AT Command Reference Manual
3-10
1048
Xn - Extended Result Codes
This command selects which subset of the result messages will be used by the modem to inform the DTE of the results of
commands.
Blind dialing is enabled or disabled by country parameters. If the user wishes to enforce dial tone detection, a "W" can be
placed in the dial string (see D command). Note that the information below is based upon the default implementation of the X
results table. Table 3-1 indicates the messages which are enabled for each X value.
If the modem is in facsimile mode (+FCLASS=1 or 2), the only message sent to indicate a connection is CONNECT without
a speed indication.
X0
Disables monitoring of busy tones unless forced otherwise by country requirements; send only
OK, CONNECT, RING, NO CARRIER, ERROR, and NO ANSWER result codes. Blind dialing is
enabled/disabled by country parameters. If busy tone detection is enforced and busy tone is
detected, NO CARRIER will be reported. If dial tone detection is enforced or selected and dial
tone is not detected, NO CARRIER will be reported instead of NO DIAL TONE. The value 000b is
written to S22 bits 6, 5, and 4, respectively.
X1
Disables monitoring of busy tones unless forced otherwise by country requirements; send only
OK, CONNECT, RING, NO CARRIER, ERROR, NO ANSWER, and CONNECT XXXX (XXXX =
rate). Blind dialing enabled/disabled by country parameters. If busy tone detection is enforced and
busy tone is detected, NO CARRIER will be reported instead of BUSY. If dial tone detection is
enforced or selected and dial tone is not detected, NO CARRIER will be reported instead of NO
DIAL TONE. The value 100b is written to S22 bits 6, 5, and 4, respectively.
X2
Disables monitoring of busy tones unless forced otherwise by country requirements; send only
OK, CONNECT, RING, NO CARRIER, ERROR, NO DIALTONE, NO ANSWER, and CONNECT
XXXX. If busy tone detection is enforced and busy tone is detected, NO CARRIER will be
reported instead of BUSY. If dial tone detection is enforced or selected and dial tone is not
detected, NO DIAL TONE will be reported instead of NO CARRIER. The value 101b is written to
S22 bits 6, 5, and 4, respectively.
X3
Enables monitoring of busy tones; send only OK, CONNECT, RING, NO CARRIER, ERROR, NO
ANSWER, and CONNECT XXXX. Blind dialing is enabled/disabled by country parameters. If dial
tone detection is enforced and dial tone is not detected, NO CARRIER will be reported. The value
110b is written to S22 bits 6, 5, and 4, respectively.
X4
Enables monitoring of busy tones; send all messages. The value 111b is written to S22 bits 6, 5,
and 4, respectively. (Default.)
Result Codes:
OK
n = 0 to 4.
ERROR
Otherwise.
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