I'm trying to send an SMS in PDU mode using kannel gatewy 1.0.3 and a GSM Modem. I can not get it to work, the modem returns OK after the send command is issued but nothing never comes to the mobile phone. I know many messages have been exchanged previously about this topic.. pdu_encode in smsc_at.c is probably not correct, but I could not find in the archives a clear solution of my problem... Here are the commands I'm sending : First Command: AT+CMGS=54 Second Command: 004100099160714598F700042A0933460504158100003344024A3A51D195CDD004001B205505 90610560558550548540820849900000 using the URL : http://131.107.0.15:12345/cgi-bin/sendsms?username=user&password=pass&to=061 754897&udh=3D%06%05%04%15%81%00%00&text=3D%02%4A%3A%51%D1%95%CD%D0%04%00%1B% 20%55%05%90%61%05%60%55%85%50%54%85%40%82%08%49%90%00%00