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Dan2024 Study > Fiber-General-Quizlet > Flashcards

Fiber-General-Quizlet Flashcards

1
Q

How many fibers can be in a buffer tube

A

12

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2
Q

This fiber archetcitctur removes all acitve devices in
plant

A

Fiber Deep

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3
Q

Fiber deep nodes are within how many feet of the
customer premise

A

1,000 ft

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4
Q

Fiber deep uses a mid split between what frequencies on
US

A

5Mhz - 85 Mhz upstream

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5
Q

Fiber deep uses what
frequencies for DS

A

108 Mhz to 1.2 GHz

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6
Q

PHY refers to this layer of the
OSI model

A

Layer 1

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7
Q

In a fiber deep system that uses a distributed access architecture and is being moved from the CMTS to the
node

A

Remote PHY

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8
Q

DAA

A

distributed access architecture

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9
Q

FiberDeep uses this
wavelength in both the upstream and downstream

A

1550 nm

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10
Q

In a fiber deep architecture this is used instead of
frequency

A

Wavelength

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11
Q

In a fiber deep architecture
light is measured in

A

nanometers (nm)

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12
Q

the number of cycles an alternating current waveform in one second is

A

Hertz

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13
Q

We can use both US and DS on same wavelenght because
of this multiplexing

A

DWDM

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14
Q

Visible light is between which
wavelengths

A

390 - 780 nm (NCT5) or 750 -400 (61)

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15
Q

Infared wavelngths are
between these wavelengths

A

850nm - 1650 nm

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16
Q

Wavelengths are typically abbreviated by this Greek
Letter

A

Lambda

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17
Q

light and radio waves travel at a speed of, meters per
second in a vaccum

A

300 million

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18
Q

Velocity is represented by this
letter

A

c

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19
Q

As the frequency increases
the wavelength

A

Decreases

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20
Q

WDM

A

Wavelength Division Multiplexing

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21
Q

CWDM

A

Coarse Wave Division Multiplexing

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22
Q

DWDM

A

Dense Wave Divison Multiplexing

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23
Q

Fiber drops must pass all required optical wavelengths CWDM and DWDM between
this

A

1260- 1625 nm

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24
Q

CWDM channel spacing nm
and GHz

A

20 nm, 1500 GHz

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25
Q

What is the maximum number of wavelengths for CWDM

A

18 wavelengths

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26
Q

What channels are used for
CWDM fiber networks

A

1270nm - 1610 nm

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27
Q

DWDM spaced at 200 GHZ in
nm

A

1.6 nm

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28
Q

DWDM spaced at 100 GHz in nm

A

.8nm

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29
Q

DWDM spaced at 50 GHz in
nm

A

.4nm

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30
Q

DWDM spaced at 25 GHz in
nm

A

.2nm

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31
Q

DWM spaced at 12.5 GHz in
nm

A

.1nm

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32
Q

At wavelength does DWDM
operate at

A

1550 nm

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33
Q

RFoG DS wavelength

A

1550 nm (77)

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34
Q

RFoG US wavelength

A

1610/1310 nm

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35
Q

Fiber deep uses the
wavelength for US and DS

A

1550 nm

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36
Q

1 Gb GPON DS

A

1490 nm

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37
Q

1Gb GPON US

A

1310 nm

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38
Q

10Gb EPON DS

A

1577 nm

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39
Q

10Gb EPON US

A

1270 nm

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40
Q

FDC

A

Fiber Distributed Cabinet

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41
Q

What technology is used as part of the overlay concept, to segment the network area into smaller groups without investing in additional fiber
construction

A

WDM

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42
Q

This fiber architecture sets the
path for 4096 QAM

A

DAA (distributed access architecture

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43
Q

This type of tap requires plug-in modules to adjust for
appropriate levels

A

Tap conditioning

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44
Q

Proper tilt range for tap
conditioning

A

8-10 dB

45
Q

process of seprating the various colors of white light using this

A

prism

46
Q

Fibers with a larger core that supports more than one
mode

A

multi-mode

47
Q

This type of module for tap conditoning is used to lower the low frequenices will little impact on the higer
frequencies

A

Forward EQ

48
Q

module for tap conditioning used to lower the higer frequencies and little impact
on lower freqs.

