Appendix

Appendix I: AT Command Summary (Modem)

COMMAND DESCRIPTION

AT

Attention Code

 

The attention code precedes all command lines except A/ and the escape sequence.

RETURN

RETURN Key

or ENTER Press the RETURN (ENTER) key to execute most commands.

AForce Answer Mode

Answer call immediately without waiting for ring.

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

Answer Tone

 

n = 0, 1, 2, 3, 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

&Bn

V.32 Auto Retrain

 

n = 1

 

 

&B1

Enable V.32 auto retrain

%B

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.

Cn

Carrier Control

 

n = 1

 

 

C1

Normal transmit carrier switching (included for backward compatibility with some software)

&Cn

Carrier Detect Control

 

n = 0 or 1

 

&C0

Force Carrier Detect on

 

&C1

Let Carrier Detect follow carrier signal

-Cn

Data Calling Tone

 

n = 0 or 1

 

-C0

Disable V.25 data calling tone

 

-C1

Enable V.25 data calling tone

%Cn

Data Compression Control

 

n = 0 or 1

 

%C0

Disable V.42bis / MNP 5 data compression

 

%C1

Enable V.42bis / MNP 5 data compression

Ds

Dial

 

 

s = phone #

 

Dial telephone number s, where s may include up to 40 alpha-numeric characters, and the L, P,

 

T, V, W, comma (,), colon (:), semicolon (;), !, $, @ and ^ dial string modifiers

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MultiModemISI Hybrid Series, ISIHI-2S

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Multi Tech Equipment ISIHI-2S manual Appendix I AT Command Summary Modem, Command Description
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