Leased-Line Dial Backup; Dial Backup - ZyXEL Communications U-336S User Manual

AT-Command Description
AT*M0
AT*M1

Leased-Line Dial Backup

When a leased-line connection fails, the following actions may be
taken by the modem:
• Reattempt to connect on the leased line indefinitely if the dial
• If the dial backup is enabled, the originating modem attempts to

Dial Backup

The dial backup option can be set by issuing an asynchronous AT
command from the terminal, or by using the front panel control.
AT-Command Description
AT*B0
AT*B1-50
The originating modem will try to dial the number up to nine times
or until a 3-minute time-out is activated. If the dial backup attempt
When operating over a leased line, modem will
handshake in originate mode. (Default)
When operating over a leased line, modem will
handshake in answer mode.
backup option is disabled.
dial a pre-stored telephone number to backup the connection;
the answering modem will reattempt to connect to the leased
line and monitor the dial-up line for rings. Incoming dial-backup
calls will be answered.
Leased-line dial backup disabled (Default).
When the leased-line cannot continue operation,
the originate mode modem will automatically
dial the number stored in the memory address
selected. The answer mode modem will monitor
the dial-up line for rings.
Leased Line Operation 45