Westermo TDW-33 - Manual (Page 39)

6618-3202 39
*WCB – Secure access and Callback
Supported by: TDW-33 TD-36 TD-36 485 TR-36 TR-36B
Description
The secure callback functionality makes the established link more secure. After an incom-
ing call the modem will make a callback to either a preconfigured number or to the
incoming number. The callback can be protected by a password. The unit can also be con-
figured for a secure access without callback.
If the password is enabled, the calling part will be prompted for the password directly
after connection. When the password is entered correctly, the modem will disconnect
the current link and make a callback after a preset number of seconds WCBTIME.
If the unit is configured with password security, it will allow data only after the password
is correctly entered. After 3 retries of entering wrong password or after 60 seconds, the
link will be disconnected and the callback/secure access aborted.
Numbers and password used by the function is stored in the *wcbtab table
See also AT*WCBTAB.
Syntax:
AT*WCB = <n>
AT*WCB=?
AT*WCB?
Parameters:
<n>
0: Callback disabled (default)
1: Callback enabled, No password needed, callback number only in position 1
in *wcbtab (wcbtab1)
If “*wcbtab1” is empty no callback will be initiated.
2: Callback enabled, No password needed, callback to incoming number
No “RING” message will be sent to the local serial port at that time.
If the Caller ID is present the modem will callback to this number after the time of
WCBTIME.
When the connection is established CONNECT message will be sent to the DTE
interface.
Note that WCID must be enabled and set to the correct format for this function to
operate properly.