Westermo RM-455U-D - Manual (Page 36)

Chapter Three Configuration
Man_455U-D Rev 3.04 Page 37
In this example, the destination port is the RS232 port on unit 15, via repeater 31.
If using AT commands:
 Auto connect is set by selecting Unacknowledged mode (AT&M0) and fixed line mode
(AT&L1) and by configuring a destination address into auto dial location 0 (AT&Z0).
 Single connect is set by selecting Unacknowledged mode (AT&M0) and deselecting fixed
line mode (AT&L0). In this mode, the modem will go to command mode as soon as it is
powered up. The RS232 port will print the message “OK” and wait for commands. The
host software chooses which remote module to configure by issuing a dial command
(ATD). As soon as the Dial command is issued, the modem will issue a “Connect”
message and go on-line. This will be indicated by the LINK LED going green. All
messages received at the RS-232 serial port are sent to the dialed address. Use the
wildcard address (0 or 128) to send messages to multiple units in the system.
3.5.3 Unacknowledged mode Repeaters
Every 455U-D module automatically acts as a repeater by including its address in the address
list.
For example, if unit 31 receives a message with address <31,15>, it will repeat the message
onto unit 15. Unit 31 will not output the message on its serial port unless it is configured to
do so.
If you are using repeaters for broadcast messages, care must be taken.