3Com 3C13701, Installation Manual

Page: 66 / 104

64 C
HAPTER
4: I
NSTALLING THE
R
OUTER
Figure 66 Connecting the Router to the Ethernet
Connecting the Router
to the WAN
The Router 5000 Family provides two fixed WAN ports, and gives you the option
to install further WAN ports as required. The fixed ports are the AUX port and the
serial port. The additional ports are provided by the SICs and MIMs supported by
the Router.
Connecting the AUX
Port to the Modem
The auxiliary (AUX) port is a serial port that is used for remote configuration or
dial-up backup. To connect the router to a remote device, a local modem must be
connected to a remote modem through PSTN. For the connection method, see
Chapter 5. For AUX port specifications, see Chapter 1.
If the console port fails, the AUX port can also serve as a console port.
To connect the AUX cable:
1 Turn off power to the router.
2 Plug the RJ-45 connector of the AUX cable into the AUX port of the router.
3 Connect the DB-25 or DB-9 adapter of the AUX cable to the serial port of the
analog modem, as shown below.
Figure 67 Connecting the AUX Port to the Analog Modem
Connecting the Serial
Port to a CSU/DSU
The serial port is usually used to connect the router to DSU/CSU.
Plugging or unplugging the connectors of the serial cable on line can damage the
router or the remote device.
10/100M Ethernet
interface
ETHERNET0 interface
Ethernet cable
LAN switch or hub
Modem
AUX cable
AUX port
Serial interface