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Command
Summary
Code
XO
XI
X2
X3
X4
OK
*
1
CONNECT
*
2
RING
*
3
NO
CARRIER
*
4
ERROR
4
5
CONNECT
1200
-
6
NO
DIALTONE
7
BUSY
8
NO ANSWER
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
_
*
*
*
Notes:
1)
Most
software written
for
the
"AT"
modem
command
set
does
not accept the
extended
result
codes
(5
through
10),
so
the de-
fault
XO
is
used.
2)
The
NO ANSWER
result
code
is
returned only
when
the
mo-
dem
is
using the
@
command.
See
Section
4.7.
3)
The
BUSY
and
NO
DIALTONE
result
codes
will
be
displayed
after
5
seconds
instead of
after
30 seconds
(default of S7).
5-15
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