when we are sending an SMS from our device with Wavecom module to a phone in the conventional telephone network in Germany using either T-D1 or Vodafone-D2 as mobile provider, the SMS will be rendered in speech and read out on the receiving phone.
So far, so good!
When a customer in Austria tried this using our device (with Q2406B module) and A1 as mobile provider, he will not get the spoken text. In fact he will not get any indication on the convetional destination phone. But when he transfers the SIM card into a cell phone and sends an SMS from the cell phone to the same conventional phone it does work! The SMS will be read! So it does work as desired from a commercial mobile phone but does not work from our emergency phone using the Wavecom module.
And these two other scenarios also do not work:
Sending SMS from mobile with Wavecom module in Germany to conventional phone in Austria
Sending SMS from commercial mobile phone in Austria to conventional phone in Germany
This is what we use in our emergency phone:
Firmware: 640b09gg.Q2406B 1272884 070403 16:03
(SMS is sent in text mode)
I’m really clueless here… The only thing I am sure of is that the Wavecom module does not do the text-to-speech function. Do you know who does? Is it the mobile phone network operator, or the conventional telephone network operator? Is it possible that this depends on the country? Are there any settings one should set in order to ensure it works? Is it possible that it would work when sending SMS in PDU mode instead of text mode? Or does it require SIM-Toolkit functions we do not use?
Thanks in advance for your insights!