For user defined text messages, the test set accepts a 7-bit ASCII string. This string is then encoded using the ETSI Default Alphabet before it is transmitted. The ASCII code for each character in this string is mapped to the ETSI Default Alphabet character with the same code. Characters present in the user defined text message whose ASCII and ETSI Default Alphabet codes are not identical will be received and displayed by the mobile station as the ETSI Default Alphabet character with the original ASCII character's code. This behavior is only noticeable with certain user defined text messages as all of the predefined text messages use only alphanumeric and basic punctuation characters.
Transmission of SMS messages necessary for concatenated and binary SMS applications like WAP Push, MMS notifications, ringtones, picture messaging, as well as character based languages such as Chinese, Japanese, and Hebrew that use UCS2 can be done by specifying the entire contents of the Deliver PDU's User Data field, including header information, in hexadecimal characters. You can define the content for the
parameter using the following GPIB command: