Why does the SMS transmission on a PCD3 WAC sometimes fail?

FAQ #101564

 

Solution
To solve the problem there exist two possibilities:

• Use the hardware reset of the GMS modem after each sending of SMS or if the transmission of an
  SMS message fails.
  The flag for resetting the modem is mapped to the IO.DigitalOutput7 of the device configurator of PG5 2.0 (see below).
• Use a PCD3 WAC with HW version B or higher.
  

Remarks

• To ensure a high availability of the PCD3 WAC on the GSM/GPRS network, it is strongly recommend to reset the GSM modem regularly (e.g. once at day as done also from other GSM/GPRS modem supplier).
• The reset of the GSM modem could be performed by setting the Flag which is mapped to the IO.DigitalOutput7 of the device configurator of PG5 2.0.
  To use this reset function at least the I/O board FW 1.00.11 is required (all PCD3 WAC deliverd after July 2010 do have this or a more recent I/O board firmware).
  In case you have a pilot version (e.g. hardware version A), please ask your local sales representative for the I/O board FW 1.00.11 or later.
• Make sure that the modem is not used by the programmed application if the reset of the GSM modem is performed.