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Modemulator User Guide
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Chapter 1: Features
Introduction
The USRobotics Courier Modemulator allows a legacy M2M system to be conveniently converted to cellular
without upgrading or replacing application software. The Modemulator accepts and responds to analog
modem commands and sends result codes that mimic a PSTN connection, which allows drop-in
compatibility with legacy application software.
Overview of Main Features
The following features and capabilities assure an easy transition from dial-up to cellular M2M.
Cellular Gateway Engine
The Modemulator is embedded into a full-featured cellular gateway, and connects to cellular networks
using the gateway resources.
Operating Modes
The Modemulator operates in two distinct modes, which are selected by a MODE switch on the front of the
device.
Modemulator mode
Gateway mode
Modemulator Mode
In Modemulator mode, the Modemulator’s command line user interface emulates the behavior of a serial
dial-up modem connecting over the PSTN.
Modem AT command set
Originate or answer calls
PSTN response codes
Translate up to 7200 phone numbers into IP addresses
Cellular Gateway Mode
When in cellular gateway mode, the Modemulator configures the base unit to operate as a full-featured
cellular gateway. Some of the key gateway features are:
Interoperability with most cellular networks
GPS receiver
One 10/100 Mbps RJ45 Ethernet port
One DB9 RS-232 DCE serial port
IPsec VPN
Firewall
Graphical User Interface