rosin bead
surrounds and insulates the
connection.
Poor solder
connection
Soldering iron
positioned incorrectly.
3. Allow the solder to flow
Solder
around the connection.
Then, remove the solder and
Foil
the iron and let the
connection cool. The solder
should have flowed smoothly
and not lump around the wire
lead.
Soldering Iron
A solder bridge occurs when
solder runs between circuit
paths and creates a short
circuit. This is usually caused
by using too much solder. To
correct this, simply drag your
soldering iron across the
solder bridge as shown.
-5-
PC BOARD ASSEMBLY
Solder the following parts to the PC board.
Figure A
Mount the resistor flat against
the PC board as shown. Solder
and cut off the excess leads.
Solder Side
R6 - 680W 5% ½W Resistor
(blue-gray-brown-gold)
(see Figure A)
R3 - 680W 5% ½W Resistor
(blue-gray-brown-gold)
(see Figure A)
R7 - 680W 5% ½W Resistor
(blue-gray-brown-gold)
(see Figure A)
R2 - 680W 5% ½W Resistor
(blue-gray-brown-gold)
(see Figure A)
R8 - 680W 5% ½W Resistor
(blue-gray-brown-gold)
(see Figure A)
R4 - 560W 5% ½W Resistor
(green-blue-brown-gold)
(see Figure A)
R9 - 120W 5% ½W Resistor
(brown-red-brown-gold)
(see Figure A)
R1 - 680W 5% ½W Resistor
(blue-gray-brown-gold)
(see Figure A)
R5 - 680W 5% ½W Resistor
(blue-gray-brown-gold)
(see Figure A)
8 Wire Cable with RJ-45 Plug
(see Figure B)
4 Wire Cable with RJ-11 Plug
(see Figure C)
1 - Blue
2 - Orange
3 - Black
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Gray
PC Board
1. Insert the cable with
RJ-45 plug into the
hole in the PC board
as shown, noting the
direction of the plug.
1
8
Plug
2. Insert the eight colored
wires into the corresponding
holes in the PC board as
shown.
Figure B
3. Tug the cable down to the
position shown.
4. Turn the PC board
over. Solder the wires
and cut off the excess
leads.
-6-
PC BOARD ASSEMBLY
Solder the following parts to the PC board.
1 - Black
2 - Red
3 - Green
4 - Yellow
1. Insert the cable with
1
4
PC Board
Plug
RJ-11 plug into the
hole in the PC board
as shown, noting the
direction of the plug.
Figure C
2. Insert the four colored wires
into the corresponding holes
in the PC board as shown.
3. Tug the cable down to the
position shown.
4. Turn the PC board
over. Solder the wires
and cut off the excess
leads.
D4 - Bi-Color LED
(see Figure D)
D1 - Bi-Color LED
(see Figure D)
D2 - Bi-Color LED
(see Figure D)
D3 - Bi-Color LED
(see Figure D)
Figure D
Mount the LED flat onto the PC
board with the flat side of the
LED in the same direction as
marked on the PC board.
Solder and cut off the excess
leads.
Flat
-7-
TESTING AND TROUBLESHOOTING
1. One of the most frequently occurring problems is poor solder connections.
a) Tug slightly on all parts to make sure that they are indeed soldered.
b) All solder connections should be shiny. Resolder any that are not.
c) Solder should flow into a smooth puddle rather than a round ball. Resolder any connection that has
formed into a ball.
d) Have any solder bridges formed? A solder bridge may occur if you accidentally touch an adjacent foil
by using too much solder or by dragging the soldering iron across adjacent foils. Break the bridge with
your soldering iron.
2. Use a fresh 9V battery.
3. For all steps of testing (Tables 1 and 2), if the LED doesn’t light or more than one LED lights up, check for
bridges and open pads on the PC board, wires of the testing pair cable, and the testing LED.
If the color of the LED does not match with the color shown in the instructions, check orientation of the LED.
4. For testing, use a fresh 9V battery and battery snap.
RJ-45
Battery Snap
1
8
Red
1
4
RJ-11
Black
9V Battery
Figure 13
The following is the procedure for testing the PC board assembly and telephone line analyzer.
5. Test the RJ-11 connector.
Touch the red wire of the battery snap to pin 3 and the black wire to pin 2. The LED D3 of the PC board (#1
label) should light green.
Touch the red wire of the battery snap to pin 2 and the black wire to pin 3. The LED D3 (#1) should light red.
Check the other LED in the same manner and refer to Table 1 below.
6. Test the RJ-45 connector.
Check the RJ-45 connector in the same manner as the RJ-11 and refer to Table 2 below.
