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Chapter
1
Helpful
Tip:
When
you
use
your
DCM
212
for
the
first
time or
when
you seem
to
be
getting
garbled
data,
use the
self-test
mode
to
help
you
find the
cause
of
the
problem. Refer
to the section
on
"self-test" in
Appendix
A, Tandy
protocol
reference,
or
in
Appendix
B,
Hayes
protocol
reference.
If
you
plan
to
use
the
DCM
212
in
Tandy
protocol
mode
only,
you
may
skip
Chapter
3
and Appendix
B.
However,
if
you
intend
to
use
it
in
Hayes
protocol
mode
only,
you
may
disregard
Chapter
2
and
appendices
A
and
D. Refer
also to the
operation
manual
which accompanies your
communications
software package.
11
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