TW-H6W1IR ISDN Remote Router
50 Configuration and
Management
3. Assuming a matching Remote Network Profile is found, the router may
configure the IP address of the remote station (as defined in the Remote
Network Profile).
4. Configures the specified ISDN Interface (a virtual circuit) using the
configuration parameters defined in the Interface Configuration menu and
the Remote Network Profile to handle the connection.
5. Establishes the connection on whichever B-channel (physical port) is open
by mapping the dial-in interface to that port.
Dial-Out Network Connections
Dial-out network connections are much different than dial-in
connections.
When a packet on the LAN reaches the router, the TW-H6W1IR will:
1. Check its routing table to try to identify where this packet should go. It
looks for two variables in the routing table, Gateway address and Interface.
There are four possible results:
I. In the case where the destination resides in the same IP network on the
LAN, the routing engine never acts on the packet and it is sent directly
to the destination through the built-in hub.
II. In the case where the destination resides on a different IP network on
the LAN (which can happen when Multiple Home Configuration is set
up), the router will send out an ARP request to obtain the MAC address
of the destination computer (or router) and deliver the packet. Note that
defining Static ARPs can speed up delivery since the router won’t need
to send out an ARP request.
III. In the case where the router finds a match in the routing table (which
includes IP Static Routes), it uses the Gateway address and Interface
numbers to identify the correct Remote Network Profile to use to dial
out. From the Remote Network Profile, the router gets the telephone
number and other information and dials out, establishes a connection
and delivers the packet. If you have a connection to the Internet, it is
very important that you define the default next hop router in the IP
Static Routes submenu of the console program as your ISP (see the IP
Static Routes section of this manual for more detailed configuration
