Canon Cat Reference Manual page 115

4b.
Serial Port Connected to the
SEND Command
By
connecting
the
serial
port
to the SEND command,
you
can send and receive
text through
the
Cat's
serial
port. This
might
be useful
if
you
are using an external modem or
communicating
directly
over
a
cable to
a
computer.
By connecting
the serial
port
to
the
SEND
command,you
disconnect
the internal
modem
and disable
[PHONE].
When
you
connect the
serial
port
to
the alternate
printer,
[PHONE]
will
be
restored. Also, if you connect an external
modemto
the
Cat'
s
serial
port,youwill
needanull
modem,
a
device or cable
which
interconnects
the
Cat and modem
"talk" qnd "listen"
signals correctly.
The
screen used
to
cohnect the
Cat's
serial
port to
the
SEND command is illustrated below:
←
￨,11薫
Connect
to
Select
SEND Command
if
you want
to
connect an extemal modem
or
another computer
to
the
serial
port.
Select
Alternate Printer
if
you want
to
connect a
serial printer to the
serial
port (see Serial Port
Connected to
Alternate
Printer,
page
108).
Communications
mode
Selects
the way
in which
Cat
signals are sent over the
phone
line. If
you
want to
talk to
another Cat, select
Cat-to-Cat.
If
your Cat is called by
another
Cat, your Cat
will
automatically
set
itself
up to
communicate
correctly.
If
you want to talk to
a
data
service, select
Full-duplex
or
Half-duplex
depending on
what
the data service
requires; your
data service manual
should
tell you which is correct.
If
you're not
sure,
try
Half-duplex. If
each character appears doubled,
switch to
Full-duplex.
Answerback
Select Yes and the Cat
will
send the phrase
Canon Cat
modem
to the serial
port
when
it
receives
a
CONTROL-E
character
from the serial
port.
Select
No
and the Cat
will
isnore
a
CONTROL-E.