ZyXEL Communications ZyWALL 2 Series User Manual

ZyWALL 2 Series User’s Guide 

WAN Screens 

6-25 

Drop  Type the AT Command string to drop a call. "~" represents a one 

second wait, for example, "~~~+++~~ath" can be used if your modem 
has a slow response time.  

~~+++~~ath 

Answer  Type the AT Command string to answer a call. 

ata 

Drop DTR When 

Hang Up 

Select this check box to have the ZyWALL drop the DTR (Data 
Terminal Ready) signal after the "AT Command String: Drop" is sent 
out. 

 

AT Response Strings 

CLID  Type the keyword that precedes the CLID (Calling Line Identification) 

in the AT response string. This lets the ZyWALL capture the CLID in 
the AT response string that comes from the WAN device. CLID is 
required for CLID authentication. 

NMBR 

Called ID  Type the keyword preceding the dialed number. 

 

Speed  Type the keyword preceding the connection speed. 

CONNECT 

Call Control 

Dial Timeout 

(sec) 

Type a number of seconds for the ZyWALL to try to set up an 
outgoing call before timing out (stopping).  

60 

Retry Count  Type a number of times for the ZyWALL to retry a busy or no-answer 

phone number before blacklisting the number. 

0 

Retry Interval 

(sec) 

Type a number of seconds for the ZyWALL to wait before trying 
another call after a call has failed. This applies before a phone 
number is blacklisted.  

10 

Drop Timeout 

(sec) 

Type the number of seconds for the ZyWALL to wait before dropping 
the DTR signal if it does not receive a positive disconnect 
confirmation. 

20 

Call Back Delay 

(sec) 

Type a number of seconds for the ZyWALL to wait between dropping 
a callback request call and dialing the corresponding callback call. 

15 

Apply 

Click Apply to save your changes back to the ZyWALL. 

Cancel 

Click Cancel to exit this screen without saving.