User`s guide

Vigor2820 Series User’s Guide
146
Callback Function The callback function provides a callback service only for the
ISDN dial-in user (for s model only). The remote user will be
charged the connection fee by the telecom.
Check to enable Callback function-Enables the callback
function.
Specify the callback number-The option is for extra security.
Once enabled, the router will ONLY call back to the specified
Callback Number.
Check to enable callback budget control-By default, the
callback function has a time restriction. Once the callback
budget has been exhausted, the callback mechanism will be
disabled automatically.
Callback Budget (Unit: minutes)- Specify the time budget for
the dial-in user. The budget will be decreased automatically per
callback connection.
3
3
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9
9
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6
6
L
L
A
A
N
N
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L
L
A
A
N
N
Here you can manage LAN-to-LAN connections by maintaining a table of connection profiles.
You may set parameters including specified connection direction (dial-in or dial-out),
connection peer ID, connection type (VPN connection - including PPTP, IPSec Tunnel, and
L2TP by itself or over IPSec) and corresponding security methods, etc.
The router supports 32 VPN tunnels. The following figure shows the summary table.
Set to Factory Default
Click to clear all indexes.
Name
Indicate the name of the LAN-to-LAN profile. The
symbol ??? represents that the profile is empty.
Status
Indicate the status of individual profiles. The symbol
V and X represent the profile to be active and
inactive, respectively.
Click each index to edit each profile and you will get the following page. Each LAN-to-LAN
profile includes 4 subgroups. If the fields gray out, it means you may leave it untouched. The
following explanations will guide you to fill all the necessary fields.