Utp Reference; Utp Wiring Specifications; Table 5: Usable And Unusable Twisted Pair Cable - Allied Telesis CentreCOM AT-3606F Installation Manual

Appendix A

UTP Reference

UTP Wiring Specifications

10BASE-T requires UTP wiring capable of supporting 10 Megabit data rates.
Use Level 3 or better UTP wiring throughout the 10BASE-T wiring system.
The wire should be 22 to 26 AWG, 100
Typically, if a cable is flat, the pairs are untwisted and will cause problems. A
cable more or less round in section is likely to be twisted.
The specifications of 6 common modular cables and their applicability to
10BASE-T network use are shown in Table 5. The maximum length for
10BASE-T UTP segments is 100 meters (328 ft.).

Table 5: Usable and Unusable Twisted Pair Cable

Cable
Cable Description
Level
1 Unshielded untwisted
2 Individual UTP
3 Typical Individual UTP
4 Enhanced Individual UTP
5 Individual STP
IBM Individual STP
Type 1
impedance with 3 to 8 twists per foot.
AC Character Specification
N/A CCITT
100 30 RS232 1BASE5
AT&T PDS
100 15 TI, AT&T ISDN
10BASE-T
IBM Type 3
100 30 EIA, TIA
10BASE-T
NEMA
100 30 EIA, TIA
10BASE-T
150 PCC FT 1
Twist/ 10BASE-T
Foot OK?
N/A NO!
N/A NO!
3-5 YES
5-8 YES
8-10 YES
N/A NO!
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