NCTI Fiber Testing & Maintenance
Exam Questions & Answers12
What is the key benefit of using a DOCSIS-based CMTS? - ANSWERS-Increased network
reliability and improved technician access
to critical network data.
What should inspections of fiber-optic aerial plants include? - ANSWERS-Safely make a repair on
the spot if the problem represents a potential safety hazard or imminent risk to system
operations.
What can using an OTDR to measure loss in a dark fiber accomplish? - ANSWERS-Help identify a
fault's possible cause and location on an active fiber.
Besides an OTDR, what additional equipment is required when testing DWDM systems? -
ANSWERS-An OSA to properly monitor performance.
Which is true regarding the operating parameters of a fiber node? - ANSWERS-No further action
is required if optical power is within +/-0.5 dBm of the original acceptance documentation.
Why is DWDM technology significant in a fiber-optic transmission network? - ANSWERS-It
transmits multiple wavelengths over one fiber.
Why should fiber routes near construction activities be located and identified? - ANSWERS-To
prevent underground failures or unexpected damage caused by construction activities.
What is involved in the review of the headend and remote hub facilities? - ANSWERS-Examining
and assessing the equipment, infrastructure, and operations
, What type of interface is common on new-generation optical meters? - ANSWERS-USB
Optical power meters used for testing FTTx installations operating downstream from the
headend should be calibrated for which
wavelengths? - ANSWERS-1490, 1550, and 1577
Besides a stabilized light source, an enhanced optical power meter, and an optical talk set, what
else do optical loss test sets include in their combined features? - ANSWERS-An ORL meter
What do most optical power meters require when measuring transmit and receive power? -
ANSWERS-Annual calibration that is traceable to the NIST
What must be done first when measuring end-to-end attenuation using the optical power
meter? - ANSWERS-The light source and optical power meter must be referenced together
before taking measurements
What do most models of laser light sources use as operational status indicators? - ANSWERS-
Controls for turning the light source on and off, selecting the laser wavelength for testing, and
selecting the modulation signals; display indicators for the selected wavelength, mode of
operation, battery status, and power source.
What occurs when a laser light source is used with an optical fiber identifier to test fibers? -
ANSWERS-A 2-kHz modulation provides a test signal allowing the fiber under test to be detected
by the optical fiber identifier.
Besides determining whether the light is on fiber and the light is modulated and carrying traffic,
what does is the third function the optical fiber identifiers determine? - ANSWERS-The direction
from which the light is coming.
Exam Questions & Answers12
What is the key benefit of using a DOCSIS-based CMTS? - ANSWERS-Increased network
reliability and improved technician access
to critical network data.
What should inspections of fiber-optic aerial plants include? - ANSWERS-Safely make a repair on
the spot if the problem represents a potential safety hazard or imminent risk to system
operations.
What can using an OTDR to measure loss in a dark fiber accomplish? - ANSWERS-Help identify a
fault's possible cause and location on an active fiber.
Besides an OTDR, what additional equipment is required when testing DWDM systems? -
ANSWERS-An OSA to properly monitor performance.
Which is true regarding the operating parameters of a fiber node? - ANSWERS-No further action
is required if optical power is within +/-0.5 dBm of the original acceptance documentation.
Why is DWDM technology significant in a fiber-optic transmission network? - ANSWERS-It
transmits multiple wavelengths over one fiber.
Why should fiber routes near construction activities be located and identified? - ANSWERS-To
prevent underground failures or unexpected damage caused by construction activities.
What is involved in the review of the headend and remote hub facilities? - ANSWERS-Examining
and assessing the equipment, infrastructure, and operations
, What type of interface is common on new-generation optical meters? - ANSWERS-USB
Optical power meters used for testing FTTx installations operating downstream from the
headend should be calibrated for which
wavelengths? - ANSWERS-1490, 1550, and 1577
Besides a stabilized light source, an enhanced optical power meter, and an optical talk set, what
else do optical loss test sets include in their combined features? - ANSWERS-An ORL meter
What do most optical power meters require when measuring transmit and receive power? -
ANSWERS-Annual calibration that is traceable to the NIST
What must be done first when measuring end-to-end attenuation using the optical power
meter? - ANSWERS-The light source and optical power meter must be referenced together
before taking measurements
What do most models of laser light sources use as operational status indicators? - ANSWERS-
Controls for turning the light source on and off, selecting the laser wavelength for testing, and
selecting the modulation signals; display indicators for the selected wavelength, mode of
operation, battery status, and power source.
What occurs when a laser light source is used with an optical fiber identifier to test fibers? -
ANSWERS-A 2-kHz modulation provides a test signal allowing the fiber under test to be detected
by the optical fiber identifier.
Besides determining whether the light is on fiber and the light is modulated and carrying traffic,
what does is the third function the optical fiber identifiers determine? - ANSWERS-The direction
from which the light is coming.
