Code:
>help
The followings are available commands:
config Configure system
debug Debug system
exit Exit command line interface
help Help information
reboot Reboot system
show Show system information
>config
command error!
Commands after "config" are:
account Set account
acl Config access control list
bridge Set bridging ageing time and STP
dhcp Config DHCP
dmz Config DMZ
dns Config DNS server
domainblock Domain blocking
igmpproxy Config igmp_proxy
ipportfilter Ip port filtering
lan Config LAN interface
macfilter Set MAC filtering
portforward Set port forwarding
remoteaccess Config remote access
reset Restore to default setting
rip Config RIP
route Add/Delete routes
save Save configuration
tr069 Config TR069
upnp Config UPnP
urlblock Set URL blocking
The telnet looks very basic. Not sure if there are any hidden commands.