Siemens MC55 manual Cscs GSM UCS2

MC55 AT Command Set

1.5 Supported character sets

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1.5.2.2 Implementing input of Terminal data to SIM (direction TE to ME)

CSCS	GSM	UCS2
dcs
7-Bit	Case 1	Case 4
(GSM default)	GSM (1:1)	UCS2 to GSM (2:1)
8-Bit	Case 2	Case 5
	IRA (1:1)	UCS2 to GSM (2:1)
16-Bit	Case 3	Case 6
(UCS2)	IRA (2:2)	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" ￿ 0x1B,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" ￿ 0x1B,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).

MC55_ATC_V01.05	Page 24 of 469	2/10/04
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