XLINK 500/100 Operations & Maintenance Manual page # 38
Paste the following command to the modem:
AT&F&D0&S1&K3S0=1S2=255
Press ENTER and the modem should reply 'OK'
Paste the following command to the modem:
ATE0Q1&W
Press ENTER
After the modem has been dumbed down by these commands it will not even say 'OK' to an AT
command anymore. To see if it's still working you may try a command with a non-simple
response such as AT&V
To configure XLink to answer at 115200, USB connect with LinkComm, use the Diagnostics,
Terminal window. Press ENTER to get the ">" prompt and issue the following:
RS232 Baud Rate=115200
Then reboot the unit for the new baud rate to take effect by issuing the Reboot command or
power cycling the unit.
The modem will now automatically answer calls and provide remote communications.
See “
” for instructions on how to use LinkComm with the
external modem.
4.26.
Connecting External Cell Modems
You can connect an external cell modem for remote communication via LinkComm or other
communication programs. The following details show how to do this using Sutron’s GPRS
-1-O
modem that is preconfigured to operate as a client serial bridge to accept connections and pass
data between XLink and the remote caller. The modem will connect to the RS-232 port via a
male-male null modem cable.
Follow these steps to configure the GPRS-1-O modem to operate in serial bridge mode.
1) Creating/selecting the script. Some readymade scripts are provided based on typical settings
and common APNs. Go ahead and use ATT_script.txt, T-Mobile_script.txt, or Rogers_script.txt if
you are using either of these providers. Otherwise, contact Sutron for help in creating the proper
files for the modem.
2) Load the script into a thumb drive. The file must be copied into the station folder and must be
renamed with the station as part of the file name. For instance, if the station was named S01,
then the file must be renamed "S01_script.txt"
3) Attach the modem to the RS-232 port and insert the thumb drive. Look for a script_results.txt
in the daily sub-folder and examine it for errors. Once the modem is working, enable passwords
to help secure the station.
The script is designed to be run on a factory fresh modem or one that's already running the
script. The script will switch the speed of the RS-232 port to 115200 baud.
