ZyXEL Communications ZyWALL 300 User Manual

Chapter 44 Service Control

ZyWALL USG 300 User’s Guide

a management

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.

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.

The response strings tell the ZyWALL the tags, or labels, immediately preceding the various 
call parameters sent from the serial modem. The response strings have not been standardized; 
please consult the documentation of your serial modem to find the correct tags.

Click System > Dial-in Mgmt to display the following screen. Configure this screen for dial-
in management connections. 

Figure 455   System > Dial-in Mgmt  

The following table describes the labels in this screen.

Table 213   System > Dial-in Mgmt 

Enable 

Select this check box to turn on dial-in management.

Description

Enter some information about this connection.

Mute

Select this check box to stop the external serial modem from making audible 
sounds during a dial-in management session.

Answer Rings

Set how many times the ZyWALL lets the incoming dial-in management session 
ring before processing it.