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Modemulator User Guide
Page
24
of
113
Chapter 3: Applications
This chapter summarizes how to:
Convert a legacy dial-up M2M system to cellular
Maintain compatibility with dial-up modems
For detailed configuration and advanced operating features see the
section in this guide, and see the
USR3520/USR803520 Gateway User Guide
Convert A Legacy Dial-up M2M System To Cellular
Properly configured Modemulators are drop-in cellular replacements for dial-up PSTN modems, which
extends the useful life of legacy M2M software and hardware, while providing the benefits of a transition
from the PSTN to the cellular network.
Modemulators normally operate in a peer-to-peer fashion, with a Modemulator on both ends of a
connection. Alternatively, the Modemulator can operate in single-ended mode for a system that has
remote
Modemulators connecting directly with a TCP/IP server. Both types of systems are described
below.
Peer-to-Peer Operation
chapter in this guide to verify that two Modemulators are operating
properly.
System Architecture
A legacy M2M
host
site (Headquarters, Operations Center, etc.) is the source of data being transferred to
all of the
remote
sites, or is the destination of data being transferred from all of the
remote
sites. This
host
site has application hardware and software that normally interfaces with a serial dial-up modem used
to transfer the data.
The legacy M2M
remote
sites are the sources of data being transferred to a
host
site, or are the
destinations of data being transferred from a
host
site. Each
remote
site has application hardware and
software that normally interfaces with a serial dial-up modem used to transfer the data.
The Terminal port of the Modemulator at the
host
site connects to a serial port of the
host
application
hardware that would normally connect to a serial dial-up modem, and the Terminal port of the
Modemulator at each
remote
site connects to a serial port of the
remote
application hardware that would
normally connect to a serial dial-up modem.
An RF survey of the host and remote sites may be necessary to determine if the installations are
in range of cellular reception from the operator chosen to provide service. Consult a professional
cellular installer for assistance.