Description Of Controls
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Many GSM modems are fitted with a status LED to show operator cell status and ringing indicator. These can be a
useful troubleshooting tool.
In the case of GSM connection problems, try calling the DATA number of the SIMCARD with an ordinary
telephone. There should be two rings, followed by the modem answering the call and then ‘squealing’. If this does
not happen, you should check all modem connections and double check with the SIM provider that it is a DATA
SIM and can operate as a data modem. DATA is NOT the same as FAX or GPRS and is often called Circuit
Switched Data (CSD) by the SIM provider.
NOTE: In the case of GSM modems, it is important that a DATA ENABLED SIM is used. This is often a
different number than the ‘voice number’ and is often called Circuit Switched Data (CSD) by the SIM
provider.
If the GSM modem is not purchased from DSE, ensure that it has been correctly set to operate at 9600 baud.
The DSE Modbus Gencomm document containing register mappings inside the DSE module is available upon
request from support@deepseaplc.com. Email your request along with the serial number of your DSE module to
ensure the correct information is sent to you.
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