Digi HR4420i User manual

H
HR R4 44 42 20 0/ /i i/ /p p
4000 Series Routers
Wireless GPRS/EDGE/UMTS/HSDPA/HSUPA
router / switch
Installation Guide

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Disclaimer
Digi International makes no representations or warranties with respect to the contents or
use of this manual, any software drivers or associated application software provided with
this product and specifically disclaims any expressed or implied warranties of
merchantability or fitness for any particular purpose.
Digi International reserve the right to modify or revise all or part of this document, its
contents, and any products described herein at any time without prior notification and shall
not be responsible for any loss, cost, or damage, including consequential damage, caused
by reliance on these materials.
Product disposal instructions
The WEEE (Waste Electrical and Electronic Equipment: 2002/96/EC) directive has been
introduced to ensure that electrical/electronic products are recycled using the best
available recovery techniques to minimise the impact on the environment.
This product contains high quality materials and components which can be recycled. At
the end of its life this product MUST NOT be mixed with other commercial waste for
disposal. Check with the terms and conditions of your supplier for disposal information.
Digi International Ltd WEEE Registration number: WEE/HF1515VU
Copyright
© 2009 Digi International. All rights reserved. No part of this document covered by
copyright may be reproduced or copied in any form or by any means graphic, electronic, or
mechanical, including photocopying, recording, taping, or information and retrieval
systems without written permission of Digi International.
May 2009. Part # 6211-0022 Rev B

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Safety Notices
1) Please read all instructions before installing and powering the unit. You should keep
these instructions in a safe place for future reference.
2) The HR4420, HR4420i and HR4420p use a 12V DC/1.5A power supply (mains
adapter). If the mains adapter shows signs of damage or malfunction, you should stop
using it immediately - turn off the power at the mains and disconnect it from the mains
supply before contacting your supplier for a repair or replacement.
3) Changes or modifications not expressly approved by the party responsible for
compliance could void the user‟s authority to operate the equipment. Use only the
accessories, attachments, and power supplies provided by the manufacturer –
connecting non-approved antennas or power supplies may damage the unit, cause
interference or create an electric shock hazard, and will void your warranty.
4) Do not attempt to repair the products; they contain no electronic components that can
be serviced or replaced by the user. Any attempt to service or repair the unit by the
user will void the product warranty.
5) The HR4420, HR4420i and HR4420p are designed for indoor use only and should be
used in an environment that is suitable for computers and other electronic equipment.
6) Ports that are capable of connecting to other apparatus are defined as SELV ports. To
ensure conformity with IEC60950 ensure that these ports are only connected to ports
of the same type on other apparatus.
Note on Wireless Networks
The HR4420 series routers support two categories of wireless networks: GSM networks
and 3G networks. GSM networks support the GPRS and EDGE data transmission
standards whilst 3G networks support 3G (UMTS), HSDPA and HSUPA. Throughout this
manual these networks will be referred to as either GSM or 3G networks, or simply as
„wireless‟ networks.

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Special Notes on Wireless Safety
Digi International products are designed to the highest standards of safety and
international standards compliance for the markets in which they are sold. However,
wireless based products contain radio devices which require specific consideration. Please
take the time to read and understand the following guidance. Digi International assumes
no liability for an end user‟s failure to comply with these precautions.
Wireless routers incorporate a wireless radio module. Users should
ensure that the aerial is positioned at least 1 metre away from
themselves and other persons in normal operation.
When in a hospital or other health care facility, observe the restrictions on
the use of mobile phones. Do not use the router in areas where
guidelines posted in sensitive areas instruct users to switch off mobile
phones. Medical equipment may be sensitive to RF energy.
The operation of cardiac pacemakers, other implanted medical
equipment and hearing aids can be affected by interference from cellular
terminals such as the wireless routers when placed close to the device. If
in doubt about potential danger, contact the physician or the
manufacturer of the device to verify that the equipment is properly
shielded. Pacemaker patients are advised to keep the wireless router
away from the pacemaker while it is on.
Wireless routers must NOT be operated on aircraft. The operation of
wireless appliances in an aircraft is forbidden to prevent interference with
communications systems. Failure to observe these instructions may lead
to the suspension or denial of cellular services to the offender, legal
action, or both.
As with any electrical equipment, you should not operate your wireless
router in the presence of flammable gases, fumes or potentially explosive
atmospheres. Radio devices should not be used anywhere that blasting
operations are taking place.
Wireless routers receive and transmit radio frequency energy while
switched on. Remember that interference can occur if it is used close to
TV sets, radios, computers or inadequately shielded equipment. Follow
any special regulations and always switch off your wireless router
wherever forbidden or when you suspect that it may cause interference
or danger.
SOS IMPORTANT! –Wireless routers operate using radio signals and
cellular networks cannot be guaranteed to connect in all possible
conditions. Therefore, you should never rely solely upon any wireless
device for life critical communications.

