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Cables & Connectors

Network+ Cables and Connectors

QuestionAnswer
Twisted Pair (TP) Properties -Used for Ethernet and Token Ring networks -Made of insulated copper wires twisted into pairs (at least 2 pairs) -Wire is usually #22-#26 AWG (American Wire Gauge)
Crosstalk When nearby wires carrying signals interfere with each other due to their electromagnetic energy
EMI Electromagnetic Interference
Wire Twisting -Wires are twisted to reduce EMI -Number of twists and interim spacing are specified by industry standards organizations -Standard commercial-grade communications cable supports 2 twists per 11 inches -Wires with a greater the number of twists per 11 i
UTP Unshielded Twisted Pair A type of TP wire that is sheathed in plastic -Commonly used for telephone and LAN communications
Category (Cat) 3 UTP -Supported Gauge(s) -Supported Speeds #24 AWG 1-100Mbps* *at 100 Mbps network problems can occur from EMI
Category 5 UTP Category (Cat) 5 UTP -Supported Gauge(s) -Supported Speeds #24 AWG 1-100 Mbps -Better insulation and more twists/ft. allow Cat 5 to support 100 Mbps transmissions more reliably
Category (Cat) 5e & 6 UTP -Supported Speeds 1-1000 Mbps -Any new installation of UTP wiring should be done with at least Cat 5e
Facts about UTP -Cost -Ease of installation -Capacity -Attenuation -EMI resistance -Relatively low (25-30 cents/ft.) -Relatively easy -1-1000 Mbps (10 and 100 Mbps most common) -Rapid (hundreds of meters) -Susceptible to EMI
STP Shielded Twisted Pair A wiring standard identical to UTP except for two differences: -Copper wire pairs are wrapped in foil to shield against EMI -Uses #22 AWG, a thicker wire that supports longer distances than #24 AWG
Facts about STP -Cost -Ease of installation -Capacity -Attenuation -EMI resistance -Moderate cost (20-40 cents/ft) -Moderate (the shielding foil must be grounded, requiring special connectors) -16, 155, or 500 Mbps (usually 16) -100m for 500 Mbps, longer for lower speeds -Less susceptible than UTP, but not immune
Token Ring Type 1 Cable -Wire type -Number of twisted pairs -STP/UTP -Supported speeds #22 AWG 2 STP 4/16 Mbps
Token Ring Type 2 Cable -Wire type -Number of twisted pairs -STP/UTP #22 AWG 4 UTP (for RS-232 phone service) & STP
Token Ring Type 3 Cable -Wire type -Number of twisted pairs -STP/UTP -Supported speeds #24 AWG 4 UTP 4 Mbps, sometimes 16 Mbps
Token Ring Type 6 Cable -Wire type -Number of twisted pairs -STP/UTP -Supported speeds -Recommended use #26 AWG 4 STP 4/16 Mbps -Patch and adapter cables
RJ-45 Ethernet Pinout 1: Transmit + 2: Transmit - 3: Receive + 4: Not used 5: Not used 6: Receive - 7: Not used 8: Not used
RJ-45 Token Ring Pinout 1: Not used 2: Ground 3: Transmit + 4: Receive + 5: Receive - 6: Recovery 7: Ground 8: Not used (set aside for future offerings)
RJ-45 A 8-pin modular plug that is used to terminate UTP and STP cable. -It is used for many different applications. -Make sure that you know what is being transmitted on a cable before plugging it in. Some applications of RJ-45 and UTP might damage hardware
DB-9 Pinout 1: Receive + 2: Not used 3: Not used 4: Not used 5: Transmit+ 6: Receive- 7: Not used 8: Not used 9: Transmit +
IBM Data Connector Pinout and notes 1: Transmit - 2: Transmit + 3: Receive - 4: Receive + When there is no connection, Pins 1 and 2 ground to pins 3 and 4, respectively, creating a current loop. Each connector is hermaphroditic
Hermaphroditic In networking, a connector that is constructed in a way that allows it to connect with another of the same connector.
RJ-11 Pinout 1: Transmit + 2: Receive + 3: Receive - 4: Transmit -
RJ-14 Pinout 1: Transmit + 2: Receive + 3: Receive - 4: Transmit -
Optical Fiber Cable -Acronym -Markings: -Plenum -Riser -Commercial -Residential OFC FPLP FPLR FPL none
Communications -Acronym -Markings: -Plenum -Riser -Commercial -Residential CM CMP CMR CM CMX
Multipurpose -Acronym -Markings: -Plenum -Riser -Commercial -Residential MP MPP MPR MP none
Cable TV -Acronym -Markings: -Plenum -Riser -Commercial -Residential CATVP CATVR CATV CATVX
T568A Ethernet Pinout 1: White/Green (W/G) 2: Green (G) 3: White/Orange (W/Or) 4: Blue (Bl) 5: White/Blue (W/Bl) 6: Orange (Or) 7: White/Brown (W/Br) 8: Brown (Br)
T568B Ethernet Pinout 1: White/Orange (W/Or) 2: Orange (Or) 3: White/Green (W/G) 4: Blue (Bl) 5: White/Blue (W/Bl) 6: Green (G) 7: White/Brown (W/Br) 8: Brown (Br)
IEEE 1394 An external serial bus standard with speeds of up to 400 Mbps Also known as FireWire (tm) Used mainly for connecting peripherals to computers Can also be used for basic file sharing if IEEE 1394 NICs are installed Uses #28 AWG
IEEE 1394 Specs -Speeds -Max. Devices / Bus -Max. Linked Buses -Max Distance 100, 200, and 400 Mbps 63 1,024 15 ft (this can be extended (to 225 ft. by using repeaters or by using other than the default cable)
IEEE 1394 6-Wire STP -Architecture -Connector Type 2 pairs of separately shielded wire pairs and two power wires encased in an overall shielded cable 6-pin connector on both ends
IEEE 1394 4-Wire STP -Architecture -Connector Type 2 pairs of separately shielded wire pairs encased in an overall shielded cable, no power wires 4-pin connector on both ends
IEEE 1394 N-Wire STP -Architecture -Connector Type Either type of wire 4-pin connector on one end, 6-pin on the other
IEEE 1394 Data Transmission Modes Asynchronous - Data transfer is irregular Isochronous - Data flows at a steady, guaranteed rate (useful for AV applications)
Created by: ibnpaul