RLXIC-EH
♦
Intelligent Cellular
Data Communication and Host Modes
RadioLinx Intelligent Cellular Ethernet Gateway for HSUPA (3G GSM) Networks
User Manual
Page 48 of 111
ProSoft Technology, Inc.
May 29, 2009
UDP
and
UDP PAD
: Any data received on the serial port is assembled into
UDP packets, and sent to the session's associated IP address and Port
(described later). Any responses received from the associated IP address
and port destined for the Device Port are unwrapped, and sent out the serial
port.
TCP
and
TCP PAD
: Any data received on the serial port is packaged into
TCP messages, and sent to the associated connection's IP address and Port
(described later). Any data received from the TCP peer is unwrapped and
sent out the serial.
7.1.3 Data
Communication
Public and Private Modes
: The method used by the RLXIC-EH to pass an
IP address to a connected device.
Keepalive
: How the RLXIC-EH maintains its connection to the cellular
network.
7.2 Basic
Modes
7.2.1 AT
Mode
Using a terminal connection, AT commands are used to configure the modem,
command it to do something, or query a setting. For a full listing of the AT
commands, refer to the appendix. AceManager is a graphical user interface for
most AT Commands.
AT commands must always be terminated by
<CR>
(ASCII character 0x0D),
a carriage return (pressing enter on the keyboard). Some may also include a
new line or line feed
<LF>
.
If
E=1
(Echo On), the AT command (including the terminating <carriage
return) will be displayed (output) before any responses.
Two settings affect the format of AT command output:
V
(Verbose), and
Q
(Quiet).
If
Q=1
(Quiet On), no result codes are output whatsoever, so there is no
response generated by a (non query) command.
If
Q=0
(Quiet Off), result codes are output. The format of this output is then
affected by the Verbose setting.
If Quiet mode is off, the result code is affected as follows:
For
V=1
(Verbose mode), the textual result code is surrounded by a carriage
return and new line. Any AT query response is also surrounded by a carriage
return and new line.
For
V=0
(Terse mode), a numeric result code is output with a single trailing
carriage return (no new line is output), while any AT query response is followed
by a carriage return and new line (there is no preceding output).
For example, possible output to the AT command "AT" with carriage return
(assuming quiet mode is not on) is:
carriage return - if V=0
carriage return and new line OK another carriage return and new line - if V=1
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