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Twisted-Pair (UTP/STP) Wire Requirements
The twisted-pair wiring you use to connect the repeater's RJ-45 ports must meet
the following minimum specifications and requirements to ensure long-term
LAN reliability.
The wiring must be shielded or unshielded twisted-pair (STP/UTP),
Category 5.
Two pairs of wiring are required.
Depending on building codes, different insulation materials may be
required. Plenum-rated or TEFLON-coated wiring may be required in
some areas.
The wire gauge should be between 18 and 26 AWG. (Most telephone
installations use 24-gauge wiring.)
UTP wire should meet the following requirements:
Straight-through twisted-pair cable is typically used to connect a repeater to a
server or workstation. In a straight-through connection, Pin 1 at the repeater
connects to Pin 1 at the server, Pin 2 at the repeater connects to Pin 2 at the
server, and so on. Figure 2-1 shows the locations of pins on a standard RJ-45
plug on a twisted-pair cable.
Solid copper
Nominal capacitance: less than 16 pF/ft
Nominal impedance: 100 Ohms
Nominal attenuation: less than 11.5 db
CAUTION:
Never use gray satin station cable for connecting a repeater.
This flat cable, typically used for connecting telephones to wall jacks, is
incompatible with 10Base-TX systems.
Netelligent 2008/2016 10Base-T Repeater User Guide
2-3
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