Ch. 3 (ITS Cables and Connecting Hardware) Flashcards
Screened twisted pair
Drain wire
Common styles of screening
Foil
Braid
Stranded vs. solid conductors
20% to 50% more attenuation
Loose tube fiber characteristics
50 or 62.5 µm core
125 µm cladding
Loose tube fiber characteristics
Uses an LED or VCSEL
Loose tube fiber applications
Suitable up to 2000 meters
Loose tube fiber wavelengths
850 & 1300 nanometers
Most common coaxial cables
Series 6
Series 11
RG59
Coaxial cable characteristics
Centered inner conductor
Coaxial cables or series X cables
X designates the construction type
IDC =
Insulation displacement contact
IDC connectors
Gas-tight physical contact
8P8C
8 position 8 contact connector
Difference between T568A and T568B
Pairs 2 and 3 are flipped
Standard rackmount
19 and 23 inch
Hybrid fiber patch cord
SC/ST example
66 Block does not support ___
Cat 6
In T568B what color are pins 3 & 6?
Green
Stranded loss
ISO - 50%
TIA - 20%
Cable separation requirements
Powerlines in conduit - 6”
Unshielded power lines in conduit - 12”
Open pathways - 24”
Electric motors & transformers - 47”
Fiber modal bandwidth measured in ___
MHz/km
Double ended patch cords attach ___ to ___
Connecting hardware to connecting hardware
Best screen for lower frequency electromagnetic fields
Braid
OM3 bandwidth rating
2000 MHz/km @ 850 nm
500 MHz/km @ 1300 nm
F-style connector is ___ more reliable than the BNC-style
Not
Single ended cords connect ___
Equipment directly to the back of connecting hardware
Secondary transmission parameters for balance twisted-pair
NVP
Propagation delay
Return loss
Except “inductance”
ISO class E
Cat 6
RF antenna connectors
50 ohm BNC
Tight buffered fiber attenuates at ___ temperatures
Lower
BICSI Recommendation
Cat 6
