Planet DHR-800 User Manual page 7

The standards of the Ethernet are defined by the Institute of
Electrical and Electronics Engineers (IEEE). The standard for
traditional Ethernet using hubs and twisted-pair cables is known as
10Base-T. Traditional Ethernet works at a signaling speed of
10Mbps, that is, ten megabits (slightly more than a character) per
second. The Base in 10Base-T stands for "baseband," a one-bit-at-
a-time signaling method; the T stands for twisted-pair cables.
Fast Ethernet was developed to meet the demand for increased
"bandwidth," in other word, greater data-carrying capacity. A fast
Ethernet hub works at 100Mbps, ten times the speed of a 10Base-T
hub.
The IEEE had defined several Fast Ethernet Standards. The hub complies
with the 100Base-TX standard: 100Mbps baseband signaling on twisted-
pair cables, with signals crossing from the Transmit lines to the Receive
lines somewhere between each pair of communication end nodes.
• Fast Ethernet Hub Classes
This hub is a Class II Fast Ethernet hub. This means two things:
1.It will work with Fast Ethernet interface cards of one type only, and
2.It can be connected to another hub for the purpose of expanding the
network.
Note: A Class I hub will work with more than one type of Fast Ethernet
interface card, but cannot be connected to another hub.
• 100Base-TX Fast Ethernet Cabling
The twisted-pair cables used for traditional Ethernet and Fast Ethernet all
look the same on the outside. Such cables, however, come in different
grades and with different wire arrangement, and can have different kinds
of sheathing.
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DHR-800/DHR-800P User's