DCT Syrus - GSM and GPRS Network Setup; SIM Card PIN Configuration

rev1 – Dec 2013 www.digitalcomtech.com 23
Enabling the unit on GSM and GPRS
Syrus Commands: RF, XANS
The GSM registration as well as the GPRS attachment (getting a valid IP address from the
cellular operator) is automatically done by the unit all the time. This means that whenever
there is GSM and GPRS network availability and the unit is correctly configured it is
going to be GPRS attached (The green NET LED will be blinking quickly twice). The
SIM card's PIN and the cellular operator APN (Access Point Name) are required by the
unit to be GPRS attached.
SIM Card's PIN for GSM registration
This parameter is optional because it depends on how the SIM card is configured. Most
cellular operators distribute no-pin SIM cards so you don't have to worry about this
parameter or you can explicitly set it to "empty" if you are unsure of a previous
configuration. But if your SIM card requires a PIN this parameters has to be set or else the
unit will fail to register on GSM. The configuration message for the SIM card's PIN is
the RF message. This message is used as follows:
To set the PIN number 1234 send to the unit:
>SRFI1234<
To set an "empty" PIN:
>SRFI<
Use the Q qualifier to consult the currently set value.
A PIN configuration can be issued at any time but even though the registration process is
always done automatically, the unit will take some time on registering to the GSM
network when a previous erroneous PIN was given or when no PIN was given. So it is
recommended in those cases to reset the unit after the PIN-set command with the >SRT<
reset message. Or better, have the PIN correctly configured before the SIM card is
inserted.
Warning: The Syrus may block the SIM card when a wrong PIN is configured.
The GSM registration status can be consulted with the XANS message and/or with the
NET (green) LED. When the unit is GSM-registered it is able to make or receive
telephone calls and 2-way SMS communication.
Warning: The PIN may be changed over the air which will cause the Syrus to loose
communications with the server.