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E AT Command Summary
Appendix E AT Command Summary
Command
Values
Description
AT
n/a
Attention Code
The attention code precedes all command lines
except A/ and the escape sequence.
RETURN or
ENTER
n/a
RETURN Key
Press the RETURN (ENTER) key to execute most
commands.
A
n/a
Force Answer Mode
Answer call immediately without waiting for ring.
A/
n/a
Repeat Last Command
Repeat the last command string. Do not precede this
command with AT. Do not press RETURN (or ENTER)
to execute.
Bn
n = 0, 1, 2, 3,
Answer Tone
15, or 16
*** B0 Select ITU-T V.22 mode when modem is at
1200 bps.
*** B1 Select Bell 212A when modem is at 1200 bps.
B2 Deselect V.23 reverse channel.
B3 Deselect V.23 reverse channel.
B15 Select V.21 when the modem is at 300 bps.
*** B16 Select Bell 103J when the modem is at 300 bps.
n=1
V.32 Auto Retrain
*** &B1 Enable V.32 auto retrain.
&Bn
%B
n/a
Cn
n=1
&Cn
n = 0 or 1
-Cn
n = 0 or 1
Data Calling Tone
*** -C0 Disable V.25 data calling tone.
-C1 Enable V.25 data calling tone.
%Cn
n = 0 or 1
Data Compression Control.
%C0 Disable V.42bis / MNP 5 data compression.
*** %C1 Enable V.42bis / MNP 5 data compression.
CommPlete Communications Server
View Numbers in Blacklist
If blacklisting is in effect, this command displays the
numbers for which the last call attempted in the
previous two hours failed. In countries that do not
require blacklisting, the ERROR result code appears.
Carrier Control
*** C1
Normal transmit carrier switching (included for
backward compatibility with some software).
Carrier Detect Control
&C0 Force Carrier Detect on.
*** &C1 Let Carrier Detect follow carrier signal.
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