Rev 3.0B Feb.08
46
6
6: Data Communication and Host
Modes
•
Basic Modes
•
Serial Modes
•
Data Communication
The
Raven
plays
the
part
of
a
HOST
when
a
computer
or
another
device
is
connected
directly
to
its
port
and
routes
data
to/from
the
connected
device
to
the
cellular
network.
Caution: The Raven moves data from one port to the cellular
network in a simple one-to-one routing. It does not employ a routing
table or any complicated routing protocol.
Tip: If you need to have one-to-many routing, you can connect the
Raven to a router. The router would provide the multiple routing and
the Raven would provide one-to-one for the router to the cellular
network and the Internet.
As
the
host,
the
Raven
can
use
different
communication
modes:
Basic Modes
•
AT
:
The
Raven
accepts
and
responds
to
standard
AT
commands.
•
PassThru
:
Direct
connection
to
internal
hardware
(OEM
Module)
of
the
Raven.
•
Telnet
:
The
Raven
auto
‐
answers
TCP
connections
to
allow
terminal
emulation
using
remotely
using
the
cellular
connection.
Tip: By default, the Raven is in AT Mode and allows AT Commands
to be entered via terminal connection (through the local port
connection) or remotely (through the cellular network). PassThru
Mode can only be exited by resetting the Raven. All serial modes are
entered by use of a startup mode command.
Serial Modes
•
PPP
Mode
:
The
Raven
uses
PPP
to
communicate
with
a
device
or
computer
connected
to
the
serial.
•
SLIP
Mode
:
The
Raven
uses
SLIP
to
communicate
with
a
device
or
computer
connected
to
the
serial.
