ProSoft Technology RLXIC-EH User Manual Page 47

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Data Communication and Host Modes RLXIC-EH Intelligent Cellular
User Manual RadioLinx Intelligent Cellular Ethernet Gateway for HSUPA (3G GSM) Networks
ProSoft Technology, Inc. Page 47 of 111
May 29, 2009
7 Data Communication and Host Modes
In This Chapter
Basic Modes..........................................................................................48
Serial Modes .........................................................................................49
Data Communication.............................................................................53
Keepalive...............................................................................................58
Note: This section describes general communication options for the RLXIC-EH. For specific
information regarding configuration of the RLXIC-EH for different industrial applications, refer to the
application notes and templates on the RadioLinx CD.
The RLXIC-EH 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 RLXIC-EH 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 RLXIC-EH to a router. The
router would provide the multiple routing, and the RLXIC-EH would provide one-to-one for the
router to the cellular network and the Internet.
As the host, the RLXIC-EH can use different communication modes:
7.1.1 Basic Modes
AT: The RLXIC-EH accepts and responds to standard AT commands.
PassThru: Direct connection to internal hardware (OEM Module) of the
RLXIC-EH.
Telnet: The RLXIC-EH auto-answers TCP connections to allow terminal
emulation using either a local USB Ethernet connection or remotely using the
cellular connection.
Tip: By default, the RLXIC-EH 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 RLXIC-EH. All serial modes are entered by use of a
startup mode command.
7.1.2 Serial Modes
PPP Mode: The RLXIC-EH uses PPP to communicate with a device or
computer connected to the serial or USB port.
SLIP Mode: The RLXIC-EH uses SLIP to communicate with a device or
computer connected to the serial or USB port.
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