Table 1 RJ-11
Step Description
Red to pin 3
1
Black to pin 2
Red to pin 2
2
Black to pin 3
Red to pin 1
3
Black to pin 4
Red to pin 4
4
Black to pin 1
PCB Label Color
D3 #1 Green
D3 #1 Red
D2 #2 Green
D2 #2 Red
LED
Table 2 RJ-45
Step Description
1 Red to pin 5, Black to pin 4 D3 #1 Green
2 Red to pin 4, Black to pin 5 D3 #1 Red
3 Red to pin 3, Black to pin 6 D2 #2 Green
4 Red to pin 6, Black to pin 3 D2 #2 Red
5 Red to pin 1, Black to pin 2 D1 #3 Green
6 Red to pin 2, Black to pin 1 D1 #3 Red
7 Red to pin 7, Black to pin 8 D4 #4 Green
8 Red to pin 8, Black to pin 7 D4 #4 Red
PCB Label Color
-8-
LED
FINAL ASSEMBLY
Assemble the case as shown.
Screws
Figure E
Top Case
Label
Assembled PC Board
Bottom Case
Peel the backing off of
the label and stick the
label onto the top case.
Figure F
-9-
USING THE TELEPHONE LINE ANALYZER ON RJ-11 JACKS
Now that we have completed and tested the telephone line analyzer, you are ready to test wall plates that
have RJ-11 jacks with one or two lines. If wall plates with RJ-11 are not available, then you should use the
telephone line simulator Model TT-250. It will provide all of the conditions that would be found in the field and
are illustrated below.
The following is the procedure for testing a typical
one line RJ-11 jack:
1. Remove the phone wire from the
modular jack and insert the
smaller telephone plug of the
telephone line analyzer into the
telephone jack to be tested.
If the telephone line analyzer shows
2.
Green
LED 1 green, the telephone line
jack is working and it is wired with
straight polarity (see Figure 14).
The problem is in the telephone
cable going to the telephone or in
the telephone itself. The wiring in
the wall jack is correct.
DO NOT CALL THE
TELEPHONE COMPANY.
Figure 14
3. If the telephone line analyzer
shows LED 1 red (see Figure 15),
the modular jack is working with
reversed polarity. The wires are
reversed. A dial tone should still
exist, but this may be a problem
Red
for some touch phones. Plug the
phone back into the wall jack and
lift the receiver. If a dial tone is
present, but you do not get tones
when dialing, the wiring at the wall
jack should be corrected. See
technical data for wall jack wiring.
The following is the procedure for testing a typical
two line RJ-11 jack:
1. Remove the phone wire from the
modular jack and insert the
smaller telephone plug of the
telephone line analyzer into the
telephone jack to be tested.
2. LEDs 1 and 2 green (see Figure
17) indicates that both lines are
1 and 2
Green
working and are wired straight
polarity. The problem is in the
cable going to the phone or in the
telephone.
Figure 17
3. LEDs 1 and 2 red (see Figure 18)
indicates both lines are working
with reversed polarity. The wires
are reversed on both lines and
may be a problem. Plug the
phone into the wall jack and lift
the receiver. If a dial tone is
present, but you do not get tones
1 and 2
Red
when dialing, the wiring at the wall
jack should be corrected. See
technical data for wall jack wiring.
Figure 15
4. If the telephone line analyzer
shows LED 1 with no light (see
Figure 16), it indicates that the
line is open or wires are shorted.
Check the wall jack to make sure
a wire is not bent too far down,
No Light
broken, or touching another wire.
If the problem is not in the jack,
then you may need to call the
telephone company.
Figure 16
-10-
1 Green
2 Red
Figure 18
4. LED 1 green and LED 2 red (see
Figure 19) indicates that line 1 is
wired with straight polarity and
line 2 is reversed polarity.
5. LED 1 no light, LED 2 green or
red. Line one is not operational.
6. LED 1 green or red, LED 2 no
light. Line two is not operational.
Figure 19
USING THE TELEPHONE LINE ANALYZER ON RJ-45 JACKS
When testing an RJ-45 jack and there are two lines coming into the jack, two LEDs will be lit. If you have four
lines coming into the jack, four LEDs will be lit. If wall plates with RJ-45 jacks are not available, then you should
use the telephone line simulator Model TT-250. It will provide all of the conditions that would be found in the
field and are illustrated below.
Before testing, you should know which wiring standard is coming into the jack.
