Installation guide
S-Register Definitions
Chapter 3 Modem Emulation Commands 159
S-Register Definitions
Following is a description of the S-registers that can be set.
Register Function Range Units Default
S0
Rings to Auto-Answer. Sets the number of rings required
before the Digi device automatically answers a call.
Setting this register to Zero disables auto-answer mode.
0-255 Rings 0
S1
Ring Counter. Specifies the current number of rings. S1
is incremented each time the modem detects a ring
signal on the telephone line. S1 is cleared when the
existing connection is established or dropped.
0-255 Rings 0
S2
Escape Character. S2 holds the value of the ASCII
character used as the escape character. The default
value corresponds to an ASCII '+'. A value over 127
disables the escape process. That is, no escape
character will be recognized.
0-255 ASCII 43
S3
Carriage Return Character. Sets the value of the
carriage return character used when displaying
commands or results.
0-127 ASCII 13
S4
Line Feed Character. Sets the character recognized as
a line feed when displaying commands or results. If
verbose result codes are used, the Line Feed control
character is output after the Carriage Return control
character.
0-127 ASCII 10
S5
Backspace Character. Sets the character recognized as
a backspace, used to erase the last character typed on
the command line.
0-32 ASCII 8
S12
Escape Prompt Delay. The amount of time required
before and after an escape sequence (+++) is entered in
order for the modem to transition from data mode to
command mode.
0-255
0.02
second, 20
ms
50
1 second
S14
General Options Status. Indicates the status of
command options.
• Default: 138 (8Ah) (10001010b)
• Bit 0: Ignored.
• Bit 1: Command echo (En):
0 = Disabled (E0).
1 = Enabled (E1). (Default.)
• Bits 2 and 4: Quiet mode (Qn):
0 = Display result codes (Q0). (Default.)
1 = Do not display result codes (Q1).
2 = Disables “CONNECT” result codes (Q2).
3 = Disables “CONNECT” result codes on incoming
connections (Q3).
• Bit 3: Result codes (Vn):
0 = Display numeric result codes (V0).
1 = Display verbose result codes (V1). (Default.)
• Bits 5-7: Ignored.
138 (8Ah)