Cabling

Question 1

What are the 2 types of copper cabling (and their acronyms)?

Answer 1

STP - Shielded Twisted Pair

UTP - Unshielded Twisted Pair

Question 2

What is the MAC approach?

Answer 2

Moves, Additions and Changes

Simplicity in adds, moves or changes in installation configurations

Question 3

What are the acronyms NEXT?

Answer 3

Near End Cross Talk

Question 4

What are the acronyms FEXT?

Answer 4

Far end Cross Talk

Question 5

What is the acronym MCC?

Answer 5

Main Cross Connect

Question 6

What is the acronym MUTOA?

Answer 6

Multi-User Telecommunications Outlet Assembly

Question 7

What is structured cabling?

Answer 7

A telecommunications design concept that uses a common cable type to support all applications running across it

Question 8

When is MAC most effective?

Answer 8

When cabling a new premises

Question 9

What 2 types of wiring configurations are used in SCS?

Answer 9

Vertical

Horizontal

Question 10

What is meant by an evolved product?

Answer 10

Improved level of performance (Cat 5E or Cat 6)

Question 11

What is meant by a revolutionary change?

Answer 11

An abrupt break with past technology (Copper to Fibre / Copper to Wireless)

Question 12

When is vertical wiring used and what is the recommended cable to use?

Answer 12

To connect wiring closets between floors Single Mode Fibre recommended

Question 13

When is vertical wiring used?

Answer 13

To connect the wiring closet to the wall jacks in each user location

Question 14

What is the maximum length of a copper cable?

Answer 14

90m

Question 15

What 4 things are included in the distance of horizontal wiring?

Answer 15

1. The Cable
2. The drop inside the wall
3. The wall jack
4. the patch cable from the wall to the PC

Question 16

What does the acronym TIA stand for?

Answer 16

Telecommunications Industry Association

Question 17

What does the acronym EIA stand for?

Answer 17

Electronics Industries Alliance

Question 18

What is the commercial building telecommunication cabling standard?

Answer 18

TIA/EIA 568

Question 19

Standards are important for 4 reasons, what are they?

Answer 19

1. Properly installed cable will not cause connectivity failures
2. Any trained installer can expand or repair a properly installed system
3. Easy to retest
4. Meets fire and electrical standards

Question 20

What does the TIA/EIA 658 standard define?

Answer 20

How to design, build and manage a structured cabling system

Question 21

A SCS is designed in blocks with very specific performance characteristics. How are those blocks integrated?

Answer 21

In a hierarchical manner to create a unified communication system

Question 22

What physical components are defined by TIA/EIA 568?

Answer 22

Fibre Cable
UTP Cable
STP Cable

Question 23

What is the rated channel performance for Cat 5E, Cat 6 and Cat 7?

Answer 23

Cat 5E - 100 MHz
Cat 6 - 250 MHz
Cat 7 - 600 MHz

Question 24

What is the difference between stranded and solid cable?

Answer 24

Solid is made up of one 24-gauge strand of wire

Stranded is made up of 7 - 9 strands of copper that make up one 24-gauge conductor

Question 25

A higher gauge means what?

Answer 25

A thinner wire

Question 26

What are some advantages of solid conductor cable?

Answer 26

Less Expensive Less Attenuation Easier to punch down

Question 27

What type of cable is recommended if the cable will have a lot of movement?

Answer 27

Stranded Cables

Question 28

What is the impedance of shielded cable?

Answer 28

150 ohms

Question 29

Twisted-Pair cabling has additional shielding to reduce what?

Answer 29

Crosstalk and other forms of EME

Question 30

Which is more expensive between STP and UTP and why?

Answer 30

STP because it has much more protection

Question 31

What physically provides the protection in a STP cable?

Answer 31

Each twisted cable is wrapped in foil | There is an inner braided copper mech contained in the outer insulating jacket

Question 32

When is STP primarily used?

Answer 32

In networking environments with high levels of EMI

Question 33

Cable carries what 2 fire ratings?

Answer 33

CSA Rating | UL Rating

Question 34

What are the 5 cautions of UTP?

Answer 34

1. Mutual Capacitance 2. Characteristic Impedance 3. Attenuation 4. NEXT 5. Singaling Rating

Question 35

What is mutual capacitance?

Answer 35

Wires that are in close proximity causing a capacitive coupling effect between pairs

Question 36

What is attenuation?

Answer 36

The loss of signal over distance travelled

Question 37

What is near end crosstalk?

Answer 37

The measurement of a cable's ability to reject crosstalk between pairs of wire at the near end of the circuit

Question 38

Where is crosstalk the worst?

Answer 38

Points of termination

Question 39

What is a megabit?

Answer 39

``` The amount (or speed) in which data is transferred One million bits (125KB) ```

Question 40

What are megahertz?

Answer 40

The analog frequency of the carrier signal used to transmit the data

Question 41

What is signaling rate and how is it measured?

Answer 41

The rate of change of the state of a digital signal Measured in Hz

Question 42

What does signaling rate affect?

Answer 42

NEXT and Attenuation

Question 43

What are the 2 types of lines?

Answer 43

Balanced & Unbalanced

Question 44

What is a balanced line?

Answer 44

An electrical cable consisting of pairs of conductors that have identical electrical characteristics with respect to each other and with respect to ground Example: Twisted-pair cabling used in 10Base T Ethernet

Question 45

What is an unbalanced line?

Answer 45

An electrical cable in which the potential of the signal-carrying conductor is above ground while the return-path conductor is at ground potential Example: Coaxial Cable

Question 46

Why is four pair UTP recommended in new installations?

Answer 46

It supports voice and high-speed data transmission

Question 47

What is the MCC (Main Cross Connect) and where is it usually located?

Answer 47

1. Connection between the building backbones and 2. external connections 3. Located on the ground floor

Question 48

What are the two cabling methods with zone cabling?

Answer 48

1. Multi-User Telecommunications Outlet Assembly (MUTOA) | 2. Consolation Point

Question 49

What company created the concept of zone cabling?

Answer 49

AMP Corporation

Question 50

What is the zone cabling concept?

Answer 50

The open office area is divided into zones, with feeder cables running to a distribution point within each zone and short cable runs to each outlet. Zones are wired with reusable, pre-terminated cable assemblies

Question 51

How many work stations are supported with zone cabling?

Answer 51

12

Question 52

What are the colour codes for a 568A cable wiring?

Answer 52

``` Pin 1: white/green Pin 2: Green Pin 3: white/Orange Pin 4: Blue Pin 5: white/Blue Pin 6: Orange Pin 7: white/Brown Pin 8: Brown ```

Question 53

What are the colour codes for a 568B cable wiring?

Answer 53

``` Pin 1: white/Orange Pin 2: Orange Pin 3: white/Green Pin 4: Blue Pin 5: white/Blue Pin 6: Green Pin 7: white/Brown Pin 8: Brown ```