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ZyWALL 2 Series User’s Guide
6-22 WAN Screens
Table 6-9 Dial Backup Setup
LABEL DESCRIPTION
Configure Budget Select this check box to have the dial backup connection on during the time that
you select.
Allocated Budget Type the amount of time (in minutes) that the dial backup connection can be used
during the time configured in the Period field. Set an amount that is less than the
time period configured in the Period field.
Period Type the time period (in hours) for how often the budget should be reset. For
example, to allow calls to this remote node for a maximum of 10 minutes every
hour, set the Allocated Budget to 10 (minutes) and the Period to 1 (hour).
Idle Timeout Type the number of seconds of idle time (when there is no traffic from the
ZyWALL to the remote node) for the ZyWALL to wait before it automatically
disconnects the dial backup connection. This option applies only when the
ZyWALL initiates the call. The dial backup connection never times out if you set
this field to "0" (it is the same as selecting Always On).
Apply
Click Apply to save your changes back to the ZyWALL.
Reset
Click Reset to begin configuring this screen afresh.
6.11 Advanced Modem Setup
6.11.1 AT Command Strings
For regular telephone lines, the default “Dial” string tells the modem that the line uses tone dialing. “ATDT”
is the command for a switch that requires tone dialing. If your switch requires pulse dialing, change the string
to “ATDP”.
For ISDN lines, there are many more protocols and operational modes. Please consult the documentation of
your TA. You may need additional commands in both “Dial” and “Init” strings.
6.11.2 DTR Signal
The majority of WAN devices default to hanging up the current call when the DTR (Data Terminal Ready)
signal is dropped by the DTE. When the “Drop DTR When Hang Up” check box is selected, the ZyWALL
uses this hardware signal to force the WAN device to hang up, in addition to issuing the drop command
“ATH”.