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8.
APPENDIX C: AT COMMAND
QUICK REFERENCE
8.1 Modem AT Commands
Basic AT Command Set
Command
Options
Function & Description
A/
Re-execute the last command
string
<any
key>
Terminate the current
connection attempt when
entered in handshaking state
All the following commands require an “AT”
prefix
A
Go off-hook and attempt to
establish a connection
without waiting for a ring
Bn
Line modulation options
B0
Select V.22 mode for 1200
bps connection
B1 *
Select Bell 212A for 1200
