Chapter 3 – AT Commands, S-Registers, and Results Codes
Multi-Tech Systems, Inc. MT2834ZDX User's Guide 16
Command: &Wn Store Configuration
Values: n = 0 or 1
Default: 1
Description: &W0 Store current settings in NVRAM; load them at power-on or following the ATZ command
instead of loading the factory defaults from ROM.
W1 Clear user default settings from NVRAM.
Command: Xn Result Codes and Call Progress Selection
Values: n = 0–4
Default: 0
Description: X0 Basic result codes ( CONNECT only); does not look for dial tone or busy signal.
X1 Extended result codes ( CONNECT 28800, CONNECT 33600, etc.); does not look for dial tone
or busy signal.
X2 Extended result codes with NO DIALTONE; does not look for busy signal.
X3 Extended result codes with BUSY; does not look for dial tone.
X4 Extended result codes with NO DIALTONE and BUSY.
Command: #Xn Number of XOFF Characters Sent
Values: n = 0 or 1
Default: 0
Description: #X0 Single XOFF character sent after buffer is full.
#X1 Multiple XOFF characters sent (one for every character received after buffer is full).
Command: Yn Long Space Disconnect
Values: n = 0 or 1
Default: 0
Description: Y0 Disable sending or responding to long space break signal on disconnect.
Y1 Enable sending or responding to long space break signal on disconnect. (Both modems must
have Y1 set.)
Command: Z Modem Reset
Values: n/a
Description: Reset modem to default values. Defaults come from user NVRAM if &W0 is set, from factory ROM
if &W1 is set.
Command: , Dialing Pause
Values: n/a
Description: Placed in dialing command, comma causes dialing pause for time set by S8.
Command: : Continuous Redial
Values: n/a
Description: Placed at end of dial command, a colon causes continuous redial of a number (10 in DOC
modems) until answered. Not used in ZDXK or ZDXI modems.
Command: ; Return to Command Mode
Values: n/a
Description: Placed at end of dial command, a semicolon causes an immediate return to command mode after
dialing.
Command: ! Flash On-Hook
Values: n/a
Description: Placed in dial command, exclamation point causes modem to flash on-hook.
Command: @ Quiet Answer
Values: n/a
Description: Placed in dial command, @ causes modem to wait for a ringback, then 5 seconds of silence, before
processing next part of command.
Command: $ Call Card Tone Detect
Values: n/a
Description: Placed in dial command, causes modem to wait for a call card tone before processing next part of
command (such as a call card number).