Digi TransPort WR31 User Manual page 239

Configure network interfaces
Use the following DNS servers if not negotiated
Primary DNS server
The IP address of the primary DNS server to use if a DNS server is not assigned as part of the PPP
negotiation and connection process. It is fairly common practice for the DNS server to be
assigned automatically by the ISP when making a connection.
Secondary DNS server
The IP address of the secondary DNS server to use if one is not automatically assigned by the
remote peer.
Attempt to assign the following IP configuration to remote devices
When checked, this check box reveals the following four configuration parameters which control
how the PPP instance assigns an IP address to a connecting remote peer. The primary and
secondary DNS server addresses will also be sent to the remote peer
Assign remote IP addresses from a.b.c.d to a.b.c.d
The IP addresses that define the pool of IP addresses to assign to remote peers during the IP
protocol configuration phase of the PPP negotiation process.
Primary DNS server
The IP address of the primary DNS server that the remote peer should use when making DNS
requests over the link.
Secondary DNS server
The IP address of the secondary DNS server that the remote peer should use when making DNS
requests, should the primary server be unavailable.
Allow the PPP interface to answer incoming calls
When enabled, causes the PPP instance to answer an incoming call.
Only allow calling numbers ending with n
When set to answer calls, this setting provides a filter for ISDN sub-addresses. This value is blank
by default but when the PPP instance is set to answer calls, only numbers having trailing digits
that match the sub-address value in this test will be answered. So for example, if this value is set
to 123, only calls from numbers with trailing digits that match this value will be answered; for
example, 01942 605123.
Enable NAT on this interface
Enables Network Address Translation to operate on this interface. This is the same as for other
PPP interfaces.
IP address/IP address and Port
Whether IP address translation only should be applied or whether port number translation
should also be applied to IP packets.
Digi TransPort WR Routers User Guide
Configure ISDN interfaces
239