Aux Cable - 3Com Switch 7700 Installation Manual

I N S T A L L I N G H A R D W A R E
Plug the DB-9 or DB-25 female plug of the console cable to the serial port of the PC or the terminal where
1.
the switch is to be configured.
Connect the RJ-45 connector of the console cable to the console port of the switch.
2.

5.6.2. AUX cable

An AUX cable is used for the Switch 7700 remote dial-up configuration using a modem.
The AUX cable is an 8-core shielded cable. One end of the cable is an RS-232 RJ-45 connector, which is used to plug
into the switch at the console port. The other end has both a DB-9-pin connector and a DB-25-pin for connection
to a 9- or 25-hole serial port on the virtual modem. Figure 17 illustrates the AUX cable.
Figure 17 The AUX cable
Enlarged A side
Pos .1
A
Pos .25
Table 26 AUX cable pin-outs
RJ-45
1
2
3
4
5
6
7
8
To connect the AUX cable:
1. Plug the RJ-45 end of the AUX cable into the switch console port.
2. Connect the DB-25 (or DB-9) end of the AUX cable to the serial port of the virtual Modem.
32
DB25 Male
8P8C PLUG
Label
DB9 Male
Signal Direction
RTS --->
DTR --->
TXD --->
CD <---
GND ---
RXD <---
DSR <---
CTS <---
Enlarged B side
B
Pos .1 Pos .8
Enlarged C side
Pos .9
C
Pos .1
DB-25
4
20
2
8
7
3
6
5
DB-9
7
4
3
1
5
2
6
8