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Chapter 5 Device Network Settings
Vantage CNM User’s Guide
92
5.3.5 Advanced Modem Setup (ZyNOS ZyWALL)
5.3.5.1 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.
5.3.5.1.1 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 device uses this hardware signal to force the WAN device to hang up, in
addition to issuing the drop command ATH.
Primary/Secondary
Phone Number
Type the first (primary) phone number from the ISP for this remote node. If
the Primary Phone number is busy or does not answer, the device dials the
Secondary Phone number if available. Some areas require dialing the pound
sign # before the phone number for local calls. Include a # symbol at the
beginning of the phone numbers as required.
AT Command Initial
String
Type the AT command string to initialize the WAN device. Consult the manual
of your WAN device connected to your Dial Backup port for specific AT
commands.
Advanced Modem
Setup
Click Advanced to display the WAN:Advanced Modem Setup screen and
edit the details of your dial backup setup.
TCP/IP Options Click Edit to display the WAN:Dial Backup TCP/IP Options screen.
Budget Select Always On to have the dial backup connection on all of the time.
Select Configure Budget 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
device to the remote node) for the device to wait before it automatically
disconnects the dial backup connection. This option applies only when the
device 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 device.
Reset Click Reset to begin configuring this screen afresh.
Table 26 Device Operation > Device Configuration > Network > WAN > Dial Backup (ZyNOS
ZyWALL) (continued)
LABEL DESCRIPTION