Chapter 5 WAN Setup
P-662H/HW-D Series User’s Guide
100
The following table describes the labels in this screen.  
Table 28   WAN Dial Backup Modem Setup
LABEL DESCRIPTION
AT Command 
Strings 
Dial
  Type the AT Command string to make a call. Example: atdt 
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. 
Answer
  Type the AT Command string to answer a call. Example: ata 
Drop DTR When 
Hang Up  
Select this check box to have the ZyXEL Device 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 ZyXEL Device capture the CLID in the AT response 
string that comes from the WAN device. CLID is required for CLID authentication. 
Example: NMBR 
Called ID  Type the keyword preceding the dialed number. 
Speed
  Type the keyword preceding the connection speed. Example: CONNECT 
Call Control 
Dial Timeout  Type a number of seconds for the ZyXEL Device to try to set up an outgoing call 
before timing out (stopping). Example: 60 
Retry Count  Type a number of times for the ZyXEL Device to retry a busy or no-answer phone 
number before blacklisting the number. Example: 0 
Retry Interval  Type a number of seconds for the ZyXEL Device to wait before trying another call 
after a call has failed. This applies before a phone number is blacklisted. Example: 
10 
Drop Timeout  Type the number of seconds for the ZyXEL Device to wait before dropping the DTR 
signal if it does not receive a positive disconnect confirmation. Example: 20 
Call Back Delay  Type a number of seconds for the ZyXEL Device to wait between dropping a 
callback request call and dialing the corresponding callback call. Example: 15 
Back
  Click Back to return to the previous screen. 
Apply Click Apply to save the changes. 
Cancel Click Cancel to begin configuring this screen afresh.