Cable Specifications - Ruby Tech 24-Port 100BaseTX + 2-P User Manual

Specifications

Cable Specifications

Straight-Through and Crossed-Over Cable Specifications Table lists the cables
you can use and their specifications.
Caution: Please do not use telephone cables. Telephone cables do not support
Ethernet or Fast Ethernet.
Straight-Through and Crossed-Over Cable Specifications Table
Ethernet Type
10BASE-T
100BASE-TX
1000BASE-T
Twisted-pair cabling comes in various grades, or categories. Category 5 is required for
Fast Ethernet, and is also the most reliable and most commonly used category. You
can buy UTP Category 5 (Unshielded Twisted Pair) Ethernet cabling in precrimped
lengths, or you can crimp your own. Crimping your own can result in faulty connections
if the
RJ-45 tips are not attached properly. Precrimped Category 5 cabling is available at
most computer retail stores.
The most reliable and commonly used type of Category 5 cabling used is UTP, or
"unshielded twisted pair." STP, or "shielded twisted pair" wiring is only necessary for
network environments exposed to excessive amounts of electromagnetic interference,
or EMI. These environments include areas with high sources of electrical power, air
conditioning, generators, and radio signals. STP is also used for wiring outdoors.
There are two types of the wiring: Straight-Through Cables and Crossover Cables.
Category 5 UTP/STP cable has eight wires inside the sheath. The wires form four pairs.
Straight-Through Cables has same pinouts at both ends while Crossover Cables has a
different pin arrangement at each end.
In a straight-through cable, wires 1,2,3,4,5,6,7 and 8 at one end of the cable are still
wires 1~8 at the other end. In a crossover cable, the wires of 1,2,3,6 are reversed so
that wire 1 become 3 at the other end of the cable, 2 becomes 6, and so forth.
Cable Requirements
Category 3 or better, UTP or STP
Category 5 or better, UTP or STP
Category 5e or better, UTP or STP
40
Gigabit Smart Switch
Maximum Length
328 ft (100M)
328 ft (100M)
328 ft (100M)