Ethernet Cable - 3Com Router 3012 Installation Manual

52 C A: O
HAPTER PTIONAL

Ethernet Cable

C S
ABLE PECIFICATIONS
Figure 28 illustrates the AUX cable.
Figure 28 AUX Cable Assembly
Enlarged A side
Table 26 describes the AUX cable pinouts.
AUX Cable Pinouts
Table 26
RJ-45 Signal Direction DB-25
1
2
3
4
5
6
7
8
The Ethernet cable uses an RJ-45 connector and category 5 twisted pair cable.
The Router 3000 series routers provide a fixed 10/100BASE-TX fast Ethernet port
that uses category-5 twisted pair cable, as shown in Figure 29
Figure 29 Ethernet Cable Assembly
The Ethernet cables are classified as straight-through network cable and crossover
network cable. They have the following features:
Straight-through network cable — The sequences of the wires crimped at the
■
RJ-45 connectors of the two ends are the same. The cable is used in the
connection between a terminal device, such as a PC or a router, and the Hub or
DB25 Male
Label
—> 4
—> 20
—> 2
<— 8
- 7
<— 3
<— 6
<— 5
8P8C Plug
Enlarged B side
DB9Male
Enlarged C side
DB-9 Signal
7 RTS
4 DTR
3 TXD
1 DCD
5 GND
2 RXD
6 DSR
8 CTS