
AT Initialization Commands for the ARN
117353-B Rev. 00
E-3
=v Set default S-Register to value v.
? Return the value of default S-Register.
T Force DTMF dialing.
V0 Report short form (terse) result codes.
V1 Report long form (verbose) result codes.
W0 Report DTE speed in EC mode.
W1 Report line speed, EC protocol, and DTE speed.
W2 Report DCE speed in EC mode.
X0 Report basic call progress result codes. For example, OK,
CONNECT, RING, NO CARRIER (also, for busy, if enabled, and dial
tone not detected), NO ANSWER, and ERROR.
X1 Report basic call progress result codes and connection speeds. For
example, OK, CONNECT, RING, NO CARRIER (also, for busy, if
enabled, and dial tone not detected), NO ANSWER,
CONNECT XXXX, and ERROR.
X2 Report basic call progress result codes and connection speeds. For
example, OK, CONNECT, RING, NO CARRIER (also, for busy, if
enabled, and dial tone not detected), NO ANSWER,
CONNECT XXXX, and ERROR.
X3 Report basic call progress result codes and connection rate. For
example, OK, CONNECT, RING, NO CARRIER, NO ANSWER,
CONNECT XXXX, and ERROR.
X4 Report all call progress result codes and connection rate. For
example, OK, CONNECT, RING, NO CARRIER, NO ANSWER,
CONNECT XXXX, BUSY, NO DIAL TONE, and ERROR.
Y0 Disable long space disconnect before on-hook.
Y1 Enable long space disconnect before on-hook.
Z0 Restore stored profile 0 after warm reset.
Z1 Restore stored profile 1 after warm reset.
&C0 Force RLSD active regardless of the carrier state.
&C1 Allow RLSD to follow the carrier state.
&D0 Interpret DTR ON-to-OFF transition per &Qn:.
&Q0, &Q5, &Q6 The modem ignores DTR.
(continued)
Table E-1. Summary of AT Modem Initialization Commands
(continued)
Command Function
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