Fault 3: The Serial Port Console Has No Output; Fault 4: The Serial Port Console Outputs Illegible Characters; Fault 5: The Newly-Inserted Service Card Module Fails To Be Powered On; Fault 6: The Link Cannot Be Set Up Between Fiber Interfaces - QTech QSW-6300 Series Hardware Installation And Reference Manual

QSW-6300 Series Switches Hardware Installation and Reference Guide
Troubleshooting
First unplug the power cord of the power module. Check if the cables of the cabinet have been
correctly connected. Check whether the cabinet power sockets are loosely connected to power
modules. Check whether the power modules are installed correctly. If necessary, pull out the
power modules and check whether the connectors of the power system get loose.

6.2.3. Fault 3: The serial port console has no output.

[Fault Description]
After the system is started, the serial console does not display any information.
[Troubleshooting]
Check whether serial port cables are connected correctly, whether serial port cables are
disconnected, and whether the connected serial port is identical with that configured on the
hyper terminal. Check whether the configuration of the serial port on the hyper terminal. If not,
modify the serial port configuration parameters. If there is still no serial port printed information,
please contact QTECH Customer Service Department for technical support.

6.2.4. Fault 4: The serial port console outputs illegible characters.

[Fault Description]
The serial port console outputs illegible characters, which are unable to identity.
[Troubleshooting]
Such a problem is related to the settings of the serial port. Check if the settings of such
parameters as the baud rate match those in QSW-6300 Series Switch RGOS Configuration
Guide.

6.2.5. Fault 5: The newly-inserted service card module fails to be powered on.

[Fault Description]
The system is running, yet all indicators on the panel of the newly-inserted expansion module
are OFF, and the port is faulty.
[Troubleshooting]
Check whether the module is inserted correctly. If the newly-inserted module still cannot be
powered on even though the checking is ok, please contact QTECH Customer Service
Department for technical support.

6.2.6. Fault 6: The link cannot be set up between fiber interfaces.

[Fault Description]
The system runs normally. After the fiber interface is inserted into the optical module and the
optical fiber is properly connected, the link cannot be set up.
[Troubleshooting]

Check whether the receiving and sending ends are wrongly connected. The sending
end of the fiber interface needs to be connected to the receiving end of the other fiber
interface. You can check by changing the sequence in which the two optical fibers are
connected on the optical module.

Check whether the optical module wavelengths of the two sides are consistent. For
example, an optical module of 1310 nm wavelength cannot be connected to an optical
module of 1550 nm wavelength.

Check whether the distance between the two sides exceeds the length indicated on the
optical module.
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