Hi Alessandro, the way Kannel treats your message depend on your parameter settings. Normally text messages are encoded with 7 Bit. If you give a header with the parameter 'udh', Kannel interprets this message as a data message and encodes it in 8 bit.
If you want to give Kannel a data message without an UDH header, you have to use the parameter 'coding': coding=1' stands for a 7 bit decoding while 'coding=2' is used for 8 bit Hope that will help you Thorben Hischke
