Microhard Systems IPN3G User manual

IPn3G
3G Cellular Ethernet/Serial/USB Gateway
Operating Manual
Revision 2.61 - July 2012
150 Country Hills Landing N.W.
Calgary, AB, Canada T3K 5P3
Phone: [phone]
Fax: [phone]
www.microhardcorp.com

© Microhard Systems Inc. 2
Important User Information
Warranty
Microhard Systems Inc. warrants that each product will be free of defects in material and workmanship for a period of one (1)
year for its products. The warranty commences on the date the product is shipped by Microhard Systems Inc. Microhard Systems
Inc.’s sole liability and responsibility under this warranty is to repair or replace any product which is returned to it by the Buyer
and which Microhard Systems Inc. determines does not conform to the warranty. Product returned to Microhard Systems Inc. for
warranty service will be shipped to Microhard Systems Inc. at Buyer’s expense and will be returned to Buyer at Microhard Sys-
tems Inc.’s expense. In no event shall Microhard Systems Inc. be responsible under this warranty for any defect which is caused
by negligence, misuse or mistreatment of a product or for any unit which has been altered or modified in any way. The warranty
of replacement shall terminate with the warranty of the product.
Warranty Disclaims
Microhard Systems Inc. makes no warranties of any nature of kind, expressed or implied, with respect to the hardware, software,
and/or products and hereby disclaims any and all such warranties, including but not limited to warranty of non-infringement,
implied warranties of merchantability for a particular purpose, any interruption or loss of the hardware, software, and/or product,
any delay in providing the hardware, software, and/or product or correcting any defect in the hardware, software, and/or product,
or any other warranty. The Purchaser represents and warrants that Microhard Systems Inc. has not made any such warranties to
the Purchaser or its agents MICROHARD SYSTEMS INC. EXPRESS WARRANTY TO BUYER CONSTITUTES MICRO-
HARD SYSTEMS INC. SOLE LIABILITY AND THE BUYER’S SOLE REMEDIES. EXCEPT AS THUS PROVIDED, MI-
CROHARD SYSTEMS INC. DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PROMISE.
MICROHARD SYSTEMS INC. PRODUCTS ARE NOT DESIGNED OR INTENDED TO BE USED IN
ANY LIFE SUPPORT RELATED DEVICE OR SYSTEM RELATED FUNCTIONS NOR AS PART OF
ANY OTHER CRITICAL SYSTEM AND ARE GRANTED NO FUNCTIONAL WARRANTY.
Indemnification
The Purchaser shall indemnify Microhard Systems Inc. and its respective directors, officers, employees, successors and assigns
including any subsidiaries, related corporations, or affiliates, shall be released and discharged from any and all manner of action,
causes of action, liability, losses, damages, suits, dues, sums of money, expenses (including legal fees), general damages, special
damages, including without limitation, claims for personal injuries, death or property damage related to the products sold here-
under, costs and demands of every and any kind and nature whatsoever at law.
IN NO EVENT WILL MICROHARD SYSTEMS INC. BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL,
INCIDENTAL, BUSINESS INTERRUPTION, CATASTROPHIC, PUNITIVE OR OTHER DAMAGES WHICH MAY BE
CLAIMED TO ARISE IN CONNECTION WITH THE HARDWARE, REGARDLESS OF THE LEGAL THEORY BEHIND
SUCH CLAIMS, WHETHER IN TORT, CONTRACT OR UNDER ANY APPLICABLE STATUTORY OR REGULATORY
LAWS, RULES, REGULATIONS, EXECUTIVE OR ADMINISTRATIVE ORDERS OR DECLARATIONS OR OTHER-
WISE, EVEN IF MICROHARD SYSTEMS INC. HAS BEEN ADVISED OR OTHERWISE HAS KNOWLEDGE OF THE
POSSIBILITY OF SUCH DAMAGES AND TAKES NO ACTION TO PREVENT OR MINIMIZE SUCH DAMAGES. IN THE
EVENT THAT REGARDLESS OF THE WARRANTY DISCLAIMERS AND HOLD HARMLESS PROVISIONS INCLUDED
ABOVE MICROHARD SYSTEMS INC. IS SOMEHOW HELD LIABLE OR RESPONSIBLE FOR ANY DAMAGE OR IN-
JURY, MICROHARD SYSTEMS INC.'S LIABILITY FOR ANYDAMAGES SHALL NOT EXCEED THE PROFIT REAL-
IZED BY MICROHARD SYSTEMS INC. ON THE SALE OR PROVISION OF THE HARDWARE TO THE CUSTOMER.
Proprietary Rights
The Buyer hereby acknowledges that Microhard Systems Inc. has a proprietary interest and intellectual property rights in the
Hardware, Software and/or Products. The Purchaser shall not (i) remove any copyright, trade secret, trademark or other evidence
of Microhard Systems Inc.’s ownership or proprietary interest or confidentiality other proprietary notices contained on, or in, the
Hardware, Software or Products, (ii) reproduce or modify any Hardware, Software or Products or make any copies thereof, (iii)
reverse assemble, reverse engineer or decompile any Software or copy thereof in whole or in part, (iv) sell, transfer or otherwise
make available to others the Hardware, Software, or Products or documentation thereof or any copy thereof, except in accordance
with this Agreement.

