Digi TransPort WR31 User Manual page 231

Configure network interfaces
Use the following local IP configuration
Local IP Address:
The IP address of the router's ISDN answering interface. Set this field to the desired local IP
address.
Attempt to assign the following IP configuration to remote devices
Set this parameter if the remote system needs a supplied address. The interface makes an
attempt to negotiate an IP address from the IP address pool. Generally, this parameter is
enabled for incoming connections. When enabled, displays the following parameters:
Assign remote IP addresses from a.b.c.d to a.b.c.d
The range of IP addresses supplied to incoming callers. This parameter may require alteration if
the default value 10.10.10.0 to 10.10.10.4 does not suit the remote network configuration.
Mask:
The IP netmask for the Remote network. Use this setting to create a dynamic route to the remote
network whenever the ISDN interface is active.
Primary DNS server:
The answering ISDN interface would normally supply its own PPP IP address to the peer for DNS
requests. This parameter allows you to specify an alternative DNS IP address.
Secondary DNS server:
A secondary DNS server IP address to the peer for DNS requests, if required.
Enable NAT on this interface
Enables or disables IP Network Address Translation (NAT) on the answering ISDN interface.When
enabled, displays the following options:
IP Address
Enable standard Network Address Translation (NAT).
IP address and Port
Enable Network Address and Port Translation (NAPT).
Digi TransPort WR Routers User Guide
Configure ISDN interfaces
231