Fiber Flashcards
62.5/125-µm multimode cable (OM1) attenuation at 850nm
3.5
62.5/125-µm multimode cable (OM1) attenuation at 1300nm
1.5
62.5/125-µm multimode cable (OM1) bandwidth MHz-km at 850nm
200 (OFL)
62.5/125-µm multimode cable (OM1) bandwidth MHz-km at 1300nm
500
50/125-µm multimode cable (OM2) bandwidth MHz-km at 850nm
500 (OFL)
50/125-µm multimode cable (OM2) bandwidth MHz-km at 1300nm
500
50/125-µm multimode cable (OM2) attenuation at 850nm
3.5
50/125-µm multimode cable (OM2) attenuation at 1300nm
1.5
50/125-µm multimode cable (OM3) attenuation at 850nm
3.5
50/125-µm multimode cable (OM3) attenuation at 1300nm
1.5
50/125-µm multimode cable (OM3) bandwidth at 850nm
1500 (OFL)
2000 (EMB)
50/125-µm multimode cable (OM3) bandwidth at 1300nm
500
50/125-µm multimode cable (OM4) attenuation at 850nm
3.5
50/125-µm multimode cable (OM4) attenuation at 1300nm
1.5
50/125-µm multimode cable (OM4) bandwidth at 850nm
3500 (OFL)
4700 (EMB)
50/125-µm multimode cable (OM4) bandwidth at 1300nm
500
50/125-µm multimode cable (OM5) attenuation at 850/880nm
3.0
50/125-µm multimode cable (OM5) attenuation at 910/940nm
3.0
50/125-µm multimode cable (OM5) bandwidth at 850/880nm
3500 (OFL)
4700 (EMB) at 850
50/125-µm multimode cable (OM5) bandwidth at 910/940nm
3500 (OFL)
4700 (EMB) at 850
Singlemode cable (OS1) (grandfathered) attenuation at 1310 nm
1.0
Singlemode cable (OS1) (grandfathered) attenuation at 1550 nm
1.0
Singlemode cable (OS1a) attenuation at 1310 nm
1.0
Singlemode cable (OS1a) attenuation at 1383 nm
1.0
Singlemode cable (OS1a) attenuation at 1550 nm
1.0
Singlemode cable (OS2) attenuation at 1310 nm
0.4
Singlemode cable (OS2) attenuation at 1383 nm
0.4
Singlemode cable (OS2) attenuation at 1550 nm
0.4
Singlemode cable bandwidth, at any wavelength
N/A
Distance supported by OM1 at 100Mb speed?
550m, 1800 ft
Distance supported by OM1 at 1Gb speed?
220m, 722 ft
Distance supported by OM1 at 10Gb speed?
33m, 108 ft
Distance supported by OM2 at 100Mb speed?
550m, 1800 ft
Distance supported by OM2 at 1Gb speed?
550m, 1800 ft
Distance supported by OM2 at 10Gb speed?
82m, 269 ft
Distance supported by OM2 at 40Gb speed?
N/A
Distance supported by OM1 at 40Gb speed?
N/A
Distance supported by OM2 at 100Gb speed?
N/A
Distance supported by OM1 at 100Gb speed?
N/A
Distance supported by OM3 at 100Gb speed?
100m, 328 ft
Distance supported by OM3 at 40Gb speed?
100m, 328 ft
Distance supported by OM3 at 10Gb speed?
300m, 984 ft
Distance supported by OM3 at 1Gb speed?
550m, 1800 ft
Distance supported by OM3 at 100Mb speed?
550m, 1800 ft
Distance supported by OM4 at 100Mb speed?
550m, 1800 ft
Distance supported by OM4 at 1Gb speed?
550m, 1800 ft
Distance supported by OM4 at 10Gb speed?
550m, 1800 ft
Distance supported by OM4 at 40Gb speed?
150m, 500 ft
Distance supported by OM4 at 100Gb speed?
150m, 500 ft
Distance supported by OM5 at 100Mb speed?
N/A
Distance supported by OM5 at 1Gb speed?
N/A
Distance supported by OM5 at 10Gb speed?
550m, 1800 ft
Distance supported by OM5 at 40Gb speed?