© Microhard Systems Inc. 3
Important User Information (continued)
About This Manual
It is assumed that users of the products described herein have either system integration or
design experience, as well as an understanding of the fundamentals of radio communications.
Throughout this manual you will encounter not only illustrations (that further elaborate on the
accompanying text), but also several symbols which you should be attentive to:
Caution or Warning
Usually advises against some action which could result in undesired or
detrimental consequences.
Point to Remember
Highlights a key feature, point, or step which is noteworthy. Keeping
these in mind will simplify or enhance device usage.
Tip
An idea or suggestion to improve efficiency or enhance usefulness.
Information
Information regarding a particular technology or concept.

© Microhard Systems Inc. 4
Important User Information (continued)
Please Note: These are only sample labels; different products contain different identifiers. The actual
identifiers should be seen on your devices if applicable.
Regulatory Requirements / Exigences Réglementaires
To satisfy FCC RF exposure requirements for mobile transmitting devices, a separation distance of 23cm or
more should be maintained between the antenna of this device and persons during device operation. To
ensure compliance, operations at closer than this distance is not recommended. The antenna being used for
this transmitter must not be co-located in conjunction with any other antenna or transmitter.
WARNING
MAXIMUM EIRP
FCC Regulations allow up to 36dBm Effective Isotropic Radiated Power (EIRP). Therefore, the sum of the
transmitted power (in dBm), the cabling loss and the antenna gain cannot exceed 36dBm.
WARNING
EQUIPMENT LABELING / ÉTIQUETAGE DE L'ÉQUIPEMENT
This device has been modularly approved. The manufacturer, product name, and FCC and Industry Canada
identifiers of this product must appear on the outside label of the end-user equipment.
WARNING
FCCID: RI7T56KL1
IC: 5131A-KL1
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference,
and (2) this device must accept any interference
received including interference that may cause
undesired operation.
SAMPLE LABEL REQUIREMENT/EXIGENCE D'ÉTIQUETTE :
IPn3G
Version 2 Version 1
FCCID: IHDT56KL1
IC: 109O-KL1
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference,
and (2) this device must accept any interference
received including interference that may cause
undesired operation.
Pour satisfaire aux exigences de la FCC d'exposition RF pour les appareils mobiles de transmission, une
distance de séparation de 23cm ou plus doit être maintenue entre l'antenne de cet appareil et les personnes
au cours de fonctionnement du dispositif. Pour assurer le respect, les opérations de plus près que cette
distance n'est pas recommandée. L'antenne utilisée pour ce transmetteur ne doit pas être co-localisés en
conjonction avec toute autre antenne ou transmetteur.
Réglementation de la FCC permettra à 36dBm Puissance isotrope rayonnée équivalente (EIRP). Par
conséquent, la somme de la puissance transmise (en dBm), la perte de câblage et le gain d'antenne ne peut
pas dépasser 36dBm.
Ce dispositif a été approuvé de façon modulaire. Le fabricant, le nom du produit, et la FCC et de l'Industrie du
Canada identifiants de ce produit doit figurer sur l'étiquette à l'extérieur de l'équipement de l'utilisateur final.
S'il vous plaît noter: Ce sont des exemples d'étiquettes seulement; différents produits contiennent des
identifiants différents. Les identifiants réels devrait être vu sur vos périphériques le cas échéant.

