CDM-800 Gateway Router
Revision 1
Serial-based Remote Product Management
MN-CDM800
6–3
When
the
user
‐
supplied
terminal
emulator
program
is
configured
correctly,
upon
power
‐
up
of
the
CDM
‐
800,
the
CLI
Info
Screen
appears,
followed
by
the
CLI
command
prompt
CDM
‐
800>
.
From
here,
type
“
help[cr]”
or
“
?[cr]”
(without
the
quotes)
to
display
the
CDM
‐
800
available
commands
and
queries,
and
to
review
instructions
for
using
the
interface.
6.2
Remote Commands and Queries Overview
6.2.1
Basic Protocol
In
an
EIA
‐
232
configuration,
the
Controller
device
is
connected
directly
to
the
Target
device
via
a
two
wire
‐
plus
‐
ground
connection.
All
data
is
transmitted
in
framed
packets
as
asynchronous
serial
characters,
suitable
for
transmission
and
reception
to
the
Controller
using
a
universal
asynchronous
receiver/transmitter
(UART).
Controller
‐
to
‐
Target
data
is
carried
via
EIA
‐
232
electrical
levels
on
one
conductor,
and
Target
‐
to
‐
Controller
data
is
carried
in
the
other
direction
on
the
other
conductor:
•
Controller
‐
to
‐
Target:
The
Controller
device
(e.g.,
the
user
PC/CLI)
is
used
to
transmit
instructions
(commands)
to
–
or
to
request
information
from
(queries)
–
the
Target
device
(i.e.,
the
CDM
‐
800).
•
Target
‐
to
‐
Controller:
The
Target,
in
return,
only
transmits
response
information
to
the
Controller
when
specifically
directed
by
the
Controller.
For
Serial
Remote
Control,
all
issued
commands
(
Controller
‐
to
‐
Target
)
require
a
response
(
Target
‐
to
‐
Controller
).
This
response
is
either
to
return
data
that
has
been
queried
by
the
Controller,
or
to
confirm
the
Target’s
receipt
of
a
command
to
change
the
Target’s
configuration.
6.2.2
Packet Structure
The
exchange
of
information
is
transmitted,
Controller
‐
to
‐
Target
and
Target
‐
to
‐
Controller,
in
packets.
Each
packet
contains
a
finite
number
of
bytes
consisting
of
printable
ASCII
characters,
excluding
ASCII
code
127
(DELETE).
In
this
context,
the
Carriage
Return
and
Line
Feed
characters
are
considered
printable.
With
one
exception,
all
messages
from
Controller
‐
to
‐
Target
require
a
response
–
this
will
be
either
to
return
data
that
has
been
requested
by
the
Controller,
or
to
acknowledge
reception
of
an
instruction
to
change
the
configuration
of
the
Target.
Summary of Contents for CDM-800
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Page 20: ...CDM 800 Gateway Router Revision 1 Preface MN CDM800 xviii Notes...
Page 30: ...CDM 800 Gateway Router Revision 1 Introduction MN CDM800 1 10 Notes...
Page 36: ...CDM 800 Gateway Router Revision 1 Installation MN CDM800 2 6 Notes...
Page 120: ...CDM 800 Gateway Router Revision 1 Serial based Remote Product Management MN CDM800 6 12 Notes...
Page 130: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...
