IBM Aptiva Handbook page 146

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Table 1: AT commands
Command
A
A/
D
E0
E1
+++
H0
H1
I0
I1
B-6 Appendix B: Modem information
Answers incoming call
Repeats the last command given. Note: Do not precede by AT or follow by Enter
0-9, A-D, # and *
L = last number redial
P = pulse dial
T = tone dial
W = wait for second dial tone
V = switch to speakerphone mode
, = pause
@ = wait for five seconds of silence
! = flash
;= return to command mode after dialing
Commands echo disabled
Commands echo enabled
Escape characters - switch from data mode to command mode
Modem on-hook (hang-up)
Modem off-hook (make busy)
Firmware and device ID
Checksum code
Function