To change the DHCP lease period for a Zyxel P-660R-D1 router, telnet into the router and at the command line type
“ip dhcp enif0 server lease 120”
This will set the DHCP lease tim to 120 seconds. If you wanted to have the lease time set to 1 hour you would substitute the 120 for 3600
Please note the “enif0” is made up like this echo – novembe – india – foxtrot – zero