Siemens TC63 Benutzerhandbuch

s

TC63_ATC_V00.490

Page 24 of 501

5/24/05

Confidential / Draft - Do not copy

In the event that an MS receives a code where a symbol is not represented in Figure 

  the MS shall display the character shown in the main default 7 bit alphabet table

(see Figure 

). 

This section provides basic information on how to handle input and output character conversion for SMS text

mode and Remote-SAT if internal (TA) and external (TE) character representation differ, i.e. if the Data Coding

Scheme and the TE character use different coding. 

 Note: The ratio of SIM bytes to output bytes is given in parentheses.

Case 1

Every GSM character is sent to TE as it is (8-bit value with highest bit set to zero).

Example: 47'H, 53'H, 4D'H 

→ 47'H, 53'H, 4D'H, displayed as "GSM"

Case 2

Every data byte will is sent to TE as 2 IRA characters each representing a halfbyte.

Example: B8'H (184 decimal) 

→ 42'H, 38'H, displayed as "B8"

Case 3

Every 16-bit UCS2 value is sent to TE as 4 IRA characters.

Example: C4xA7'H (50343 decimal) 

→ 43'H, 34'H, 41'H, 37'H, displayed as "C4A7"

Problem: An odd number of bytes leads to an error because there are always two bytes needed for each USC2

character

Case 4

Every GSM character is sent to TE as 4 IRA characters to show UCS2 in text mode.

Example: 41'H ("A") 

→ 30'H, 30'H, 34'H, 31'H, displayed as "0041"

Case 5

Every data byte is sent to TE as IRA representation of UCS2 (similar to case 4).

Example: B2'H 

→ 30'H, 30'H, 42'H, 32'H, displayed as "00B2"

Case 6

Every 16-bit value is sent to TE as IRA representation of it. It is assumed that number of bytes is even.

Example: C3x46'H 

→ 43'H, 33'H, 34'H, 36'H, displayed as "C346"

Used character set

DCS = 7 bit

GSM

DCS = 8 bit

Data

DCS = 16 bit

UCS2

GSM

Case 1

GSM (1:1)

Case 2

8 bit to IRA (1:2)

Case 3

UCS2 to IRA (2:4)

UCS2

Case 4

GSM to IRA (1:4)

Case 5

8 bit to IRA (1:4)

Case 6

UCS2 to IRA (2:4)