3Com 3018 (3C13618) manual Ethernet Cable, Describes the AUX cable pinouts AUX Cable Pinouts

52CHAPTER A: OPTIONAL CABLE SPECIFICATIONS

Figure 28 illustrates the AUX cable.

Figure 28 AUX Cable Assembly

Enlarged A side	DB25 Male	8P8C Plug
		Label

Enlarged B side

DB9Male

Enlarged C side

Table 26 describes the AUX cable pinouts.

Table 26 AUX Cable Pinouts

RJ-45	Signal Direction	DB-25	DB-9	Signal
1	—>	4	7	RTS
2	—>	20	4	DTR
3	—>	2	3	TXD
4	<—	8	1	DCD
5	-	7	5	GND
6	<—	3	2	RXD
7	<—	6	6	DSR
8	<—	5	8	CTS

Ethernet Cable	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