Netcom NB9 - Manual (Page 57)

NB9/NB9W ADSL+ VoIP Router 7
YML790 Rev8
Advanced > Routing > Default Gateway
Default Gateway is checked by default and ensures that the NB9/NB9W will accept the first received IP
address assigned to it by the DHCP server to which it connects. This will generally be the ISP’s server. You
would only uncheck this if the NB9/NB9W was being used in Static Routing mode (see below).