C55/C55i AT COMMAND SET Description Preliminary - Falcom

C55/C55I AT COMMAND SET VERSION 1.00
0.5.2.1 Implementing input of Terminal data to SIM (direction TE to ME)
CSCS dcs GSM UCS2
7-Bit (GSM default) Case 1 GSM (1:1) Case 4 UCS2 to GSM (2:1)
8-Bit Case 2 IRA (1:1) Case 5 UCS2 to GSM (2:1)
16-Bit (UCS2) Case 3 IRA (2:2) Case 6 IRA (2:2)
Case 1
Data will be packed to 7-bit.
Maximum text length: 160 characters
Example: "AB" → 0x41,0x21
Case 2
Data will be saved without any conversion.
Maximum text length: 280 characters
Example: "4142" →0X41 ,0X42
Problems:
• "8f" → Error (invalid GSM character)
Case 3
Two bytes are needed. No conversion.
Maximum text length: 280 characters
Example: "0041" -^ 0x00,0x41
Problems:
• "41" → Error (there are two bytes needed)
Case 4
Two bytes are needed. Two bytes will be converted to 1 byte GSM and
7-bit packed.
Maximum text length: 640 characters
Example: "00410042" → 0X41,0X21
Problems:
• "41" → Error (there are two bytes needed)
• "4142" → Error (invalid character)
• "0000" → Error (not an UCS2 character)
• "007B" → 0x1 B,0x28 (The saved data are two bytes long, not 1
byte like in all other cases. This effects the maximum input length of
a string)
Case 5
Two bytes are needed. Two bytes will be converted to 1 byte GSM.
Maximum text length: 560 characters
Example: "00410042" → 0X41 ,0X42
Problems:
• "41" → Error (there are two bytes needed)
• "4142" → Error (invalid character)
• "0000" → Error (not an UCS2 character)
• "007B" → 0x1 B,0x28 (The saved data are two bytes long, not 1
byte like in all other cases. This effects the maximum input length of
a string).
Case 6
Two bytes are needed.
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