Data Cabling Techniques
42
The six common modular cable specifications and their applicability to
10BASE-T network use are shown in Table 8.
Table 8: UTP Wiring Specifications
10BASE-T Point-
to-Point Cabling
The standard connection when using a hub is from a Data
Communications Equipment (DCE) device, such as a repeater, to a Data
Terminal Equipment (DTE) device, such as a workstation NIC. This
configuration uses a straight-through cable. See Figure 18.
Cable
Level
Cable Description
AC Character
Specification
Twist/
Foot
10BASE-T
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
YES
4
Enhanced
Individual STP
100
Ω ±
30
Ω
EIA, TIA
10BASE-T
NEMA
5-8
YES
5
Individual STP
100
Ω ±
30
Ω
EIA, TIA
10BASE-T
8-10
YES
IBM
Type 1
Individual STP
150
Ω
PCC FT 1
N/A
NO!
Figure 18: 10BASE-T UTP
Cabling
Hub-to-MAU
(Straight-Through)
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
TD +
TD -
RD +
Not Used
TD +
TD -
RD +
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
RD -
RD -
RJ45 PIN
RJ45 PIN
Per IEEE 802.3 specifications
