Table 7: twisted pair cable, Unshielded untwisted, Ccitt – Allied Telesis AT-MR912TX User Manual
Page 35: None, Individual utp, 100w ±30w, Rs232 1base5 at&t pds, Typical individual utp, 100w ±15w, T1, at&t isdn 10base-t ibm type 3
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