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SMS MESSAGE TEXT FORMAT
Text Coding
Due to the way in which the cellular carriers perform character translation of standard ASCII characters, users are
strongly urged to limit themselves to the following character set:
! # % & ' ( ) * + , - . / 0 . . . 9 : ; < = > ? A . . . Z a . . . z
These characters are guaranteed to arrive at the destination unaltered, even to a mobile device.
Character Translation
Received SMS messages will have escape sequences inserted. Sent messages will be translated as follows:
- Text that is sent starting with the first character after the comma, up to and not including a carriage-return or line-
feed, unless the first character is a double-quote.
- If the first character after the comma is a double-quote, then the text will be translated according to the following
rules:
• A small subset of standard escape characters are translated into their ASCII equivalent. (See the following table
SMS Escape Sequences.)
• Double-quote must be escaped (\").
• The message text ends with a trailing double-quote.
SPACE
" (\")
LF (\n)
CR (\r)
Table 31 SMS Escape Sequences
Escape Sequence
\n
\r
\"
Vanguard 3000 Series Multicarrier Cellular Data Modem & IP Router PN 001-7300-100 Rev. B
ASCII out
HEX out
LF
0A
CR
0D
"
22
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