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Preface
This guide describes the installation procedure for the HR4420, HR4420i and HR4420p. 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 wireless, 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 wireless network service.
Package Contents
When you receive the router carefully unpack it and check the contents. These should
include:
Model
Item
HR4420
HR4420i
HR4420p
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.

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1 Introduction
The HR4420 and other models described in this guide are compact IP routers that
facilitate the transmission of data over UMTS, HSDPA, HSUPA, GPRS, 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:
HR4420 –wireless GPRS/EDGE/UMTS/HSDPA/HSUPA only
HR4420i –wireless GPRS/EDGE/UMTS/HSDPA/HSUPA and ISDN BRI
HR4420p –wireless GPRS/EDGE/UMTS/HSDPA/HSUPA 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, HR 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
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 (HR4420i):
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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Status Indicators
The status indicators operate as follows:
ON
Illuminates steady red when power is applied.
LAN 0, 1, 2, 3
Illuminate steady when there is a network connection to the
associated LAN port and flash when data is transmitted or
received.
3G/GSM:
NET, SIM,
DAT
These indicators operate as follows:
NET –Illuminates green when a wireless network has been
detected.
SIM –Illuminates green when a valid SIM card is installed in the
unit.
DAT –Flashes green when data is being transmitted or received.
SIGNAL
The three indicators labelled SIGNAL illuminate to indicate the
wireless signal strength as follows:
None illuminated < -113 dBm (effectively no signal)
1 LED illuminated >= -112 dBm and <= -87dBm (weak)
2 LED‟s illuminated >= -86dBm and <= -71dBm (medium)
3 LED‟s illuminated >= -70dBm and <= -51dBm (strong)
ISDN:
D, B1, B2
On the HR4420i, these indicators operate as follows:
D–Illuminates green when the unit is connected to an ISDN
network and the D-channel signalling layer is active.
B1 –Illuminates green when ISDN B-channel 1 is active and
flashes when data is being transmitted/received over this
channel.
B2 –Illuminates green when ISDN B-channel 2 is active and
flashes when data is being transmitted/received over this
channel.
PSTN:
OH, CD, DAT
On the HR4420p, these indicators operate as follows:
OH –Illuminates green when the modem has gone off-hook.
CD –Illuminates green when the unit has connected to a remote
modem and asserted the Carrier Detect signal at the serial port.
DAT –flashes green when the unit has connected to a remote
modem and data is being transferred.

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SERIAL:
0, 1
These indicators operate in one of two software configurable
modes:
Connection Mode: Illuminate steady if a terminal is connected to
the serial port and the DTR signal is on. Flash when data is
transmitted or received.
DTR Mode: Flash when data is transmitted or received only.
SIM Card Sockets
The two sockets at the right side of the front panel are for the GSM SIM card(s) that you
will receive from your service providers. Details of how to insert these correctly are given
in section 2 below.
Rear Panel Features
The functions of these connectors are described in the following table:
12V DC
This jack socket is used to connect the unit to the power supply
using 12V DC mains adapter.
LAN 0, 1, 2, 3
The LAN sockets are used to connect the unit to 10/100-BaseT
LANs using the 2-metre STP (Shielded Twisted Pair) cable
supplied or a suitable alternative. These ports are auto-sensing
for speed and wiring (straight-through or cross-over). To comply
with EMC requirements they should not be used with non-STP
cable.
GSM/3G
ANTENNA
This SMA connector is used to fit the GSM/3G stub aerial
supplied with the unit. A range of alternative antennas are
available for purchase separately.
SERIAL 0, 1
These 25-way D sockets provide synchronous/asynchronous
RS2322 serial ports which may be used to connect the router to
compatible serial devices. The unit is supplied with a suitable 2
metre serial cable. To comply with EMC requirements it should
not be used with a longer cable.
ISDN/PSTN
This socket is used to connect the router to an ISDN or PSTN
line.
Reset Switch
This is located on the underside of the unit near the front. Pressing the switch gently with
the tip of a pen or other suitable implement will generate a hardware reset.

