VDV Works Virtual Hands-On Training
Cat 3 and Cat 5/5E/6 UTP Termination
Test your comprehension!
1. Why are punchdown blocks
used with Cat 3 and Cat 5/5E/6 cabling?
Terminate cables from equipment
Interconnect cables in a telecom closet
Change from T568A to T568B terminations
Meet EIA/TIA 568 Standards
2. Which punchdown block is
more often used with data (Cat 5/5E/6)?
3. Which punchdown block is
more often used with telephones (Cat 3)?
4. What is BLOG?
The color code for punchdowns
The color code for T568B jacks
The author of EIA/TIA 568
None of the above
5. What actually makes the
electrical connection with the wires in a 110 block?
Punchdown tool with 110 blade
Insulation displacement connectors in the connecting
The base of the block
A second cable
6. When stripping Cat 5/5E/6
cable, what must you remember to prevent damaging cable performance?
Remove enough much jacket to work with the wires
Make sure to not nick the wires
Strip the wires individually
Retwist any pairs that come untwisted
7. The most important thing
to remember when working with Cat 5/5E/6 cable is to_______.
Note the distance markings on the cable
Mark the cable for documenting its location later
Pull the cable gently from the box
Do not untwist the pairs more than 1/2 inch (12
8. Why does each pair in Cat
5/5E/6 cable have different twist rates?
Help identify each pair
Decrease signal attenuation
9. The punchdown tool does
two jobs. What are they?
Pushes the wire into the IDC contact
Untwists excess wire
Makes the installation neater
Cuts off the excess wire
10. What kinds of connection
does a jack typically have?
11. Does a jack have the same
color code for the pairs as a punchdown block?
Depends on the type of jack
Depends on whether it is T568A, T568B or USOC
12. Why do Cat 5/5E/6 and Cat
3 jacks have different wiring color codes? (hint: 2 answers are
Cat 3 jacks are used for other types of terminations,
Cat 5 jacks have internal twists to prevent crosstalk
Manufacturers use different termination processes
for Cat 3 and Cat 5 jacks
Cat 3 and Cat 5 cables have different color codes
for the pairs
13. True or False? Jacks can
be used in either patch panels and work area outlets.
14. 66 punchdown blocks have
4 contacts across a row. Why?
Allow connecting up to 4 cables on a single block
Two contacts on each side are connected to allow
cables on one side to be terminated to cables on the other side
with bridging clips or wires
Leaves more room for placing wires
Fits all kinds of cable
15. Wires are punched down
on a 66 block in color code order:
Depends on whether its T568A, T568B or USOC
Just like a 110 block, BLOG
Doesn't matter what order
Same as a Cat 3 jack
16. The Cat 3 jack is the same
as a Cat 5/5E/6 jack except :
There are no internal twists to change the color
The color codes use different colors
It only connects to RJ-45 plugs
It snaps into outlets upside down
17. What is a RJ-45 connector?
The connector used only with Cat 5 jacks
A special high frequency connector
A modular 8 pin connector with USOC termination
A trade name
18. Patchcords have a major
difference from the installed Cat 3 or Cat 5/5E/6 link. What is
The connectors have molded strain relief
Patchcord cables are colored for identification
The connectors are clear plastic so you can see
the color coding
They are made of stranded wire for flexibility
19. What is the most important
thing to remember to get the most performance out of Cat 5/5E/6
Maintain the proper color coding throughout
Maintaining the twists in the pairs as close as
possible to the termination
Make all punchdowns secure
Keep the cables close together near the punchdown
20. If you mix Cat 3 and Cat
5/5E/6 hardware in a cabling system:
You will only get Cat 3 performance
Pairs will be reversed because of color code differences
Depends on the manufacturer of the hardware
You can't mix them since the hardware is incompatible