4000 & 5000 Series User’s Guide
Section 2: Product Overview
2.1 Introduction
The BlueTree 4000 & 5000 series modems are rugged cellular modems built to provide simple
and reliable communication over a CDMA cellular data network. They are typically used in
applications such as Public Safety, Field Force Automation, Asset Tracking, Telemetry, SCADA,
meter reading and WAN backup.
The modem manages two connections at the same time, thus acting as a gateway/router:
•
Cellular WAN connection:
this is the Wide Area Network connection to the cellular
network/Internet. The modem can be configured to automatically and autonomously
establish a packet data connection to the cellular carrier and acquire a WAN IP
address.
•
LAN connection:
this is the local connection between the modem and any device
attached to its serial/Ethernet/USB ports. In the case of Ethernet and USB, the modem
acts as a server and assigns a private LAN IP address to the attached device.
Alternatively, it can perform IP pass-through and assign the WAN IP to the attached
host, thus becoming a fully transparent actor in the communication process.
The modem then routes packets back and forth between its WAN and LAN connections, thus
allowing the locally attached device to communicate with remote computers.
Revision 1.5
Copyright © 2007 BlueTree Wireless Data Inc. Page 7 of 67
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