ISDN Router Manual V.1.1
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by reducing the size of IP header for speeding up transmission performance. The remote site
must also support the VJ compression, otherwise the router won’t compress the IP header if the
remote site did not support the VJ compression.
It is suggested to turn on VJ compression.
config interface isdn ppp ipcp none
Turn off the VJ compression function.
5.4.1 Configure Dial-In and Call Back Function
config interface isdn ip pool <initial_ip_addr>
Configure the IP address assignment of the PPP connection.
This command is used for the remote dial-in function. The router can accept the remote user to
dial in with PPP connection and assign the IP address for the remote site if the remote site did not
setup its own IP address. By the remote dial-in function the remote user can access the LAN
resource just like it is connected the router locally. The router will check both the username and
password for valid access.
config interface isdn ppp add user <username> password <password> maxchan {1,2} callback
{yes,no} phone <phone#1> <phone#2>
Configure the user account for PPP or ML-PPP connection.
The router allows you to store multiple user accounts for both dialing in and out purpose. For
example, you can store different usernames and passwords for corresponding ISP when dialing
out. Also if the router received an incoming call for remote dial in, it will check the valid
username and password based on the stored
User Account Table
. The router will compare if the
dial-in username and password was defined in the
User Account Table
. If it is a valid account,
the router will accept the call and connect, after that the remote site can access the LAN resource
through the router. If the user account is invalid, the router will disconnect immediately.
The
maxchan
specifies to use 1-B channel for PPP connection or 2-B channel for ML-PPP
connection. For 1-B channel (64k, PPP) connection you need to setup
phone#1
, the router will
make an outgoing connection based on
phone#1
. For 2-B channel (128K, ML-PPP) connection