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Tandy
protocol
mode
operation
Example
1:
Manual
answer
mode
The phone
rings
and you answer by
picking
up
the
receiver.
After
talking
a
while
to
your
friend,
you
decide
to
exchange information by
computer
(telecommunications) without breaking
voice
call:
1.
Your
friend
selects
to
be
the originating
station,
while
you
are the
answering
station.
You
may
recall
that
automatic
originate
mode
is
a
preset
condition
at initial
power-up, so
you must
set
up
your
Modem
by
entering:
*
,
Wake
up!
M
Select
manual mode.
A
Select
answer mode.
2.
Give your
friend
time
to
set
up
the originate
modem.
3.
Press
(x)
.
The
Modem
transmits a
carrier tone.
The
carrier
is
the
sound you
hear through
the
built-in
speaker or
when you
pick
up
the receiver while the
Modem
is
in
communica-
tions
with
another
modem.
It
sounds
similar
to
running water or
static
during high
speed
operation
and
is
a
steady,
pure
tone dur-
ing
low speed
operation.
4.
The
answer
station
always
issues
the
X
command
first.
After
hear-
ing the
answer
modem's
carrier tone,
the
originate station
sends
the
X
command
to
complete
the
connection
and
the screen
prompts:
CONNECT
1200
(or
CONNECT
in
low
speed mode)
Hang
up
both
handsets.
Be
sure to
keep
quiet
when
the
handset
is
OFF
HOOK
—
noise
picked
up
could cause
errors in
the data being
passed
by
the
modems.
Also,
be
careful
when
you hang up
the telephone
since
slamming
or
dropping
the
phone back on
the
hook
while the
modems
are control-
ling
the
lines
could
disrupt
carrier
long
enough
to
start
a
loss-of-carrier
disconnect sequence.
18
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