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Installation Manual
5. Troubleshooting
50
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TROUBLESHOOTING
Troubleshooting of Configuration System
After the router is powered on and if the system is normal, the start information is displayed on
the configuration terminal. If the configuration system fails, there may be no display or messy
code on the configuration terminal.
Troubleshooting about no Display on Terminal
If there is no display information on the configuration terminal after being powered on, check
according to the following steps:
Step 1:
Check whether the power system of the router works normally
Step 2:
Check whether the indicator on the front panel of the router works normally.
Step 3:
Check whether the configuration cable is connected to Console port on the
front panel of the router.
If no problem is found in the above checks, there may be the following reasons:
1.
The serial port connected to the configuration cable is wrong (the actual selected serial port
is not consistent with the set serial port of the terminal).
2.
The setting of the configuration terminal parameters is wrong (the parameter requirement:
set the baud rate as 9600, data bit as 8, parity check as none, stop bit as 1, traffic control as
none, and select the terminal emulation as VT100). For details, refer to
4.1.2 Set PC
HyperTerminal Parameters
.
3.
There is something wrong with the configuration cable and you can try to change the
configuration cable.
Troubleshooting about Messy Code on Terminal
If messy code is displayed on the configuration terminal, maybe the setting of the configuration
terminal parameters is wrong (set the baud rate as 9600, data bit as 8, parity check as none, stop
bit as 1, traffic control as none, and select the terminal emulation as VT100), and please check
correspondingly. For details, refer to
4.1.2 Set PC HyperTerminal Parameters
Troubleshooting about Fan
There is a fan status indicator on the panel of the QSR-3920 series router, which indicates the
work status of the fan. The meaning of the indicator is shown in the following table.
Table 5-1 Meanings of fan indicator on the panel of the fan module of QSR-3920
Indicator Name
Indicator Color
Status
FAN
Green
on: indicates that the fan
works normally.