Allied Telesis AT-TS90TR - Manual (Page 28)

AT-TS90-TR 10Base-T Switch With 100Base-T Access
17
100BASE-TX Cable. 100BASE-TX connections must be made with
category 5 cables only. Using any other category or a poor quality cable for
a 100BASE-TX connection will potentially have high error rates or will
not move data at all.
The five common modular cable specifications and their applicability to
10BASE-T and 100BASE-TX networks are shown in Table 2.
Table 2: Twisted Pair Cable
Cable
Cat
Cable
Description
AC
Character
Specification Twist/Foot
10BASE-T
OK?
100BASE-TX
OK?
1 Unshielded
Untwisted
N/A CCITT None NO! NO!
2 Individual
UTP
100
Ω ±
30
Ω
RS232
1BASE5 AT&T
PDS
None NO! NO!
3 Typical
Individual
UTP
100
Ω ±
15
Ω
T1, AT&T ISDN
10BASE-T
IBM Type 3
3-5 YES NO!
4 Enhanced
Individual
UTP
100
Ω ±
30
Ω
EIA, TIA
10BASE-T
NEMA
5-8 YES NO!
5 Individual
UTP
100
Ω ±
30
Ω
EIA, TIA
10BASE-T
8-10 YES YES