Siemens TC63 Manual Do Utilizador

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TC63_ATC_V00.490

Page 334 of 501

5/24/05

Confidential / Draft - Do not copy

• If writing fails due to timeout, then 

=1 causes "+CMS ERROR: Unknown error" to be returned;

=0 causes "+CMS ERROR: timer expired" to be returned. 

• Note that some providers do not recognize an @ symbol used in a short message. A widely used alternative

is typing "*" as defined in GSM 03.40 (GPP TS 23.40). 

• For baudrates lower than 19200 it is recommended to use the line termination character only (refer to 

=

, default 

) before entering the text or PDU. Use of the line termination character followed by the

response formating character (see 

= 

, default 

) may cause problems. 

• SMS-COMMANDs and SMS-STATUS-REPORTs cannot be stored in text mode. 
• All characters entered behind the ">" prompt will be recognized as GSM characters. For example, "Back-

space" (ASCII character 8) does not delete a character, but will be inserted into the short message as an addi-

tional physical character. As a result, the character you wanted to delete still appears in the text, plus the GSM

code equivalent of the Backspace key. 

• In text mode, the maximum length of an SMS depends on the used coding scheme: It is 160 characters if the

7 bit GSM coding scheme is used, and 140 characters according to the 8 bit GSM coding scheme. 

• The length of 8-bit data coded short messages has to be greater than 0.