© Microhard Systems Inc. 5
Revision History
Revision Description Initials Date
1.0 Initial Release PEH July 2010
1.1 Updated drawings (SMA), screen shots, pictures PEH Sept 2010
1.2 Updated drawings (Diversity, GPS) PEH Sept 2010
1.3 Updated graphics, drawings to reflect new enclosure design PEH Oct 2010
1.4 Update to Quick Start & WebUI menu changes PEH Jan 2011
1.5 Updates to screen shots as required PEH Feb 2011
1.6 Added GPS specs and antenna info PEH Feb 2011
1.7 NTP moved to system configuration, timezone added, phone number added
to stats page, ICMP description updated (v1.1.6-r026)
PEH Apr 2011
1.8 Updated VPN IPSec, GPS, Firewall, Misc Updates (v1.1.8-r1032h PEH June 2011
2.0 New menu format, Added AT Commands, UDP Reporting (v1.1.10-r1036) PEH Sept 2011
2.1 Added AT Command Syntax for each command, Added SMS At Commands PEH Feb 2012
2.2 Updated to reflect changes in v1.2.2-r1045. SMS, SMS Alerts, GRE, Added
info on SNMP MIB, Backup/Restore, System conf etc
PEH Feb 2012
2.3 Updated FCC & IC ID’s, Misc Screen Shots, Formatting PEH Feb 2012
2.4 Updated SNMP MIB PEH Feb 2012
2.41 Removed references to Appendix D in Regulatory Info. PEH Mar 2012
2.5 Added Digital I/O, COM Logging, Event NMS Support, Management, Sched-
uled Reboots, SMS, PPP, Email Updates, Screen Shots etc. v1.2.4-r1058
PEH June 2012
2.6 Added System > History (RSSI, EC/NO, Temp, VDC logs), Sytem Reboot
History, Network > Ethernet Port Status. V2.0.0-r2002b
PEH June 2012
2.61 Fixed links in TOC PEH July 2012

© Microhard Systems Inc. 6
CSA Class 1 Division 2 Option
CSA Class 1 Division 2 is Available Only on Specifically Marked Units
If marked this for Class 1 Division 2 –then this product is available for use in Class 1, Division
2, in the indicated Groups on the product.
In such a case the following must be met:
The transceiver is not acceptable as a stand-alone unit for use in hazardous locations. The
transceiver must be mounted within a separate enclosure, which is suitable for the intended
application. Mounting the units within an approved enclosure that is certified for hazardous
locations, or is installed within guidelines in accordance with CSA rules and local electrical
and fire code, will ensure a safe and compliant installation.
The antenna feed line; DC power cable and interface cable must be routed through conduit in
accordance with the National Electrical Code.
Do not connect or disconnect equipment unless power has been switched off or the area is
known to be non-hazardous.
Installation, operation and maintenance of the transceiver should be in accordance with the
transceiver’s installation manual, and the National Electrical Code.
Tampering or replacement with non-factory components may adversely affect the safe use of
the transceiver in hazardous locations, and may void the approval.
The wall adapters supplied with your transceivers are NOT Class 1 Division 2 approved, and
therefore, power must be supplied to the units using the screw-type or locking type
connectors supplied from Microhard Systems Inc. and a Class 1 Division 2 power source
within your panel.
If you are unsure as to the specific wiring and installation guidelines for Class 1 Division 2
codes, contact CSA International.

