39
Modem AT Commands
The tables of this section list typical modem AT command sets.
Table 39-1 AT Commands with No Lead-in Character
Command
B, B0
E1
H, H0
N1
Q, Q0
T
V1
W2
X4
Y, Y0
Z, Z0
Description
ITU-T (CCITT) V.22 mode when at 1200 bps; V.21 at
300 bps
Enable character echo to terminal in command mode
Go on-hook (hang up)
Connection speed set to highest possible DCE rate,
Automode
Modem returns result codes (Quiet disabled)
Tone dialing
Full-word result codes (Verbose enabled)
Negotiation progress codes disabled. Result code is
DCE rate
Modem recognizes dialtone and busy, CONNECT
nnnn result code enabled
Disable long-space disconnect
Reset modem and recall User Profile 0