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S1 Ring Counter
Range: 0−255
Default: 0
Units: rings
This register, Ring Counter, is read only. The value of S1 is incremented with each
ring. If no rings occur over a six second interval, this register is cleared.
S2 AT Escape Character (user defined)
Range: 0−255
Default: 43
Units: ASCII
This register determines the ASCII valued used for an escape sequence. The default is
the + character. The escape sequence allows the modem to exit data mode and enter
command mode when on-line. Values greater than 127 disable the escape sequence.
S3 Command Line Termination Character (user defined)
Range: 0−127, ASCII decimal
Default: 13 (carriage return)
Units: ASCII
This register determines the ASCII values as the carriage return character. This char-
acter is used to end command lines and result codes.
S4 Response Formatting Character (user defined)
Range: 0−127, ASCII decimal
Default: 10 (line feed)
Units: ASCII
This register determines the ASCII value used as the line feed character. The modem
uses a line feed character in command mode when it responds to the computer.
S5 Command Line Editing Character (user defined)
Range: 0−32, 127
Default: 8 (backspace)
Units: ASCII
This register sets the character recognized as a backspace and pertains to asynchro-