Installation manual

AT-1500 Plug and Play
22
10BASE-T UTP/RJ45 Cabling
The AT-1500T Plug and Play adapter card is for use with
10BASE-T segments, using an 8-wire (4-pair) RJ45 jack for the
network cable, shown in Figure 2.
Figure 2: AT-1500T Plug and
Play UTP Port and RJ45
Connector
Important 10BASE-T Cable Considerations. There are various
grades of voice-quality and data-quality cables available. The five
common modular cable specifications and their applicability to
10BASE-T network use are shown in Table 6.
Table 6: Usable and Unusable 10BASE-T Cable
Cable
Level
Cable
Description
AC
Char.
Specifi-
cation
Twist/
Foot
10BASE-T
OK?
1
Unshielded
untwisted
N/A CCITT none NO!
2
Unshielded
Indv.Twisted Pairs
100 Ω
± 30 Ω
RS232 1BASE5
AT&T PDS
none NO!
3
Typ. Unshielded
Indv. Twisted Pairs
100 Ω
± 15 Ω
TI, AT&T ISDN
10BASE-T
IBM Type 3
3-5 YES