Installation manual

Cabling
23
These can appear to be similar externally, and their DC
characteristics are also similar, although their AC characteristics,
and therefore high-speed data transmission characteristics, are
radically different. As a rule of thumb, if a cable type is flat, it is
typically untwisted, and will cause problems. If a cable is more or
less round in section, it will typically work.
If any voice-quality cabling is used in a 10BASE-T network
system, data movement is slow, collision-prone, or non-existent.
The LNK indicator on the interface will usually indicate a valid
link in such a case. Be sure that all cabling used with the 10BASE-
T adapter card connections is of level 3, 4, or 5.
4
Unshielded
Enhanced Indv.
Twisted Pairs
100 Ω
± 30 Ω
EIA, TIA
10BASE-T
NEMA
5-8 YES
5
Shielded
Indv. Twisted Pairs
100 Ω
± 30 Ω
EIA, TIA
10BASE-T
8-10 YES
Table 6: Usable and Unusable 10BASE-T Cable (Continued)
Cable
Level
Cable
Description
AC
Char.
Specifi-
cation
Twist/
Foot
10BASE-T
OK?