Installation manual

AT-2560FX 100 and AT-2560TX 10/100 PCI
6
There are various grades of voice-quality and data-quality cables
available. These can appear to be similar externally, and their
DC characteristics are also similar, although their AC
characteristics, and therefore high-speed data transmission
characteristics, are radically different. The six common modular
cable specifications and their applicability to 10BASE-T or
100BASE-TX network use are shown in Table 2.To reliably
operate your network at 100 Mbps, you must use TPE Category
5 Data Grade wire with this adapter. While Category 3 or 4 wire
may initially seem to work, it will soon cause data loss.
Table 2: Usable and Unusable Twisted-Pair Cable
Cable
Level
Cable
Description
AC
Char.
Specifi-
cation
Twist/
Foot
OK TO
USE?
1
Unshielded
untwisted
N/A CCITT none NO!
2
Unshielded
Indv.Twisted Pairs
100
W
± 30 W
RS232 1BASE5
AT&T PDS
none NO!
3
Typ. Unshielded
Indv. Twisted Pairs
100
W
± 15 W
TI, AT&T ISDN
10BASE-T
IBM Type 3
3-5 10BASE-T
ONLY
4
Unshielded
Enhanced Indv.
Twisted Pairs
100
W
± 30 W
EIA, TIA
10BASE-T
NEMA
5-8 10BASE-T
ONLY
5
Unshielded
Indv. Twisted Pairs
100
W
± 30 W
EIA, TIA
10BASE-T
8-10 BOTH
10BASE-T
AND
100BASE-
TX
IBM
Type 1
Shielded
Indv. Twisted Pairs
150
W PCC FT 1 N/A NO!