Specifications

152 MultiModemISI Hybrid Series, ISIHI-2S/2U
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 carry out most commands.
A Force 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 carry out.
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
B15 Select V.21 when the modem is at 300 bps
B16 Select Bell 103J when the modem is at 300 bps
&Bn Dummy command
Cn Dummy command
&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