UNIVERSITI TEKNOLOGI MALAYSIA - FKE - UTM

31C8Type-of-address of the sender number72 38 88 09 00 F1 Sender number (decimal semi-octets), with a trailing F00 TP-PID. Protocol identifier.00 TP-DCS Data coding scheme99 30 92 51 61 95 80 TP-SCTS. Time stamp (semi-octets)0ATP-UDL. User data length, length of message. The TP-DCS field indicated 7-bit data, so the length here is thenumber of septets (10). If the TP-DCS field were set toindicate 8-bit data or Unicode, the length would be thenumber of octets (9).E8329BFD4697D9EC37TP-UD. Message "hellohello" , 8-bit octets representing7-bit data. (For A300, the 8-bit data coding contain here)Table 4.1 Description of message ‘hellohello’ in PDU mode4.3.2.2 Coding 7-bit data (septets) into octetsSMS messages use 7-bit data coding instead of 8-bit. By doing this, we cansave one bit space. The message "hellohello" consists of 10 characters, calledseptets when represented by 7 bits each. These septets need to be transformed intooctets for the SMS transfer.h E l l o h e l l o104 101 108 108 111 104 101 108 108 1111101000 1100101 1101100 1101100 1101111 1101000 1100101 1101100 1101100 11011111101000 110010 1 11011 00 1101 100 110 1111 11 01000 1 100101 1101100 1101100 110111 1Table 4.2a Coding of message ‘hellohello’ from septets into octetsThe first septet (h) is turned into an octet by adding the rightmost bit of the secondseptet. This bit is inserted to the left which yields 1 + 1101000 = 11101000 ("E8").