Digi LR54 User Manual page 240

Serial port
15. (Optional) Configure a script that will be run to prepare the link before PPP negotiations are
started:
a. Enable the use of a connection script.
(config)> serial port1 ppp_dialin connect enable true
(config)>
b. Set the name of the script:
(config)> serial port1 ppp_dialin connect script filename
(config)>
Scripts are located in the /etc/config/serial directory. An example script, windows_dun.sh
is provided.
Example windows_dun.sh file:
#!/bin/sh
# Example connect script for connecting from a PC using a Windows
dial-up
# networking connection with built-in standard 33600 bps modem driver
and phone
# number 123.
# The shell's 'read' builtin breaks on newline, so translate incoming
carriage-
# return to newline, and outgoing newline to carriage-return-newline.
stty icrnl onlcr opost
# Read input from the serial port, one line at a time.
while read -r line; do
case "$line" in
esac
done
16. Save the configuration and apply the change:
(config)> save
Configuration saved.
>
17. Type exit to exit the Admin CLI.
Depending on your device configuration, you may be presented with an Access selection
menu. Type quit to disconnect from the device.
LR54 User Guide
ATDT123)
echo "CONNECT" # instruct the peer to start PPP
exit 0 # start up the local PPP session
;;
AT*)
echo "OK" # passively accept any other AT command
;;
Configure PPP dial-in mode
240