Allied Telesis AT-MR912TX - Manual (Page 35)

AT-MR912TX Installation Manual
15
For the foregoing reasons, it is absolutely vital that all cabling used with
100Base-TX connections is Category 5. Using any other category, or a poor
quality cable, for a 100Base-TX connection will potentially have high error
rates or will not transfer data at all.
The six common modular cable specifications and their applicability to
100Base-TX networks are shown in Table 7.
Table 7:Twisted Pair Cable
Cable
Cat
Cable
Description
AC
Character
Specification Twist/Foot
100Base-TX
OK?
1 Unshielded
Untwisted
N/A CCITT None NO!
2 Individual
UTP
100
Ω
± 30 Ω
RS232 1Base5
AT&T PDS
None NO!
3 Typical
Individual
UTP
100
Ω
±
15
Ω
T1, AT&T ISDN
10Base-T
IBM Type 3
3-5 NO!
4 Enhanced
Individual
UTP
100
Ω
±
30
Ω
EIA, TIA
10Base-T
NEMA
5-8 NO!
5 Individual
UTP
100
Ω
±
30
Ω
EIA, TIA
10Base-T
8-10 YES
6 Individual
STP
150
Ω
±
30
Ω
EIA, TIA
10Base-T
8-10 YES