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Chapter 6 Broadband
VMG3925-B10C/B30C User’s Guide
89
The following table describes the labels in this screen.
Table 11 Network Setting
>
Broadband > Cellular Backup
LABEL
DESCRIPTION
General
Cellular Backup
Select
Enable
to have the VMG use the cellular connection as your WAN or a backup when the
wired WAN connection fails.
Ping Check
Select
Enable
if you want the VMG to ping check the connection status of your WAN. You can
configure the frequency of the ping check and number of consecutive failures before triggering
cellular backup.
Check Cycle
Enter the frequency of the ping check in this field.
Consecutive Fail Enter how many consecutive failures are required before cellular backup is triggered.
Ping Default
Gateway
Select this to have the VMG ping the WAN interface’s default gateway IP address.
Ping Host
Select this to have the VMG ping the particular host name or IP address you typed in this field.
Cellular Connection Settings
Card
description
This field displays the manufacturer and model name of your cellular card if you inserted one in
the VMG. Otherwise, it displays
N/A
.
Username
Type the user name (of up to 64 ASCII printable characters) given to you by your service
provider.
Password
Type the password (of up to 64 ASCII printable characters) associated with the user name
above.
Authentication
The VMG supports
PAP
(Password Authentication Protocol) and
CHAP
(Challenge Handshake
Authentication Protocol).
CHAP
is more secure than
PAP
; however,
PAP
is readily available on
more platforms. Use the drop-down list box to select an authentication protocol for outgoing
calls. Options are:
AUTO
- Your VMG accepts either
CHAP
or
PAP
when requested by this remote node.
CHAP
- Your VMG accepts
CHAP
only.
PAP
- Your VMG accepts
PAP
only.
PIN
A PIN (Personal Identification Number) code is a key to a cellular card. Without the PIN code,
you cannot use the cellular card.
If your ISP enabled PIN code authentication, enter the 4-digit PIN code (0000 for example)
provided by your ISP. If you enter the PIN code incorrectly, the cellular card may be blocked by
your ISP and you cannot use the account to access the Internet.
If your ISP disabled PIN code authentication, leave this field blank.
Dial string
Enter the phone number (dial string) used to dial up a connection to your service provider’s base
station. Your ISP should provide the phone number.
For example, *99# is the dial string to establish a GPRS or cellular connection in Taiwan.
APN
Enter the APN (Access Point Name) provided by your service provider. Connections with
different APNs may provide different services (such as Internet access or MMS (Multi-Media
Messaging Service)) and charge method.
You can enter up to 32 ASCII printable characters. Spaces are allowed.
Connection
Select
Nailed UP
if you do not want the connection to time out.
Select
on Demand
if you do not want the connection up all the time and specify an idle time-
out in the
Max Idle Timeout
field.
Max Idle
Timeout
This value specifies the time in minutes that elapses before the VMG automatically disconnects
from the ISP.