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2 Installation
All of the products described in this guide are designed for indoor use (office or home).
The system unit should be positioned on a smooth, level surface making sure that there is
adequate ventilation. Do not expose it to extremes of heat or cold, strong magnetic fields
or liquids.
It is important to remember that these products are wireless devices just like a mobile
phone, so they will only operate reliably over the wireless network if there is a good signal.
For many applications the stub aerial provided will be suitable but in some circumstances
it may be necessary to use a window-mounted or magnetically mounted aerial with an
extended cable to allow the aerial itself to be positioned to provide the best possible signal
reception. Digi International can supply a range of suitable aerials.
Important: If you are going to be using the Sar/OS Connection Wizard to configure the
unit‟s Ethernet port and also connect it to your GSM/3G network, skip this section and
proceed to Configuration.
Step 1 - Installing the SIM card(s)
The router incorporates two separate SIM card holders so that if your application demands
it, you may install SIM cards for two different networks. This means that one wireless
service may be used as a back-up service in the event that the primary service fails in
some way. By default, SIM 1 is the default SIM used for access to the primary network and
SIM 2 is used for the back-up network.
Note: SIM 1 and SIM 2 cannot be used to access two networks simultaneously.
The SIM card(s) should be inserted into SIM cardholders at the right side of the front panel
as illustrated below.
In both cases, the end of the SIM card with the chamfered corner should be inserted first.
For SIM 1 the contacts should be face down. For SIM 2 the contacts should be face up.

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Step 2 –Fitting the antenna
The router is supplied with a “stub” aerial and an elbow adapter for use with wireless
networks.
There are two options for fitting the antenna:
1) If the unit is to be mounted on a flat surface such as a desktop, you should first screw
the antenna onto the 90elbow adapter supplied. The pair may then be screwed onto
the SMA connector on the rear panel of the router. DO NOT OVERTIGHTEN THE
ANTENNA –IT SHOULD BE FINGER TIGHT ONLY.
2) If you intend to mount the router on a wall (or other vertical surface), using the
mounting bracket, the antenna may be fitted directly to the SMA connector without the
elbow adapter.
Important Note
If the HSUPA option is purchased, 2 antennas will be supplied, both must be attached to
the router. These antennas must not be replaced with external antennas as the spacing
between the two antennas is critical.
Step 3 –Connecting the LAN cable
Plug one end of one of the supplied 2 metre CAT5 cable into the RJ45 socket labelled
LAN 0. Plug the other end into the LAN socket on your PC or notebook.
Step 4 –Connecting the serial cable
For connection to a serial terminal device, connect the 25-way D plug on the serial cable
provided to the SERIAL connector on the rear of the unit. Connect the other end of the
cable (9-way D socket) to the terminal. If the serial connector on the terminal is not a 9-
way D plug, you will need a suitable adapter.
Step 5 –Connecting the power supply
Plug the jack plug on the mains adapter into the socket labelled 12V DC. When power is
first applied, the ON indicator will illuminate and the unit will initiate a series of diagnostic
self-tests. During this process one or more of the other indicators, will flash to show that
the unit is busy. When the flashing stops, the unit is ready to use.
The unit is now ready to be configured.

