30 Quick Start and Reference Guide
Disable both 56K and autorate on V.34—33600
bps
AT S38=0
V.34—33600 bps
AT S37=19
V.32bis—14400 bps
AT S37=11
V.32—9600 bps
AT S37=9
2400 bps
AT S37=6
1200 bps
AT S37=2
Note: Some software allows these commands to be
added to the list of dial prefixes or the initializa-
tion string.
Note: When the protocol is forced, the modem will not
attempt to connect at other protocols if it cannot
connect at the forced protocol. It will try to con-
nect at the fastest speed available within the
forced protocol.
There are other configurations that can be forced as well.
If you need to select a particular configuration, use the
AT command strings shown below. You can always return
to the modem’s default configuration by typing AT &F
and pressing the Enter key.
Remember that if you do this, the modem will not have
received the commands in your software’s initialization
string as it normally would. Using the ATZ command
overcomes this problem if you have saved all of your
setup parameters in nonvolatile memory. (To save setup
parameters in nonvolatile memory in AT terminal mode:
Type AT, followed by the parameter settings you choose,
followed by &W, and press Enter. For example, if you
type AT &C1 &D2 &W and press Enter, the &C1 and
&D2 parameter settings are stored. Refer to the Web page
at www.modems.com for the complete set of AT com-
mands.)
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