Twisted Pair Cabling

Question 1

Cross Over Cable

Answer 1

For connecting similar devices to each other

Question 2

Horizontal Cabling

Answer 2

Permanent network cabling within a building Extends from telecommunications closet into LAN work area

Question 3

Terminated

Answer 3

Where cable connects to wall jack, patch panel, or RJ-45 connection

Question 4

Overall length limiation of UTP cable from TC to networking device?

Answer 4

100 meters

Question 5

STP

Answer 5

Shielded Twisted-Pair Cable Wire screen / metal foil shield placed around cable to reduce EMI

Question 6

FastEthernet

Answer 6

100 Mbps

Question 7

Recommended cable for LAN work areas

Answer 7

CAT6 UTP

Question 8

Straight-through Cable

Answer 8

Question 9

Attenuation

Answer 9

Insertion Loss

Amount of loss in signal strength as it propogates down the wire.

Question 10

Crosstalk

Answer 10

Voltage induced in adjacent wires.

Hearing another conversation when you are on the phone

Question 11

NEXT

Answer 11

Near-end Crosstalk

Measure of level of crosstalk within the cable

Question 12

PSNEXT

Answer 12

Power Sum NEXT

Measure of total crosstalk of all cable pairs

Question 13

ELFEXT

Answer 13

Equal Level FEXT

Attenuation value subtracted from FEXT (Far-end crosstalk) loss.

Question 14

PSELFEXT

Answer 14

Power Sum ELFEXT

Combined ELFEXT of all four wire pairs

Question 15

ACR

Answer 15

Signal level from transmitter at far end to crosstalk at near end

Question 16

PSACR

Answer 16

Power Sum ACR

Difference between PSNEXT and attenuation for all four wire pairs

Question 17

Return Loss

Answer 17

Ratio of power transmitted into cable and amount of power returned

Question 18

Propogation Delay

Answer 18

Measure of time it takes for a signal to propagate from one end of a cable to the other

Question 19

Delay Skew

Answer 19

Difference in arrival time between fastest and lowest signal in a UTP wire pair

Question 20

AXT

Answer 20

Alien Crosstalk

Unwanted signal coupling from one permanent link to another

Question 21

TCL

Answer 21

Transverse Conversion Loss

Also called LCL (Longitudinal Conversion Loss)

Measured by applying common-mode signal to input and measuring differential signal level at output.

Question 22

ELTCTL

Answer 22

Equal level Transverse Conversion Transfer Loss

Difference between Transfer Conversion Transfer Loss and differential mode insertion loss of the pair being measured.