AT Command Set
Preliminary
21
Order No. DM336P-002-01
Version : DM336P-AT-P04
PART V: S Registers
Register
S0
: Auto Answer Ring.
Assigning a value from 1 to 255 in Register S0 tells the modem the number of rings that must occur before it can
automatically answer incoming calls. The default value = 0 ( no Auto Answer).
Register
S1
: Count Incoming Rings.
The S1 register records the number of incoming rings. Reset to 0 after 8 seconds of no ring.
Register
S2
: Value of the Escape Character.
Register S2 sets the ASCII value in decimal of the escape character. The default value (decimal 43) is equivalent
to the ASCII character '+'.
You can change this register to any value from 0 to 255. Values greater than 127 disable the escape feature.
Register
S3
: Value of the Carriage Return Character.
Register S3 sets the ASCII value in decimal of the carriage return character (End-Of-Line). The default value is 13.
You can change it to any ASCII value between 0 and 127.
Register
S4
: Value of the Line Feed Character.
Register S4 sets the ASCII value in decimal of the line feed character. The default value is 10. You can change it
to any ASCII value between 0 and 127. If you do not want to receive a line feed character, you can change the
value in this register to a null character, but you cannot disable line feed characters.
Register
S5
: Value of the Backspace Character
Register S5 sets the ASCII value in decimal of the backspace character. This character is the character created by
pressing BACKSPACE key and the characters echo to host are BACKSPACE, SPACE, BACKSPACE ( i.e. move
the cursor to the left ). The default value is 8. You can change it to any ASCII value between 0 and 32, or 127.
