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ATBn Select Communications Standard
Your modem is capable of connecting to remote systems using a variety of communications
standards. This command enables you to select the communications standards you want to use.
The performance of V.90 and K56flex are very similar. The main difference is the connect speeds
available for K56flex and V.90. The following speeds are available when your modem is using
V.90:
Command Speed
B0 ■ Auto-Connect
B1 Auto-Connect
B2 Auto-Connect
B3 V.21 at 300bps
B4 Bell 103 at 300bps
B5 V.23 at 1200/75bps
B6 V.22 at 1200bps
B7 Bell 212A at 1200bps
B8 V.22bis at 2400bps
B9 Auto-Connect
B10 V.32 at 4800bps
B11 V.32 at 7200bps
B12 V.32 (Non-TCM) at 9600bps
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