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Chapter
4
Note
also that
the
default
setting
of the
X
command
does
NOT
tell
the
modem
to
wait
for dial
tone.
See
the
X
command,
Section
5.18.
Wait
for
quiet
answer
before
dialing,
Example:
ATDT
5555555
@
12345
<CR>
Meaning:
Dial
the
number,
and,
after
the
phone
rings at least
once,
wait
for 5
seconds
of
silence.
When
5
seconds
of
silence
are de-
tected,
dial
the
rest
of the
number.
If
the
1200 bps
internal
modem
does not
detect
5
seconds
of
silence,
the
modem
will
return
a
result
of
NO ANSWER
and hang
up.
If
it
de-
tects
a busy
signal
the
modem
will
return the
BUSY
result
code.
Note: This
command
tells
the
modem
to wait
for
one
or
more
rings
followed
by
5
seconds
of
silence
before continuing the
command
string.
The
length of
time
the
modem
waits
is
speci-
fied in register
S7.
The
factory default
time
of
S7
is
30
seconds.
The
BUSY
result
code
will
be
displayed
after 5
seconds
if
a
busy
signal
is
detected.
This
command
is
used
to
access a
system
that
does not have
a
dial
tone.
4-12
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