150m, 500 ft
Distance supported by OM5 at 100Gb speed?
150m, 500 ft
Distance supported by singlemode at 100Gb speed?
10,000m, 32,800ft
Distance supported by singlemode at 40Gb speed?
10,000m, 32,800ft
Distance supported by singlemode at 10Gb speed?
10,000m, 32,800ft
Distance supported by singlemode at 1Gb speed?
10,000m, 32,800ft
Distance supported by singlemode at 100Mb speed?
N/A
For multimode testing, light source or OTDR must operate within range of 850 ± __nm or 1300 ± __ nm.
850 ± 30nm or 1300 ± 20nm
For singlemode testing, light source or OTDR must operate within range of 1310 ± __nm or 1550 ± __ nm.
1310 ± 10 nm or 1550 ± 20nm
Maximum channel attenuation for IEEE 802.3 EPON
20dB
Maximum channel attenuation for IEEE 802.3av 10G-EPON
29dB
Maximum channel attenuation for ITU G.984 GPON (B+ Optics)
28dB
Maximum channel attenuation for ITU G.984 GPON (C+ Optics)
32dB
Maximum channel attenuation for ITU G.987 10GPON
31dB
Maximum distance supported for ITU G.984 GPON (B+ Optics)
20.1 km, 12.5 mi
Maximum distance supported for for ITU G.984 GPON (C+ Optics)
60 km, 37 mi
Maximum distance supported for for ITU G.987 10GPON
40 km, 25 mi
Maximum distance supported for for IEEE 802.3av 10G-EPON
20.1 km, 12.5 mi
Maximum distance supported for for IEEE 802.3 EPON
10 km, 6.2 mi
What is the dB loss from mechanical splices in multimode and singlemode fiber?
0.3 dB
What is the dB loss from fusion splices in multimode fiber?
0.1 dB
What is the dB loss from fusion splices in singlemode fiber?
0.05 dB
How many fiber strands does 40GB use?
2 or 8
How many fiber strands does 100GB use?
4, 8, or 20
How many fiber strands does 200GB use?
8
How many fiber strands does 50GB use?
2
How many fiber strands does 400GB use?
8 or 32
Multimode optical fiber is best suited for premises applications where links are less than ____ for data rates of 155 Mb/s or less.
2000m, 6562 ft
Multimode optical fiber is best suited for premises applications where links are less than ____ for data rates of 1 Gb/s or less.
550m, 1804 ft
Multimode optical fiber is best suited for premises applications where links are less than ____ for data rates of 10Gb/s or less.
300m, 984 ft
Multimode optical fiber is best suited for premises applications where links are less than ____ for data rates of 100Gb/s or 40Gb/s or less.
100m, 328 ft
How many connection points are allowed in the permanent link?
3
How many connection points are allowed in the channel model?
4
How many levels of cross-connections are allowed in a backbone distribution system?
2
Connections between any two HCs (FDs) shall not pass through more than _ cross-connections.
3
What band is very low frequency?
Audio, 3-30 kHz
What band is low frequency?
Audio, 30-300 kHz
What band is medium frequency?
Radio (RF), 300-3000 kHz
What band is high frequency?
Radio (RF), 3-30 MHz
What band is very high frequency?
Video (TV) and Radio (RF), 30-300 MHz
What band is ultra high frequency?
Video (TV) and Radio (RF), 300-3000 MHz
What band is community antenna TV?
Video (TV), 54-1002 MHz
What band is super high frequency?
Radar, 3-30 GHz
What band is extremely high frequency?
Radar, 30-300 GHz
What is the minimum space for first five tenants in a Grade 1 multi-welling unit CTR?
14.5 in wide, 24 in high
What is the minimum space for first five tenants in a Grade 2 multi-welling unit CTR?
30.5 in wide, 24 in high
What is the minimum additional space per tenant after the first five tenants in a Grade 1 multi-welling unit CTR?
50 in²
What is the minimum additional space per tenant after the first five tenants in a Grade 2 multi-welling unit CTR?
100 in²
What is the minimum telecom room size for a serving area of 5000 ft² or less?
10 ft by 8 ft
What is the minimum telecom room size for a serving area between 5000 ft² and 8000 ft²?
