ZyXEL Communications U-336R, User Manual

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Leased Line Operation 37
configuration. Be sure that one modem is set to originate mode and
the other to answer mode.
AT-Command Description
AT*M0 When operating over a leased line, modem will
handshake in originate mode. (Default)
AT*M1 When operating over a leased line, modem will
handshake in answer mode.
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
backup option is disabled.
•
If the dial backup is enabled, the originating modem attempts to
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.
Dial Backup
The dial backup option can be set by issuing an asynchronous AT
command from the terminal, or by using the RS-1612 LCD control
panel.
AT-Command Description
AT*B0 Leased-line dial backup disabled (Default).
AT*B1-50 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.