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Data Addendum Host-Based Controller Modem
June 15, 1998 AT Command Set
AT Command Reference (continued)
Version 1.0 Lucent Technologies Inc.
11
On Return On-line to Data Mode
O0: Instructs the modem to exit on-line command mode and return to data mode
(see AT Escape Sequence, +++).
O1: This command issues a retrain before returning to on-line data mode.
O3: This command issues a rate renegotiation before returning to on-line data mode.
Result Codes:
OK n = 0, 1, 3
ERROR Otherwise
P Select Pulse Dialing
This command configures the modem for pulse (non touch-tone) dialing. Dialed digits are pulsed until a T
command or dial modifier is received. Tone dial is the default setting.
Qn Result Code Control
Result codes are informational messages sent from the modem and displayed on your monitor. Basic result
codes are OK, CONNECT, RING, NO CARRIER, and ERROR. The ATQ command allows the user to turn result
codes on or off.
Q0: Enables modem to send result codes to the computer (default).
Q1: Disables modem from sending result codes to the computer.
Result Codes:
OK n = 0, 1
ERROR Otherwise
T Select Tone Dialing
This command instructs the modem to send DTMF tones while dialing. Dialed digits are tone dialed until a P
command or dial modifier is received. This is the default setting.
Vn DCE Response Format
This command controls whether result codes (including call progress and negotiation progress messages) are
displayed as words or their numeric equivalents. For the result code, see table 4.
V0: Displays result codes as digits.
V1: Displays result codes as text (default).
Result Codes:
OK n = 0, 1
ERROR Otherwise
ATV0 ATV1
Result Code Format <numeric code> <CR> <CR> <LF>
<verbose code> <CR> <LF>