Oki 8100e - Manual (Page 7)

OkiLAN 8100e Configuration 7
test, AdminManager, WEB and TELNET, use of these protocols is not
supported in the C5100.
Self-diagnostic test
With the printer power switched on, press the push-button located on
the network interface panel (at the rear of the printer) for more than
three seconds and release. The self-diagnostic test results and
configuration settings are printed.
On the first page of the Network Information that is printed out, under
the heading General Information the MAC Address is given. For
example:
MAC Address 00808784E3F1
From this information:
the Ethernet address is: 00:80:87:84:E3:F1