10 ft by 9 ft
What is the minimum telecom room size for a serving area between 8000 ft² and 10,000 ft²?
10 ft by 11 ft
What is the maximum serving area size by a wall cabinet, self contained cabinet, or enclosed cabinet?
1,000 ft²
What is the maximum serving area size by a shallow room?
5,000 ft²
What type of cabling facility may be housed in a telecommunications room (TR)?
Floor, building, or campus distributor
Radiating coaxial cabling antennas offer wide bandwidth for combined systems, with operating frequencies ranging from ___ to more than ___
70 MHz; 2.4 GHz
In analog video signaling, which one of the following is the most common combination of video signals in both professional AV and home recording devices?
Composite video
Vacancy sensors for lighting control save ___ energy than occupancy sensors for lighting control.
More
Each port on a network switch represents a different ____ domain.
Collision
When describing control protocol standards for audiovisual (AV) systems, universal serial bus (USB) version 3.2 has a maximum bandwidth of:
20 Gb/s
For an optical fiber system, the essential determinants of end-to-end bandwidth are the:
Transmitter and the optical fiber
In an exclusive communication environment, the electronic access control (EAC) data is kept on its own physical network that often relies on a ____ topology.
Loop or star
Modular UPS units typically use ____ technology, with each module sized to handle a portion of the overall load.
Line-interactive
In the Open Systems Interconnection (OSI) Reference Model, the data is transmitted from the _ layer of the sending system to the _ layer in the receiving system.
Lowest; lowest
Copper patch cords should be constructed with ____ cable.
Stranded
When designing the switchboard in a direct current (dc) power system, the inverter should be located near the ____ to reduce induced electrical noise on the protected alternating current (ac) distribution.
ac loads
Equipment rooms are generally considered to serve a:
Building, campus, tenant, or service provider
When describing control panel standards for audiovisual (AV) systems, the IEEE 1394a standard has a maximum data transfer rate of:
400 Mb/s
In most cases, interconnection is ____ in the HC (FD) for passive connections between horizontal and backbone cabling systems.
Not allowed
Which one of the following project management tools Uses network diagrams to identify predecessor and successor relationships on projects?
Program evaluation and review technique (PERT)
At voice frequencies, the principal elements contributing to loss and phase distortion are:
Conductor resistance and mutual capacitance of a cable pair
A(n) ____ UPS topology is usually reserved for large critical facilities. This topology involves multiple large UPS units connected to output paralleling switchgear that are tied together.
Ring bus
Telephone cables have a characteristic impedance that depends on frequency. In voice-band applications, an impedance of ____ is preferred for trunks.
600 ohms
In a cable television distribution system, the subscriber drop is connected to the distribution system at the:
Tap
Lighting may account for up to ___ percent of the electrical operation costs in a commercial building.
40
Most project management (PM) software tools include the work breakdown structure (WBS) as part of the ___ chart.
Gantt
In Europe, the first level of TDM is ___ with a transmission rate of ___
E1 , 2.048 Mb/s
A telecommunications enclosure can be used as a replacement for a
telecommunications room.
False
The MC (CD) should be close to (if not located in) the main:
Equipment Room
To ensure general audibility, in the United States, NFPA 72 require that public mode fire alarm signaling achieves output levels of ___
over average ambient sound (dBA) levels.
15 dB
When describing control panel standards for audiovisual (AV) systems, RS-422 uses a balanced signal with a maximum data rate of:
10 Mb/s
The primary function of a telecommunications room or enclosure is to house active devices that are served by the backbone cabling.
False
A spare digital alarm radio receiver (DARR) is available in the supervising station and can be switched into the place of a failed unit within ___ after the detection of failure.
30 seconds
____ is the minimum acceptable performance for balanced twisted-pair network cabling.
Category 3 / class C
Which one of the following is not an example of a typical internal EMI source?
Electric motors
The term broadband video refers to composite baseband video and audio signals that are amplitude and frequency modulated respectively, with an RF carrier in accordance with the video and audio information that need to be conveyed.
True
Reactance is the opposition to the flow of alternating current (ac) caused by:
Inductance and capacitance
