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S22 Bit mapped configuration register
Bit 01
00
Speaker volume low (L0)
01
Speaker volume low (L1)
10
Speaker volume medium (default L2)
11
Speaker volume high (L3)
Bit 23
00
Speaker disabled (M0)
01
Speaker on until carrier detected (default M1)
10
Speaker always on (M2)
11
Speaker on until carrier detected but off during dialing (M3)
Bit 456
000
Select basic result code set (X0)
100
Select first extended result code set (X1)
101
Select second extended result code set (X2)
110
Select third extended result code set (X3)
111
Select fourth extended result code set (default x4)
Bit 7
0
Make/Break ratio is 39/61 for US (default & P0)
1
Make/Break ratio is 33/67 for UK/HK (&P1)
S23 Bit mapped configuration register
Bit 0
Unused
Bit 123
000
Communications rate-300 bps
001
Communications rate-600 bps
010
Communication rate-1200 bps
011
Communications rate-2400 bps
100
Communications rate-4800 bps
101
Communications rate-9600 bps
Bit 45
00
Even parity selected (AT entered in even parity)
01
Space parity selected (At entered in space parity)
10
Odd parity selected (AT entered in odd parity)
11
Mark parity selected (AT entered in mark parity)
Bit 67
00
No guard tone (default &G0)
01
550 Hz guard tone (&G2)
10
1800 Hz guard tone (&G2)
11
Unused
Fax/Modem B-11