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Chapter 12 - Status Registers & Result Codes
12-3
Command bit dec hex Function and description Ref.
S20= dec hex DTE speed (bps). Auto detected from AT
Command
+003
0 0 230400 bps
1 1 115200 bps (Default)
2 2 76800 bps
3 3 57600 bps
4 4 38400 bps
5 5 19200 bps
6 6 16800 bps
7 7 14400 bps
8 8 12000 bps
9 9 9600 bps
10 A 7200 bps
11 B 4800 bps
12 C 2400 bps
13 D 1200 bps
14 E 460800 bps
15 F 300 bps
16 10 307200 bps
17 11 153600 bps
18 12 102400 bps
20 14 61440 bps
21 15 51200 bps
22 16 624000 bps
24 18 124800 bps
25 19 62400 bps
26 1A 41600 bps
27 1B 31200 bps
28 1C 24960 bps
29 1D 20800 bps
46 2E 921600 bps
Note: Only the speeds up to S20=14 are supported by auto speed detection.
S21= bit dec hex Bit mapped register
0 0 0 Maintain non-error control connection when
modem error control handshake fails
*E0
1 1 Drop connection when modem error control
handshake fails
*E1
1-2 0 0 Speaker always OFF M0
2 2 Speaker ON until carrier is detected M1
4 4 Speaker always ON M2
6 6 Speaker ON after last digit is dialed out until
carrier detected
M3
3 0 0 DSR always ON &S0
8 8 According to CCITT (see also S44.4, S41.5) &S1
4 0 0 CD always ON &C0
16 10 CD tracks presence of data carrier (see also
S38.3)
&C1