REQUIREMENTS AND SPECIFICATIONS
2-2
100 meter (328 ft.) link using 22-26 AWG unshielded
twisted pair wire.
As a general rule, links up to 150 meters (492 ft.) for
unshielded twisted pair and 200 meters (656 ft.) for
shielded twisted pair are possible. For each connector or
patch panel inthe link, subtract 12 meters (39 ft.) from the
150 meter limit.This allows for links of up to 126 meters
(413 ft.) using standard 24 AWG UTP wire and two patch
panels within the link. Higher quality, low attenuation
cables may be required for links of greater than 126
meters. Due to cable delay, themaximum link length is
always limited to about 200 meters,regardless of the cable
type.
•
Insertion Loss
- The maximum insertion loss allowed
for a 10BASE-T link is 11.5 dB at all frequencies
between 5.0 and 10.0 MHz. This includes the
attenuation of the cables, connectors, patch panels, and
reflection losses due to impedance mismatches in the
link segment.
•
Impedance
- Typical unshielded twisted pair cable
impedance is 85 to 110 ohms. Shielded cables, such
as Type 1 cable, can also be used. Type 1 cable
impedance is typically 150 ohms. The higher
impedance increases the signal reflection caused by
Summary of Contents for TPT
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