3Com Baseline 2226-PWR Plus User Manual

Also see for 3C16475BS: Datasheet

Contents

G LOSSARY10BASE-TThe IEEE specification for 10 Mbps Ethernet over Cat-egory 3, 4 or 5 twisted pair cable.100BASE-TXThe IEEE specification for 100 Mbps Fast Ethernetover Category 5 twisted-pair cable.1000BASE-LXIEEE 802.3z specification for Gigabit Ethernet over9/125 micron core single-mode fiber cable.1000BASE-SXIEEE 802.3z specification for Gigabit Ethernet overtwo strands of 50/125 or 62.5/125 micron core multi-mode fiber cable.1000BASE-TIEEE 802.3ab specification for Gigabit Ethernet over100-ohm Category 5, 5e or 6 twisted-pair cable(using all four wire pairs).autonegotiationAutonegotiation is where two devices sharing a link,automatically configure to use the best commonspeed. The order of preference (best first) is:1000BASE-T full-duplex, 100BASE-TX full-duplex,100BASE-TX half-duplex, 10BASE-T full-duplex, and10BASE-T half-duplex. Autonegotiation is defined inthe IEEE 802.3 standard for Ethernet and is an opera-tion that takes place in a few milliseconds. Autonego-tiation must be enabled for the 1000BASE-T ports tooperate at 1000 Mbps, full-duplex.bandwidthThe information capacity (measured in bits per sec-ond) that a channel can transmit. The bandwidth ofEthernet is 10 Mbps, the bandwidth of Fast Ethernetis 100 Mbps and Gigabit Ethernet is 1000 Mbps.category 3 cableOne of five grades of Twisted Pair (TP) cabling definedby the EIA/TIA-568 standard. Category 3 is voicegrade cable and can only be used in Ethernet net-works (10BASE-T) to transmit data at speeds of up to10 Mbps.category 5 cableOne of five grades of Twisted Pair (TP) cabling definedby the EIA/TIA-568 standard. Category 5 can be usedin Ethernet (10BASE-T) and Fast Ethernet networks(100BASE-TX) and can transmit data at speeds of upto 100 Mbps. Category 5 cabling is better to use fornetwork cabling than Category 3, because it supportsboth Ethernet (10 Mbps) and Fast Ethernet (100Mbps) speeds.