ZyXEL Communications ZyWALL 2 Series User Manual

ZyWALL 2 Series User’s Guide 

6-22  

WAN Screens 

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. 

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.  

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”.