A

Cable simulator

49
Q

This is the reflection of the total amount of the incident
of light that occurs

A

TIR ( Total Internal Reflection)

50
Q

TIR

A

Total Internal Reflection

51
Q

IoR

A

Index of Refraction

52
Q

Light propagates inside the core of the fiber by the
means of this

A

TIR

53
Q

Light passing from a lower density material to a higher
denisty material this happens

A

refracted toward the normal

54
Q

is the angle between the
incident ray and the normal

A

angle of incidence

55
Q

Imperfections in the fiber and impurities caused when making the structure of the fiber will cause signal loss in
the form of these two types

A

Scattering and Absorbtion

56
Q

angle between refracted ray
and the normal

A

angle of refraction

57
Q

the spreading in time of the optical signal as it travels down the length of the fiber

A

Dispersion

58
Q

Name 4 types of dispersion

A

modal, chromatic, waveguide, polarization-mode

59
Q

results when different wavelengths travel through a
fiber at different velocities

A

Chromatic dispersion

60
Q

small amount of light travels
in the interface between the core and the cladding

A

Waveguide dispersion

61
Q

is the most common cause of dispersion in multimodes
fiber

A

modal dispersion

62
Q

When the vertical and horizontally polarized componets travel through the
fiber at different velocities

A

Polarization-mode

63
Q

occurs when 2 components
travel at different velocities

A

Dispersion

64
Q

is the loss of optical energy
due from imperfections in the fiber

A

scattering

65
Q

changes in the density of the fiber and variations of the compostion that occur during
manufactiruing

A

Rayleigh scattering

66
Q

This is the intrinsic loss of the
fiber

A

Absorption

67
Q

this is composed of those
reflections that are reflected towards the input of the fiber

A

Back scattering

68
Q

sun light is always absorb into
the impurities of the glass structure and disipate as this

A

heat

69
Q

The least absorption rate of sunlight into the glass occurs between these wavelengths

A

1310-1550nm

70
Q

This type of dispersion is based on the color of light traveling through the fiber
core

A

Chromatic dispersion

71
Q

Signal loss inside fiber can be the result of the installaiton
methods known as

A

extrinsic loss

72
Q

Occurs when the fiber is bent
to sharply

A

Macrobend

73
Q

Name 2 types of extrinisic
loss on fibers

A

Macrobend and Microbend

74
Q

Term used, to describe technologies that take fiber optic calbes all the way to the customer premises, removing
all the coax

A

FTTP

75
Q

RFoG system communicates
with this device at the HE

A

CMTS

76
Q

Name the 2 types of FTTP architecture that we deliver to
our customers

A

RFoG, EPON

77
Q

This type of FTTP technology that uses the same type of
signals as an HFC network

A

RFoG

78
Q

To achieve greater distances for a FTTP network this device
is used in RFoG

A

EDFA (Erbium Doped Fiber Amplifier}

79
Q

PON

A

Passive Optical Network

80
Q

EDFA can produce an signal
output of

A

(+) 26 dBm

81
Q

The difference between
RFoG and HFC laser

A

RFoG uses EDFA

82
Q

EPON uses this type of multiplexing

A

Time Divison Multiple Access (TDMA)

83
Q

Covential HFC transmitters produce an out put a signal
of

A

(+) 6 dBm thru +10 dBm

84
Q

ODN

A

Optical Distribution Network

85
Q

Signal type RFoG uses to
send data

A

DOCSIS Frames

86
Q

EPON uses this signal type to
send data

A

Ethernet frames

87
Q

GPON data packets are
called

A

GPON Encapsulation Methond (GEM)

88
Q

Two Challenges in the RFoG
architecture

A

Optical loss, transmission in the Upstream

89
Q

EPON architecute terminates
here at the HE

A

OLT (Optical Line Terminal)

90
Q

EPON network doesn’t need this type of optical transmitter
over ther network

A

EDFA (Erbium Doped Fiber Amplifier}

91
Q

This device will take incoming optical signal and convert it
to the traditional RF signal

A

R-ONU

92
Q

This device acts as an interface between the ODN
and the CPE

A

Mini node

93
Q

In the outside cable plant this converts fiber optics connections to coaxial
connections

A

Node

94
Q

To extend RFOG architecture an EDFA is required if the distance is greater than this

A

20 km

95
Q

EPON architecture can
extend how far

A

20 Km

96
Q

1’s and 0’s along the EPON path is called

A

Binary bits

97
Q

EPON connects to this device
at the house

A

ONU

98
Q

GPON was developed by the
this oraganization

A

ITU (International Telecommunication Union)

99
Q

The optical transmittter produces light at how many
intesities

A

2

100
Q

High intensity light at the OLT
represents this

A

Binary 1

101
Q

Low intensity light at the OLT
represents this

A

Binary 0

102
Q

The ONU will hae this type of
specialized fiber connector

A

SC/APC

103
Q

On the distribuiton portion of the network this device
transitions the optical to coax

A

Node

104
Q

HFC are sending this type of
modulation into the node

A

AIM

105
Q

HFC are transmitting this type
of modulaiton out of the node

A

QAM

106
Q

GPON terminates at the cpe
side called

A

Optical Network Terminal (ONT)

107
Q

Can be used to test for the
presence of light between 850 - 1550 nm

A

Photosentive card

108
Q

an aboslute power
referenced to 1 mV

A

dBmv

109
Q

Inside the R-ONU there is a
device called this

A

Mini node

Dan2024 Study (47 decks)

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