connectors and cables Flashcards
Twisted pair copper cabling
Balanced pair operation
Two wires with equal and opposite signals – Transmit+, Transmit- / Receive+, Receive-
Keeps a single wire constantly moving
away from the interference
The opposite signals are compared on the other end
Coaxial cables
Two or more forms share a common axis
RG-6 used in television/digital cable
– And high-speed Internet over cable
Plenum-rated cable
Traditional cable jacket - Polyvinyl chloride (PVC)
Fire-rated cable jacket
UTP (Unshielded Twisted Pair)
No additional shielding, The most common twisted pair cabling
STP (Shielded Twisted Pair)
Additional shielding protects against interference, shield each pair and/or the overall cable, requires the cable to be grounded
Direct burial STP
Overhead cable isn’t always a good option, put the cable in the ground
Provides protection from the elements
Optical fiber communication
Transmission by light
No RF signal
Signal slow to degrade
Immune to radio interference
Multimode fiber
Short-range communication
Relatively inexpensive light source
– i.e., LED
Single-mode fiber
Long-range communication
Expensive light source
– Commonly uses lasers
TIA/ETA 568A
White/green, green, white/orange, blue, white/blue, orange, white/brown, brown
Telecommunications Cabling Standard
Commercial Building
TIA/EIA 568B
white/orange, orange, white/green, blue, white/brown, brown
Telecommunications Cabling Standard (more traditionally used)
Commercial building
VGA (Video Graphics Array)
DB-15 connector
Blue color
Analog signal
HDMI (High-Definition Multimedia Interface)
Video and audio stream
19-pin (Type A) connector
DisplayPort
Digital information sent in packetized form
Compatible with HDMI and DVI
DVI (Digital Visual Interface)
Single and dual link
Single link; 3.7 Gbps (HDTV at 60 fps)
Dual link; 7.4 Gbps (HDTV at 85 fps)
No audio support
DVI-A (Analog signals)
DVI-D (Digital signals)
DVI-I (Integrated, Digital and analog in the same connector)