Oki C9600 Service Manual page 223

Failed to obtain IP address with DHCP setting/IP address that was not intended was
obtained
Phenomenon:
With C9600 running with the DHCP enabled, an attempt to obtain IP address failed. Or the printer
runs with an IP address that is different from the IP address that has been assigned by the DHCP
server.
Possible cause
DHCP server's IP address pool has run of
addresses, and cannot assign an IP
address.
IP address is assigned by the DHCP server
function of the access point.
Cannot communicate with DHCP server.
In case of Ad hoc Mode, normally DHCP does not assign IP addresses. To use in Ad hoc
Mode, set a fixed IP address manually in the C9600 and the wireless computer.
Failed to connect in Open Mode.
Phenomenon:
Cannot make wireless connection in Open Mode though there is no electric wave problem.
Possible cause
C9600's SSID setting is incorrect.
The settings of the access point/wireless
computer are incorrect.
Wireless standard of the access point/
wireless computer does not match the
C9600.
C9600's network setting is incorrect.
42930511TH Rev. 2
Check the DHCP server's IP address assignment state and set the DHCP
server's IP address pool appropriately.
Change the IP address setting of the C9600 to manual setting, and set
an appropriate IP address.
Check the access point's setting and set the DHCP server function
properly.
Check the network route of the access point and DHCP server, and
connect so that C9600 can communicate with DHCP server via access
point.
Check the settings of the access point/wireless computer and set the
correct SSID in the C9600.
Note that SSID is case sensitive.
Check the settings of the access point/wireless computer and set them
correctly.
An example of the setting items you should check:
• SSID
• Authentication Method (should be set to Open Mode)
• Encryption Method ( setting should be 'No encryption')
Confirm that the access point/wireless computer are compliant with
IEEE802.11b or 802.11g. C9600 is compliant only with IEEE802.11b/g.
Make sure that the access point/wireless computer's IEEE802.11b or
802.11g function has been set to Enable.
Change the setting so that the wireless standard of the access point/
wireless computer and the wireless standard that the C9600 uses match.
For example, if the C9600's [Communication Mode] has been set to
[802.11b] and the access point/wireless computer have been set to
[802.11g Only], they cannot be connected.
Set the correct IP address, the subnet mask and the default gateway in
the C9600.
* Please note that the network setting of the wired LAN interface and the
network setting of the wireless LAN card of the C9600 must be set
separately.
Oki Data CONFIDENTIAL
What to do
What to do
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