Paradyne 3821Plus Quick Reference Manual page 17

AT COMMANDS
Bold text indicates Async Dial factory defaults.
AT Attention Command Prefix/Autobaud
Rate. Indicates a command string has
started and determines the DTE's data
rate and parity.
A/ Repeat Last Command. Reexecutes last
command string. (Not preceded with AT
or followed by pressing the Return key.)
A Answer Mode. Goes off-hook and
attempts to establish a connection
without waiting for a ring.
B0 ITU-T V.21 or V.22 (300 or 1200 bps)
B1 Bell 103 or 212A (300 or 1200 bps)
D n Dial. Dials the telephone number n with
optional modifiers:
T Tone Dial (DTMF)
P Pulse Dial
, Pause
W Wait for Dial Tone
R Reverse Dial
@ Quiet Answer
! Hook Flash
; Return to Command Mode
DS= n Dial Stored Number. Dials the number
stored in location n (1–10).
En Command Character Echo
E0 Disables echo to the DTE.
E1 Enables echo to the DTE.
H0 Modem goes on-hook.
H1 Modem goes off-hook.
I 0 Displays product code (default 144).
I 1, I 9 Displays 3-digit firmware revision
number.
I 2 Performs an EPROM check.
I
3 Displays modem's serial number.
I 4 Displays modem's model number.
I 5 Displays part number of circuit card.
I
6 Displays firmware release number.
I 10= n Changes value of product code (0=144,
1=240, 2=480, 3=960, 4=120).
I 11 Firmware checksum.
I 19 Displays entire firmware revision number.
Ln Speaker Volume
L0,L1 Selects low volume.
L2 Selects medium volume.
L3 Selects high volume.
O Returns modem to Data mode from
online Command mode.
AT COMMANDS (continued)
Qn Result Codes
Enables result codes. Refer to Result
Q0
Codes section.
Q1 Disables result codes.
Q2 Enables originate modem to send result
codes to the DTE. Required for most
UNIX applications.
S n ? Displays value of S-Register (where n is
the register number).
S n=r Change S-Register. Changes the
contents of the S-Register (where n is the
register number and r is the assigned
value).
Vn Result Code Format
V0 Displays as digits (Numbers 1).
V1 Displays as text.
V2 Displays as digits (Numbers 2).
Xn Extended Result Codes; Dial Tone
Detect; Busy Tone Detect
X0 Disables extended result codes 5–16,
dial tone detect, and busy tone.
X1 Enables extended result codes 5–16,
disables dial tone detect and busy tone
detect.
X2 Enables extended result codes 5–16, dial
tone detect, and disables busy tone
detect.
X3 Enables extended result codes 5–16,
disables dial tone detect and enables
busy tone detect.
X4 Enables extended result codes 5–16,
dial tone detect, and busy tone detect.
See Result Codes in the user's guide.
X5 Adds EC suffix to extended result codes
(20–27) if error control is used, enables
dial tone detect and busy tone detect.
X6 Adds either V.42 or MNP suffix to
extended result codes (20–27) if data
compression is used, enables dial tone
detect, and busy tone detect.
X7 DTE rate appears in CONNECT
message instead of line rate, enables dial
tone detect and busy tone detect.
Yn Long Space Disconnect
Y0 Disable.
Y1 Enable.
Zn Reset and Load Active
Z0 Loads contents of Active (Saved) into
Active (Operating).
Z1 Loads contents of Customer 1 into Active
(Operating).
Z2 Loads contents of Customer 2 into Active
(Operating).
Z3 Loads contents of Active (Saved) into
Active (Operating) and performs a reset.
Z9 Performs a full modem reset.
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