IR4420 & ER4420/i/p Installation Guide
4
Preface
This guide describes the installation procedure for the IR4420, ER4420, ER4420i and
ER4420p. It is intended to provide sufficient information for you to be able to connect the
unit to your terminal equipment and power supply. A complete reference guide to the
software features that are available on the product is available separately in PDF format
that can be downloaded from the Digi International website (www.digi.com
).
All models feature:
♦ 4 x 10/100Base-T Ethernet ports
♦ 2 x RS232 sync/async serial ports (25-way D)
♦ 2 x USB 2.0 host ports
♦ 2 x SIM card sockets
Several combinations of EDGE/GPRS, ISDN and PSTN connectivity are available
depending on the model.
Note: You will not be able to use the router for remote communication until you have
subscribed to a suitable EDGE network service.
Package Contents
When you receive the router carefully unpack it and check the contents. These should
include:
Model
Item IR4420 ER4420 ER4420i ER4420p
System unit
12V mains adapter
Installation guide
2m CAT5 STP LAN cable (blue)
2m ISDN cable
2m PSTN cable
If any item is missing or damaged, please contact your supplier. You should also make a
record of any damage that may have occurred during shipping and report it to the carrier.
IR4420 & ER4420/i/p Installation Guide
5
1 Introduction
The ER4420 and other models described in this guide are compact IP routers that
facilitate the transmission of data over EDGE and/or ISDN/PSTN networks. All models
incorporate a 4-port 10/100 Ethernet switch. Depending on the model, each unit also
incorporates one or more WAN interfaces as follows:
♦ IR4420 – ISDN BRI only
♦ ER4420 – wireless GPRS/EDGE only
♦ ER4420i – wireless GPRS/EDGE and ISDN BRI
♦ ER4420p – wireless GPRS/EDGE and PSTN
The routers can be configured either by using commands entered at the serial port (much
like a modem), or via the built-in Web interface. We recommend that you use the Web
interface whenever possible.
In addition to many standard LAN and Internet protocols such as PPP, ER series products
provide a combination of powerful but easy to use configuration, management and
diagnostic tools. This makes them simple and cost-effective solutions for migrating existing
terminal or telemetry equipment, which use wired networks (PSTN, ISDN, etc.), to wireless
EDGE operation.
1.1 Front Panel Features
The front panel of the unit incorporates the USB host connectors, a number of LED
indicators depending on the model and the two SIM card-holders as shown in the following
illustration (ER4420i):
USB Host Connectors
The USB host connectors may be used to connect compatible USB client devices such as
memory sticks, serial adapters, etc.
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