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Modem
Registers
Chapter
6
MODEM
REGISTERS
6.1
The
Set
Command
There
are
two
Set
command
forms:
ATSr?<CR>
ATSr=n<CR>
The
first
reveals
the contents
of
the
register
indicated
by
"r."
The
second changes
the contents of "r" to the value specified
by
"n."
These
registers
are
dedicated
memory
locations within
the
1200
bps
internal
modem's memory
space
that control certain
opera-
tions.
Every time
the
modem
is
turned
on
or
reset (with
the
Z
command),
the default values
are
set.
This
means
that
if
changes
are required
to
one
or
more
registers
to
ensure proper
operations,
they
must be
made
each
time the
modem
is
turned
on.
The
following table
lists
the
registers
and
summarizes
their effect
upon
operation.
Register
Range
Unit
Default
50
0-255
rings
1
51
0-255
rings
52
0-127
ASCII
43
Description
Ring
to
answer
on
Number
of
rings
passed
Escape code
character
6-1
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