TIA-568B or
EIA/TIA-568A
AT&T 258A
Token Ring 10 Base T
Pair 1
Pair 2
Pair 3
Pair 4
Pair 1
Pair 3
Pair 2
Pair 4
Pair 1
Pair 2
Pair 2
Pair 1
Figure 20
The number pairs match with the number of LEDs on the label of the analyzer for EIA/TIA-568A and Token Ring
Y (see Figure 20).
ONL
The following is the procedure for testing RJ-45 jacks (for EIA/TIA-568A):
1. Remove the phone wire from the modular jack and insert the bigger telephone plug of the telephone line
analyzer into the telephone jack to be tested.
If the telephone line analyzer shows all green lights, the modular jack is working with straight polarity of all pairs.
2.
3. If the telephone line analyzer shows all red lights, the modular jack is working with reverse polarity of all pairs.
4. If you have mixed colors of lights, or some lights are not lit, you may have a problem.
No light indicates an open pair, a pair not being used, or shorted wires.
5. For example, if LED 2 is not lit, but LEDs 1, 3 and 4 are green, line 2 (pair 2 for EIA/TIA-568A) is defective.
Pair 2 is wire 3 (T
white / orange) and wire 6 (R2orange / white).
2
-11-
LEARNING TO USE THE TWT-1 TELEPHONE LINE SIMULATOR MODEL TT-250
Elenco Electronics has developed a telephone line simulator, Model TT-250, for the TWT-1 Telephone Line
Analyzer. It will simulate the most common field situations. It provides an RJ-11 jack for one or two line testing,
straight and reversed wiring and simulates opens.
It also provides an RJ-45 jack for one, two, three, or four line testing, straight and reversed wiring and simulates opens.
Contact Elenco Electronics (800) 533-2441 for availability and price of the telephone line simulator Model TT-250.
A great teaching tool for the telecommunication field.
If the
simulator
on page 8, or a wall plate that has a phone connected to it. Remove the telephone line plug from the wall plate.
Establish that it is an RJ-11 or RJ-45 type jack, and insert the correct plug into the wall plate. If you know that it
is a single line phone, number 1 on the line analyzer should be lit green. If it is lit red, the wires are reversed. The
phone could still work because the phone has a circuit built into it to reverse it to the proper polarity.
If you know where there are wall plates with more than one line coming in, then test that wall plate so that you
get familiar with normal readings.
DO NOT LEAVE THE TELEPHONE LINE ANALYZER IN THE JACK FOR ANY LENGTH OF TIME, AS THAT
LINE WILL GIVE A BUSY SIGNAL AND COULD OVERHEAT THE UNIT.
Model TT-250 is not available for testing and troubleshooting the TWT-1, you can use the method
HOW THE CIRCUIT WORKS
The telephone line analyzer has four identical
indicators of polarity input voltage. Every indicator
includes two resistors and bi-color light emitting
diodes (LED), see Figure 21.
A
C
Ra
Figure 21
The operation of the bi-color LED is very simple. This
LED has two standard LEDs inside with red and
green colors. When voltage on the anode (A) of the
first single color LED is higher than the voltage on the
cathode (C), current flows through this LED and it will
emit light. At the same time, other single LEDs will
not light. After changing the polarity of the voltage,
the second LED will emit light.
C Green
A Red
Rb
SCHEMATIC DIAGRAM
The resistor Rb limits the current so that the LED will
not be damaged. The normal open telephone line
voltage between the tip and ring wires is 48VDC.
The resistors Ra and Rb divide an input voltage to a
lower voltage that the telephone line has when
connecting the telephone to the loop.
-12-
QUIZ
1. Solder is comprised of what two materials?
A. Gold and copper
B. Tin and lead
C. Zinc and copper
D. Lead and aluminum
6. Solder wick is used to . . .
A. remove solder.
B. solder in small parts.
C. cleaning the soldering iron tip.
D. removing flux.
2. What type of flux should be used in electronics?
A. Chloride
B. Organic
C. Rosin
D. Corrosive
3. When working on PC boards, what wattage range
of iron is ideal?
A. 25-40 watts
B. 50-100 watts
C. 1-10 watts
D. 100-200 watts
4. Tinning the soldering tip will prevent it from . . .
A. heating.
B. melting.
C. soldering.
D. oxidizing.
5. Proper solder adhesion requires that the metal
surface to be . . .
A. solder free.
B. clean.
C. greasy.
D. cold.
7. A cold solder joint is caused by . . .
A. a solder bridge.
B. using 60/40 solder.
C. insufficient heat.
D. acid core solder.
8. When two adjacent foils accidentally touch, it is
called . . .
