Configuring network interfaces Configure PSTN interfaces
Digi TransPort® Routers User Guide
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Use a.b.c.d as the local IP address for this router
If it is essential that the PPP interface has a specific IP address, select this radio button and
the IP address entered into the text box.
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 enabled, 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 are also sent to the remote peer
Assign remote IP addresses from a.b.c.d to a.b.c.d
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, the value in this text box 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
When enabled, enables Network Address Translation to operate on this interface. This is the
same as for other PPP interfaces.
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