Oki B4300 User Manual page 41

If there is no reply, there is a problem with the configuration of the IP
address (the IP address has been already set manually or DHCP/RARP
server may run), or with the network. Reset the network interface card
settings to default and try to set temporary IP address. If you still have the
problem after resetting the network interface card, consult the network
manager.
4. Login to the network card using TELNET.
Example: for IP address 192.168.20.127
$ telnet 192.168.20.127
Trying 192.168.20.127
Connected to 192.168.20.127
Escape character is '^]'.
EthernetBoard OkiLAN PRINTER".
login: root
'root' user needs password to login.
password:
User 'root' logged in.
No. Message Value (level.1)
------------------------------------
1:Setup TCP/IP
2:Setup SNMP
3:Setup NetWare
4:Setup EtherTalk
5:Setup NetBEUI
6:Setup printer port
7:Display Status
8:Setup printer trap
9:Setup SMTP (E-Mail)
97:Reset to factory set
98:Quit setup
Configuration 39