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In addition to trying to send the data coding value to the SMSC, the Camel component also tries to analyze the message body, convert it to a Java String (Unicode) and convert that to a byte array in the corresponding alphabet  When deciding which alphabet to use in the byte array, the Camel SMPP component does not consider the data coding value (header or configuration), it only considers the specified alphabet (from either the header or endpoint parameter).

.  If some characters in the String can't be represented in the chosen alphabet, they may be replaced by the question mark ( ? ) symbol.  Users of the API may want to consider checking if their message body can be converted to ISO-8859-1 before passing it to the component and if not, setting the alphabet header to request UCS-2 encoding.  If the alphabet and data coding options are not specified at all then the component may try to detect the required encoding and set the data coding for you.

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