3Com 5000 Series Installation Manual page 38

3Com Router 5000 Family
Installation Guide
I. Introduction to the AUX port
As an RS232-compliant asynchronous serial interface, the AUX port can be used as
the backup of other WAN interface in the dial-up mode. In the event that the console
port fails, the AUX port can serve as a console port. For the attributes of the AUX port,
please refer to Table 4-5.
Table 4-5 Attributes of the AUX port
Attribute
Connector
Interface standard
Baud rate
Function
Protocol
II. AUX cable
AUX cable is an 8-core shielded cable. One end of the cable is an RJ45 connector,
which can be plugged into the AUX port of the device. The other end is furnished at the
same time with a DB9 (male) connector and a DB25 (male) connector. The user can
choose either of them to plug into the serial port of Modem as needed.
Figure 4-11 AUX cable assembly
III. Connection of the AUX cable
Follow these steps to connect the AUX cable:
Step 1: Plug the RJ45 connector of the AUX cable into the AUX port of the router.
Step 2: Connect the DB25 or DB9 connector of the AUX cable to the serial interface of
the analog Modem.
RJ45
RS232
300 bps to 115200 bps
Modem dial-up
Backup
Operating as the console port when the CON fails
PPP
SLIP
MP
3Com Corporation
4-11
Chapter 4 Installation of the Router
Description