
Cabling
23
NOTE 1. To use IBM Type 1 cable, the 150
Ω
Twisted Pair Type selection must
be made in your computer manufacturer’s Configuration software.
Table 4: Usable and Unusable 10BASE-T Cable
Cable
Level
Cable
Description
AC
Character
Specification
Twist/
Foot
10BASE-T
OK?
1
Unshielded
untwisted
N/A
CCITT
N/A
NO!
2
Individual UTP
100
Ω ±
30
Ω
RS232
1BASE5
AT&T PDS
N/A
NO!
3
Typical
individual UTP
100
Ω
±
15
Ω
TI, AT&T ISDN
10BASE-T
IBM Type 3
3-5
YES
4
Enhanced
individual UTP
100
Ω
±
30
Ω
EIA, TIA
10BASE-T
NEMA
5-8
YES
5
Individual STP
100
Ω
±
30
Ω
EIA, TIA
10BASE-T
8-10
YES
IBM
Type 1
Individual STP
150
Ω
PCC FT 1
N/A
YES
1