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AT or follow with ENTER
A Answer
D_ Dial command
P Select pulse dialing; affects current and subsequent dialing
T Select tone dialing; affects current and subsequent dialing
EnCommand echo
E0 Disables echo
E1 Enables echo (default)
HnSwitch hook Control
H0 Hangs up the telephone line (default)
H1 Picks up the telephone line
LnSpeaker volume
L0 Off or low speaker volume
L1 Low volume
L2 Medium volume (default)
L3 High volume
AT Commands Affecting ITU-T V.90 Operation
There are 3 S-registers which support K56flex, V.90, and V.34 connections. S38 sets
the maximum downstream speed that the modem attempts to connect. To disable
V.90, set S38 to 0. The S37 register is used to control the upstream V.34 rate. Use the
S109 register to select between K56flex and V.90 protocols.
S37 Dial Line Rate (default 0)
S37 = 0 maximum modem speed (default)
S37 = 1 reserved
S37 = 2 1200 bits/s and 75 bits/s
S37 = 3 300 bits/s
S37 = 4 reserved
S37 = 5 1200 bits/s
S37 = 6 2400 bits/s
S37 = 7 4800 bits/s
S37 = 8 7200 bits/s
S37 = 9 9600 bits/s
S37 = 10 12000 bits/s
S37 = 11 14400 bits/s
S37 = 12 16800 bits/s
S37 = 13 19200 bits/s
S37 = 14 21600 bits/s
S37 = 15 24000 bits/s
S37 = 16 26400 bits/s
S37 = 17 28800 bits/s
S37 = 18 31200 bits/s
S37 = 19 33600 bits/s