802.3ab
The 802.3ab standard specifies Gigabit Ethernet transfer over Category 5 UTP cable. To achieve the 1000Mbps speeds, each of the four pairs of wires in a twisted-pair cable can transmit 250Mbps. Table 5 summarizes the characteristics of the Gigabit standards.
|
Standard |
Cable Type |
Segment Length |
Connector |
|---|---|---|---|
|
1000BaseLX |
Multimode/single-mode fiber |
550/multimode 5000/single-mode |
Fiber connectors |
|
1000BaseSX |
Multimode fiber |
550 meters using 50 Micron multimode fiber |
Fiber connectors |
|
1000BaseCX |
STP |
25 meters |
9-pin shielded connector, 8-pin fiber channel type 2 connector |
|
1000BaseT |
UTP |
75 meters |
RJ-45 |