31 18 => 1Σ according to GSM (http://www.developershome.com/sms/gsmAlphabet.asp) and in kannel log is displayed as octets.

The site you mention treats multiple characters in the translation filed as septets, and shifts boundaries, so it is actually translating hex18 as hex30 which is 0, but it is doing this in error.

In any case the text in that PDU is "1Σ", possibly whatever was used to inject a 10 as an incoming message has a similar packing/unpacking problem and injected 3118 where you were trying to put in 3130 (10).

Hope this helps,
Kyriacos

On 07/03/2016 13:04, Ahmed Adel wrote:
Hi Kyriacos,

Thanks for your reply, find attached that full PDU.

--
Regards
Ahmed Adel

On Mon, Mar 7, 2016 at 12:42 PM, Kyriacos Sakkas <kyria...@netsmart.com.cy <mailto:kyria...@netsmart.com.cy>> wrote:

    Can you post the full incoming sms pdu?

    Thanks,
    Kyriacos


    On 07/03/2016 11:03, Ahmed Adel wrote:
    Hi, my Kannel installation wrongly translate GSM 7-bit.

    find here my problem described:
    
http://stackoverflow.com/questions/35801244/kannel-sms-gateway-cannot-decode-gsm-7-bit-encoded-message-properly

    I appreciate if someone can help me.
    --
    Regards
    Ahmed Adel

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