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July 21, 2010
9:02 am
Jose Maria

Dear Henk,

thank you for your reply. I've tried this configuration and works properly with a Wavecom Modem 900P.

Set the DeliveryConfirmation Advanced option to True.

Set the baudrate of the GSM modem to 19200 because don't support another baudrate.

With those settings the modem don't restart and I can send messages with characters like @#% or characters like á, é, ...

Than you very much for your support.

Kind Regards.

July 20, 2010
3:50 pm
Henk Helmantel

The log file shows that your GSM modem does not respond when the software sends the 118 character message. After 30 seconds Diafaan SMS Server generates a timeout and restarts the GSM modem. The most likely cause is a bug in the firmware of the GSM modem, maybe only in combination with certain GSM networks or base stations. I recommend a firmware update to the newest version of the GSM modem software, unfortunately it is not possible to flash the firmware of a Wavecom GSM modem yourself since you need a special cable that is only supplied to Wavecom distributors.

It is unlikely but there are a couple of things you could try that might just work:

  • Use a SIM card from another GSM network.
  • Set the DeliveryConfirmation Advanced option to False
  • Set the baudrate of the GSM modem to 115200 (see the manual of the GSM modem for instructions)  and change the baudrate settings in the Advanced Properties.
July 20, 2010
12:01 pm
Henk Helmantel

The BasicTextMode is intended for incompatible GSM modems and (CDMA) networks that do not support full GSM compatible SMS messages. As you already have noticed it only allows sending messages with basic alphanumeric characters and digits.

I would like so have a look at the communication log file, please send the file to To enable logging, set LogCommunicationToFile in the Advanced gateway properties to True. Then send two messages, one with less than 118 characters and one with more characters.

July 20, 2010
8:59 am
Jose Maria

Dear sir,

I am testing Diafaan Server SMS Light Edition with a Wavecom Modem 900P. I am using a e-mail conector to send the sms message. If the message text has more of 118 characters the modem restarts and the message isn't sended. The compatibilitymode is set as Normal. The modem works fine if the compatibility mode is set to BasicTextMode but in this mode the @ character is not well represented in the cellular. I have configured a message template as [from-address], [message-text]. So the receptor of the sms can identify the sender with the [from-address]. So is very important the correct visualization of the @ character. Why is the reason of the modem reset when the message is medium/large? Do you need the communication log?

Thank you very much.

Kind Regards.

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