Advanced Modem Setup - Zywall; At Command Strings - ZyXEL Communications Vantage CNM User Manual

Vantage CNM User's Guide

8.6.3 Advanced Modem Setup - ZyWALL

8.6.3.1 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.
8.6.3.1.1 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 ZyXEL device uses this hardware signal to force the WAN device to hang
up, in addition to issuing the drop command ATH.
8.6.3.1.2 Response Strings
The response strings tell the ZyXEL device the tags, or labels, immediately preceding the
various call parameters sent from the WAN device. The response strings have not been
standardized; please consult the documentation of your WAN device to find the correct tags.
Click the Advanced button in the Advanced Modem Setup in the Dial Backup screen to
display the Dial Backup Advanced screen shown next.
Note: Consult the manual of your WAN device connected to your dial backup port for
specific AT commands.
127 Chapter 8 Configuration > WAN