Kantronics KPC-2 - Dumb Modem Mode Operation

Cannot
Transmit
on
Any
Port
1.
Check
the
8BITCONV
command.
Many
dumb
terminals,
and
some
Commodore
programs,
will
not
operate
properly
with
this
command
turned
ON.
The
symptoms
most
common
for
this
problem
are
that
everything
seems
to
work
fine
in
Command
wl
Mode,
but
upon
entering
Convers
Mode,
the
TNC
no
longer
seems
to
operate
at
all.
Usually
you
cannot
return
to
Command
Mode
with
a
Ctrl-C,
pressing
return
does
not
send
a
packet,
and
it
just
seems
like
the
serial
cable
between
your
computer
and
TNC
has
been
unplugged.
2.
Check
your
PARITY
setting
in
the
computer
and
in
the
TNC.
These
must
match
or
else
the
computer
may
not
really
be
sending
the
SENDPAC
character
($0D)
to
the
TNC.
Cannot
Return
to
Command
Mode
1.
The
single
most
common
cause
of
this
is
that
the
STOP
character
(and
usually
XOFF)
have
been
inadvertently
set
to
the
same
as
the
COMMAND
character.
This
is
usually
caused
by
the
use
of
the
dollar
sign
($)
as
a
streamswitch.
If
you
use
the
$,
be
aware
that
you
cannot
enter
hex
values
without
PASSing
the
dollar
sign.
Symptoms
for
this
usually
are
that
you
can
talk
to
the
TNC
fine
in
Command
Mode,
you
can
usually
talk
to
others
on
the
air,
but
you
just
can't
get
back
to
Command
Mode.
(In
non-packet
modes,
you
will
find
that
you
cannot
enter
any
of
the
special
Ctrl-C
directives
either!)
With
most
PC
terminal
programs,
pressing
Ctrl-C
will
display
the
heart
character,
but
you
still
don't
get
the
cmd:
prompt.
Kanterm
Program
Problems
1.
The
most
common
problems
reported
with
the
Kanterm
program
result
from
not
performing
the
Set
Parameters
option
from
within
the
program.
This
usually
occurs
—
after
upgrading
your
INC
to
a
new
version
of
the
Kantronics
firmware.
The
cause
for
this
is
the
need
to
do
a
Hard
Reset
after
installing
the
new
firmware,
and
as
a
result,
the
TNC
and
your
Kanterm
program
are
no
longer
"in
sync"
with
each
other.
2.
Commodore
users
will
normally
experience
this
problem
when
first
setting
the
TNC
up
with
their
Kanterm
software.
All
lower
case
characters
are
hidden,
only
numbers
and
punctuation
appear.
Typically,
this
means
that
when
you
first
enter
your
callsign,
only
the
number
appears.
In
reality,
the
TNC
did
receive
the
proper
callsign,
and
you
can
correct
your
display
by
choosing
the
Set
Parameters
option
from
the
Miscellaneous
Menu.
TNC
Won't
Transmit
on
HF
-
VHF
is
OK
This
problem
usually
is
a
result
of
attempting
to
switch
from
one
port
to
the
other
by
using
the
PORT
command.
The
PORT
command
only
determines
which
port
will
be
the
default
when
the
TNC
is
first
turned
on,
or
after
a
reset.
In
order
to
switch
from
one
port
to
the
other
for
transmitting
data,
you
must
use
the
STREAMSW
characters
as
described
in
Multi-Connects
in
the
Packet
section
of
the
Operations
Manual.
425
iN
CASE
DF
DIFFICULTY.
v
ET
Version
2.85
©
Copyright
1989,
Kantronics,
Inc.
All
Rights
Reserved.
ersion
2.
Duplication
of
this
manual
or
the
firmware
without
Installation
Manual
permission
of
Kantronics,
Inc.
is
prohibited.