H3C Technologies H3C MSR 30 - Manual (Page 42)

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WARNING!
Laser danger: Invisible laser radiation may be emitted from the optical ports which are connected with
lasers. To protect your eyes against radiation harm, never stare into an open optical port.
Follow these steps to connect a fiber to a 10/100/1000 Mbps optical interface:
Step1 Use two fibers to connect the Rx and Tx ends of the interface to another device: Rx to Tx, and Tx to Rx.
Step2 View the LINK LED of the 10/100/1000 Mbps Ethernet interface: ON means a link is present. OFF
means no Rx link is present; check the line for the cause.
Connecting AUX to a Modem
AUX port
AUX is an RS232 asynchronous serial interface, which can back up a WAN interface and provide dial
connection. In case of console failure, AUX can function as a console interface.
NOTE:
The console port and AUX port on an MSR 30-1X share the same physical port.
AUX cable
AUX cable is an eight-wire shielded cable. At one end of the cable is an RJ-45 connector for connecting
the console port on the router. At the other end are DB-9 (male) connector and DB-25 (male) connector.
You can plug either of them into the serial port on a modem as needed.
Figure 32 AUX cable
Connecting the AUX cable
Follow these steps to connect the AUX cable.
Step1 Plug the RJ-45 connector of the cable into the AUX port on the main board.
Step2 Plug the DB-25 or DB-9 connector into the serial port on the analog modem.
When using the AUX interface for remote configuration or dial backup, you need to connect the local
modem to the remote modem through PSTN and then to the remote device. For the configuration
procedures, refer to MSR Series Routers Configuration Guide.