A. a jumper.
B. a blob.
C. a solder hole.
D. a solder bridge.
9. What ratio has the greatest amount of tin?
A. 20/60
B. 40/60
C. 50/50
D. 60/40
10. A good solder connection should be . . .
A. dull and rough.
B. shiny, bright and smooth.
C. lumped around the connection.
D. soldered on one side of the connection.
Answers: 1. B, 2. C, 3. A, 4. D, 5. B, 6. A, 7. C, 8. D, 9. D, 10. B
-13-
TELECOMMUNICATION EQUIPMENT & KITS
Telephone Line Simulator
Model TT-250
Test and demonstrate the usage of the TWT-1 Telephone
Line Analyzer. Simulate typical telephone line problems.
Vinyl Case Included
NEW
Telephone Line Analyzer
Model TT-400
A telephone line analyzer that provides fast indication of
telephone line polarity, ring and line voltage levels, condition
of phone line from user’s telephone to central telephone
office - also can check basic telephone functions and
condition of telephone line cord.
Available Assembled Model TT-400K
Multi-Network Cable Tester
Model TCT-255
This tester is a convenient instrument for testing
different unshielded wiring schemed telephone cables
with RJ-11 and RJ-45 connectors and coax cables.
Cables can be tested before and after they are installed.
Available as
Kit TCT-255K
Modular Crimping Tool
Model HT-568
Features:
• Testing cables before or after their installation.
• Mapping Function
• Cable Identification (straight or cross-pinning)
• Pair Identification (straight or cross-pinning)
• Open or Short Testing
• Low Battery Indicator
• Auto Power-Off Function (30 s.)
Soft Vinyl Zippered Case (Model C-90) Included. (5 1/2” x 7” x 1 3/4”)
Modular Cable Plug Kit
Model MCP-5
Contains 30 modular plugs for RJ-11 and RJ-45.
10 - 6P4C 10 - 6P6C 10 - 8P8C
5 ft. 4 Wire Modular Flat Cable
5 ft. 6 Wire Modular Flat Cable
5 ft. 8 Wire Modular Flat Cable
Cuts, strips, and crimps modular plugs RJ-45 and RJ-11.
Cushion grip. 7 1/2” long.
-14-
WORD GLOSSARY
42A Block A terminal block that provides telephone line junctions.
Anode The positive terminal of a diode or other polarized component.
Bi-Color LED A component that combines two dice of different colors upon a single substrate or lead-frame
carrier.
Cathode The negative terminal of a diode or other electronic component.
Current Transport of electrons through a conductor and measured in amps.
Dial Tone A 350 and 440 hertz tone that is imposed on the line when the phone is first taken off the hook.
Diode An electronic component that rectifies AC to DC. Used for signal detection.
E.I.A. Standard T568A
E.I.A. Standard
T568B or AT&T 258A
FCC Federal Communications Commission. A U.S. Government agency that regulates and monitors
Ground An electrical connection to the earth of the a common conductor which is connected to the earth.
Hertz The basic unit for frequency or cycles per second.
LED (Light Emitting Diode) A semiconductor diode emitting incoherent light at its P-N junction when
Modular Cable A telephone cable with modular plugs used to connect phones or devices to the system.
Modular Jack The female connector of a telephone outlet.
Modular Plug The male connector that plugs into a modular jack.
PC Board Printed Circuit Board that has copper traces for conducting circuits to components.
Polarity Refers to positive (+) and negative (–) poles of a voltage source.
Positive The plus (+) pole of a battery DC supply or other polarity-sensitive item.
Pulse A short signal.
Ring The name of one conductor of a telephone line pair, identified by R. Most often the red wire and
RJ-11 A designation given to modular plugs and jacks capable of handling 1 to 3 phone lines.
RJ-45 A designation given to modular plugs and jacks, similar to an RJ-11, but larger and capable of
TelCo Abbreviation for telephone company.
Tip The name of one conductor of a telephone line pair, identified by T. Most often the green wire and
USOC A universal service code derived from Bell System specifications.
USOC 4 Refers to two pairs or lines on an RJ-11 jack.
Voltage Electrical potential difference measured in volts.
The Electronic Industries Association established this sequence as a “commercial building
specification”.
Designed for data transmission.
the domestic use of the electromagnetic spectrum for communications.
forward biased.
the most negative of the two wires.
handling 1 to 4 lines.
the most positive of the two wires.
Elenco Electronics, Inc.
150 W. Carpenter Avenue
Wheeling, IL 60090
(847) 541-3800
http://www.elenco.com
e-mail: elenco@elenco.com
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