BISCI chapter 1 Flashcards
what are 3 Popular coaxial cable type
RG-59
series 11
series 6
Which set of cable specifications provides better performance?
Low dB for insertion loss and high dB for crosstalk
305 meters of cable has an impedance of 100 ohms and 610 meters has an impedance of 200 ohms.
False
What is the power ratio (gain) at 30 dB?
1000%
What is the maximum performance frequency specified for a Category 3 cable?
16 MHz
Based on insertion loss, a lower dB number indicates better cable performance.
True
What electrical property effects return loss?
Impedance
what multimode has the highest Band with
OM4
what multimode has the lowest bandwidth
OM1
What type of optical fiber cable assembly should be used if it is going to be exposed to wide temperature changes?
Loose-tube
Singlemode fiber typically uses a laser light source.
True
What is the diameter of the cladding of an optical fiber strand?
125 µm
What type of connector is used on screened twisted-pair cable?
Shielded modular connector
Series 6 is used in video backbone distribution.
False
what type of cable is a Patch or Equipment cord
Zip cord
what type of cord has a strand coating of 900 micrometres
Tight buffered
what type of cable Contains multiple 900 µm tight-buffered fiber strands
Distribution
what type of cable Contains multiple, jacketed , single-strand cables
Breakout
Based on crosstalk, a higher dB number indicates a better cable performance.
True
what is the appropriate description MHz
Quantifies the bandwidth of a cabling system. this relates to the information-handling capability of the media
what is the appropriate description for Mb
refers to the number of bits of information that can be transported over the media
what is the appropriate impedance for series 6, series 11, and RG-59
75 OHMS
What type of optical fiber cable assembly is typically used inside buildings?
Tight-buffered
TRADE KNOWLEDGE: A horizontal cable is terminated at a WA jacks using the T568A configuration. The other end of the cable is terminated on a BIX block that has 50 termination positions. What are colours of the conductor insulation on termination position 3 and termination 6 of a 25 pair BIX block located in the telecommunication room?
position 3 = White/Orange
position 6 = green/white
A furcation tubing is used to build up the fiber strand’s diameter, to allow direct connectorization.
True
What wavelengths are used with OS1 SM fiber?
1550 mm and 1310mm
Bandwidth does not represent the information-carrying capacity of a system.
false
What wavelengths are used with MM fiber?
1300 nm and 850 nm
What 2 types of coaxial cables may be terminated with BNC connectors?
RG-59 and series 6
What are the typical dimensions of the buffer coating protecting the cladding of the fiber strand? Please select one or more.
250 µm,
900 µm
How many individual NEXT test are done on a 4-pair cable?
12
A communications channel has an attenuation of 6 dB. What is the percentage of the power is lost?
75%
Describe what 8P8C represents.
8 position 8 contact
Which conductor has a lower resistance
22 AWG
What are the core sizes of multimode fiber? Please select one or more
50 µm,
62.5 µm
What type of optical fiber should be used to connect an Horizontal Cross-connect to a Main Cross-connect, 2500 meters apart?
singlemode
Give an example of an application that uses full duplex.
telephone circuit (flux capacitor)
What is the minimum outside diameter of the coating that is applied over the optical fiber cladding?
250 µm
Which Ohm’s law formula is not correct?
I=RV
Which number is a better Next value?
-30 Db
The cladding has a higher refractive index than the core.
false
Along with the dB value, what additional information is requires when reporting Insertion Loss?
Length
AWhat are the typical light sources for MM fiber?
VCSELs,
LED
What are the lowest and highest frequencies TIA Category cables are tested at?
low 16 MHz high 2000 MHz
