S21 - v.24/general bit mapped options status, S22 - speaker/results bit mapped options status – Longshine LCS-8560C1 User Manual
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AT Commands for CX81801/CX06833/CX81300/CX06827 Modems Reference Manual
Conexant
102184B
3-112
S21 - V.24/General Bit Mapped Options Status
S21 indicates the status of command options.
Default: 52 (34h) (00110100b)
Bits 0 - 1 Reserved (0)
Bit 2
CTS behavior (&Rn)
0 =
CTS tracks RTS (&R0)
1 =
CTS always on (&R1) (Default.)
Bits 3-4 DTR behavior (&Dn)
0 =
&D0 selected
1 =
&D1 selected
2 =
&D2 selected (Default.)
3 =
&D3 selected
Bit 5
RLSD (DCD) behavior (&Cn)
0 =
&C0 selected
1 =
&C1 selected (Default.)
Bit 6
DSR behavior (&Sn)
0 =
&S0 selected (Default.)
1 =
&S1 selected
Bit 7
Long space disconnect (Yn)
0 =
Y0 (Default.)
1 =
Y1
S22 - Speaker/Results Bit Mapped Options Status
S22 indicates the status of command options.
Default: 117 (75h) (01110101b)
Bits 0-1 Speaker volume (Ln)
0 =
Off (L0)
1 =
Low (L1) (Default.)
2 =
Medium (L2)
3 =
High (L3)
Bits 2-3 Speaker control (Mn)
0 =
Disabled (M0)
1 =
Off on carrier (M1) (Default.)
2 =
Always on (M2)
3 =
On during handshake (M3)
Bits 4-6 Limit result codes (Xn)
0 =
X0
4 =
X1
5 =
X2
6 =
X3
7 =
X4 (Default.)
Bit 7
Reserved