B3P3 Fixed-line communication

Question 1

active node

Answer 1

splits/merges traffic into separate/single streams using computationalPower;

Question 2

aggregation

Answer 2

merging traffic from ANs onto the CN;

Question 3

asymmetric digital subscriber line (ADSL)

Answer 3

where downstream dataRate is much higher than upstream dataRate;

Question 4

bin (DMT)

Answer 4

= a subchannel;

Question 5

bit loading (DMT)

Answer 5

where bitsPerSymbol are allocated to subchannels;

Question 6

bit swapping (DMT)

Answer 6

loading a subchannel that has spare capacity with bits;

Question 7

Data over Cable Service Interface Specification (DOCSIS)

Answer 7

internationalStandards governing hybrid fibre-coaxial (HFC) ANs;

Question 8

disaggregation

Answer 8

splitting traffic from the CN to the ANs;

Question 9

discrete multitone transmission (DMT)

Answer 9

a subclass of OFDM with modScheme flexibility;

Question 10

distribution point

Answer 10

a connectionPoint close to endUser in the localLoop;

Question 11

dynamic bandwidth allocation (DBA)

Answer 11

where the passiveAN instucts OpticalLineTerminal to release specific bufferData at specific times;

Question 12

echo cancellation

Answer 12

where a localLoop can simultaneously carry upstream and downstream data;

Question 13

far-end crosstalk (FEXT)

Answer 13

interference between circuits at receiverEnd;

Question 14

fast path (ADSL)

Answer 14

where no interleaving is used;

Question 15

hybrid fibre-coaxial (HFC)

Answer 15

the coaxialCableSystem used for television-telephony-broadband from AN to endUser;

Question 16

interleaved path (ADSL)

Answer 16

where interleaving is used;

Question 17

microfilter

Answer 17

prevent interference between voice and data channels;

Question 18

near-end crosstalk (NEXT)

Answer 18

where receiver affected by the crosstalk is at same end as the interferring transmitter;

Question 19

optical line terminal (OLT) (upstream)

Answer 19

the terminating unit at the upstream end of an AN using optical fibre;

Question 20

optical network terminal (ONT) (downstream)

Answer 20

the terminating unit at the downstream end of an AN using optical fibre;

Question 21

passive optical network (PON)

Answer 21

optical-fibre AN with no computationalPower;

Question 22

point-to-point

Answer 22

where a connection is exclusive between two points (e.g. localExchange to endUser);

Question 23

pole and duct

Answer 23

over/under-ground wires connecting localLoop points;

Question 24

primary connection point (PCP)

Answer 24

the roadSide greenMetalCabinet in AN;

Question 25

signal-to-noise ratio margin (SNRM) (DSL)

Answer 25

a 6 dB margin on the S/N ratio that ensures BER of 10^-7 or less;

Question 26

splitter

Answer 26

shares an opticalSignal from one fibre between 2+ fibres with no computationalPower;

Question 27

VeryHighBitRateDSL

Answer 27

uses DiscreteMultitoneTransmission but offers a higher upperFrequencyLimit;

Question 28

vectoring (cancel)

Answer 28

where a cancellingSignal is used to eliminate crosstalk;