4 AT Commands, S-Registers, and Result Codes
53
Command: X
n
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: #X
n
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: Y
n
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.)
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