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3-1
3. AT Commands
Command: AT Attention Code
Values: N/A
Description: The attention code precedes all command lines except
A/,
A: and escape sequences.
Command: [Enter] Key
Values: N/A
Description: Press the
[Enter] (RETURN) key to execute most
commands.
Command: A Answer
Values: N/A
Description: Answer call before final ring.
Command: A/ Repeat Last Command
Values: N/A
Description: Repeat the last command string. Do not precede this
command with AT. Do not press
[Enter] to execute.
Command: Bn Communication Standard Setting
Values: n = 0–3, 15, 16
Default: 0 and 15
Description: 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 (same as
B3).
B3 Deselect V.23 reverse channel (same as
B2).
B15 Select V.21 when the modem is at 300 bps.
B16 Select Bell 103J when the modem is at 300 bps.