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3 Configuration
Once the router has been installed and powered up, you must now configure it to
communicate with your network and the Internet. The easiest way to do this is to use the
Sar/OS Connection Wizard, available from the Digi website.. The Sar/OS Connection
Wizard will take you step-by-step through the process of configuring the router.
You can choose to just configure the unit‟s Ethernet port (so that you can connect to it
over your LAN in order to configure it fully), or you can use the wizard to configure the
unit‟s Ethernet port, and at the same time connect it to your wireless network.
Using the wizard means that you will not have to change the IP address of your PC.
Rather, you will be able to change the IP address of the router to match the subnet your
PC is already on.
Note: The default IP address for the LAN 0 port is 192.168.0.99, with a Class C subnet
(255.255.255.0). Setting your PC’s IP address to one on the same subnet (192.168.0.*)
will enable you to connect to the unit’s Web interface. You will then be able to configure
the unit manually.
Step 1 –Install the Connection Wizard
Download the connection wizard from the Digi website and install the software on your PC.
Step 2 –Run the Wizard
Once the wizard has been installed on your PC, run it from the Windows Start menu.
Step 3 –Decide which configuration method to use
Choose to either configure the unit‟s Ethernet port only, or configure the unit‟s Ethernet
port and at the same time connect it to your wireless network.
If you choose to configure the unit‟s Ethernet port only, you must have completed all the
installation steps listed in the previous section.
Step 4 –Configure the unit
Follow the on-screen instructions to configure the unit according to the method you have
chosen. Once complete you will be able to browse to the unit and configure it using your
web browser.

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4 General Specifications
Model numbers
81-HR4420-SSEU-00 (HR4420)
81-HR4420-SSEU-01 (HR4420i)
81-HR4420-SSEU-02 (HR4420p)
Power supply
12V DC / 1.5A
Dimensions
W187 x D137 x H44 mm
Weight
0.76Kg
Operating temp.
range
-20 to +50 degree Celsius
HR4420-
WAN interface
Category 5 2Mb HSUPA
MO 0301: 850 / 1900 / 2100 ( Rx diversity) MHz
MO 0302: 850 (Rx Diversity) / 1900 (Rx Diversity) / 2100 MHz
Equalization and Rx Diversity at the same time
Category 12 (QPSK) 2100 MHz HSDPA (max 1.8Mbps
downlink).
Quad-band GSM 850/900/1800/1900 MHz EDGE (E-GPRS)
multi-slot class 10 (max 236.8 kbps downlink), mobile station
class B, modulation and coding scheme MCS1-9.
HR4420i -
WAN interfaces
As HR4420 plus:
Full duplex 2B+D S/T interface transceiver (according to ITU-
T I.430). LAPB and LAPD support. Non-auto mode,
transparent mode, extended transparent mode.
HR4420p -
WAN interface
As HR4420 plus:
14.4 kbps fax modem. V.92 compliant, backwards compatible
with earlier protocols. V.44 data compression, v.42 LAPM and
MNP 2-4 error correction.
USB ports
Three-port USB 2.0 Full-speed Host (OHCI) (12 Mbits per
second maximum throughput)
Ethernet interface
10/100Base-T auto-sensing, auto-MDI/MDX (RJ45)
Serial interface
Sync/Async RS232 compatible via 25-way D socket

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5 Declaration of Conformity
Declaration of Conformity for R&TTE Directive
We:
Digi International Ltd, Beacon House,
Riverside Business Park, Ilkley, West
Yorkshire, LS29 8JZ, ENGLAND
declare under our sole responsibility that the following product(s):
Models:
HR4420, HR4420i, HR4420p
Part numbers:
81-HR4420-SSEU-00 (HR4420)
81-HR4420-SSEU-01 (HR4420i)
81-HR4420-SSEU-02 (HR4420p)
conform to the relevant harmonised standards:
EN60950-1 A11: 2004
EN301489-07: v1.2.1 (2002-08)
EN55022 1998, EN55024: 1998+A1:2001
EN301511: v9.0.2
following the provisions of Council Directive 1999/5/EC on radio equipment and
telecommunications terminal equipment and the mutual recognition of their conformity.
Name:
D Ellison
Position:
Director
Signature:
Date:
1st May 2009
on behalf of Digi International.