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Troubleshooting
24
Appendix A - Troubleshooting
This appendix provides useful information to help you to solve any problem you might have with
your AXIS 2490. Fault symptoms, possible causes and remedial actions are provided in a quick
reference table.
PINGing Your IP Address
By sending a packet to the specified address and waiting for a reply, the PING utility can
determine whether a specific IP address is accessible. It also provides a particularly useful
method for confirming addressing conflicts with your AXIS 2490 on the network.
Having disconnected your AXIS 2490, follow the instructions below in association with
Symptoms, Possible Causes and Remedial Actions, on page 25, and run the PING utility to
troubleshoot TCP/IP problems on your network:
1. Start a DOS window.
2. Type
ping x.x.x.x
3. The subsequent replies will provide an explanation as to the cause of the problem.
Replies can be interpreted as defined in the table below:
PING Reply
bytes = 32 time = 2 ms.....
destination host unreachable
request timed out
How to test your setup
Connect a serial port on the 2490 to a serial port on the PC using a null modem cable.
Start a terminal program on the PC that accesses the serial port, e.g. Hyper Terminal in
Windows or minicom or cua in Linux.
Start a telnet session to the Serial Server IP address and the corresponding TCP port for the
chosen serial port (default 4000, 4001, 4002).
In Windows, select Run... from the Start Menu and type: telnet ipaddress portnr,
for example: telnet 10.13.7.12 4000.
Everything you type should appear in the terminal program when you press Enter, and
everything you type in the terminal program should appear in the telnet window.
, where
x.x.x.x
Interpretation and recommendation
.
The IP address is already in use. You must obtain a new IP address.
The AXIS 2490 is not accessible within your subnet.
You must obtain a new IP address.
This IP address is not used by anyone and is available for use with your
AXIS 2490.
is the IP address of the AXIS 2490.
AXIS 2490 User's Manual
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