B11 | V.32 at 7200bps |
B12 | V.32 |
B13 | V.32 at 9600bps |
B14 | V.32bis at 12000bps |
B15 | V.32bis at 14400bps |
B16 | V.34 at 14,400bps |
B17 | V.34 at 16,800 bps |
B18 | V.34 at 19,200 bps |
B19 | V.34 at 21,600 bps |
B20 | V.34 at 24,000 bps |
B21 | V.34 at 26,400 bps |
B22 | V.34 at 28,800 bps |
B23 | 31,200 bps |
B24 | 33,600 bps |
B25 | (Reserved) |
B26 | (Reserved) |
B27 | V.34 at 2400bps |
B28 | V.34 at 4800bps |
B29 | V.34 at 7200bps |
B30 | V.34 at 9600bps |
B31 | V.34 at 12,000bps |
B40 | K56flex at 32,000bps |
B41 | K56flex at 34,000bps |
B42 | K56flex at 36,000bps |
B33 | K56flex at 38,000bps |
B34 | K56flex at 40,000bps |
B35 | K56flex at 42,000bps |
B36 | K56flex at 44,000bps |
B37 | K56flex at 46,000bps |
B48 | K56flex at 48,000bps |
B49 | K56flex at 50,000bps |
B50 | K56flex at 52,000bps |
B51 | K56flex at 54,000bps |
B52 | K56flex at 56,000bps |
Appending ! to the B command locks the modem to the specified speed e.g. ATB19! forces the modem to operate only at V.34 21,600bps
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