© Microhard Systems Inc. 7
Table of Contents
1.0 Overview 9
1.1 Performance Features.................................................................................................................9
1.2 Specifications.............................................................................................................................10
2.0 Quick Start 12
2.1 Installing the SIM Card .............................................................................................................12
2.2 Getting Started .........................................................................................................................12
3.0 Hardware Features 16
3.1 IPn3G Hardware........................................................................................................................16
3.1.1 IPn3G Mechanical Drawings..........................................................................................17
3.1.2 Connectors & Indicators.................................................................................................18
3.1.2.1 Front ................................................................................................................18
3.1.2.2 Rear.................................................................................................................19
4.0 WebUI Configuration 20
4.1 Logon Window...........................................................................................................................21
4.2 System.......................................................................................................................................22
4.2.1 Summary........................................................................................................................22
4.2.2 Config.............................................................................................................................23
4.2.3 Location..........................................................................................................................25
4.2.4 History............................................................................................................................26
4.3 Network......................................................................................................................................27
4.3.1 Summary........................................................................................................................27
4.3.2 Statistics.........................................................................................................................28
4.3.3 Graph .............................................................................................................................29
4.3.4 Config.............................................................................................................................30
4.3.5 SNMP.............................................................................................................................32
4.3.6 DHCP Lease ..................................................................................................................35
4.4 Carrier .......................................................................................................................................36
4.4.1 Statistics.........................................................................................................................36
4.4.2 Graph .............................................................................................................................37
4.4.3 Config.............................................................................................................................38
4.5 COM1 / COM2 Configuration ....................................................................................................44
4.5.1 Statistics.........................................................................................................................44
4.5.2 Config.............................................................................................................................45
4.6 USB Configuration.....................................................................................................................55
4.6.1 Statistics.........................................................................................................................55
4.6.2 Config.............................................................................................................................56
4.7 Security......................................................................................................................................59
4.7.1 Password........................................................................................................................59
4.7.2 Discovery........................................................................................................................60
4.7.3 Access............................................................................................................................60
4.7.4 Authentication.................................................................................................................61
4.8 Firewall ......................................................................................................................................63
4.8.1 Rules..............................................................................................................................64
4.8.2 Port Forwarding / DMZ...................................................................................................66
4.8.3 MAC List.........................................................................................................................68
4.8.4 IP List .............................................................................................................................69
4.8.5 Default............................................................................................................................70

© Microhard Systems Inc. 8
Table of Contents (continued)
4.9 I/O..............................................................................................................................................71
4.9.1 Status.............................................................................................................................71
4.10 Advanced...................................................................................................................................72
4.10.1 VPN / IPsec....................................................................................................................72
4.10.1.1 Gateway to Gateway (Site-to-Site)..................................................................72
4.10.1.2 L2TP Server ....................................................................................................76
4.10.1.3 L2TP Client......................................................................................................80
4.10.1.4 VPN Client Status............................................................................................82
4.10.2 GRE Tunneling...............................................................................................................83
4.10.3 GPS................................................................................................................................87
4.10.4 Event Reporting .............................................................................................................92
4.10.4.1 Configuration ...................................................................................................92
4.10.4.2 Message Structure ..........................................................................................93
4.10.4.3 Message Payload............................................................................................94
4.10.5 SMS................................................................................................................................95
4.10.6 SMS Alerts .....................................................................................................................96
4.10.7 Netflow Report................................................................................................................98
4.11 Tools..........................................................................................................................................99
4.11.1 Maintenance....................................................................................................99
4.11.1.1 Configuration Backup (WebUI/FTP).................................................99
4.11.1.3 Configuration Restore (WebUI/FTP)...............................................101
4.11.1.5 Firmware Upgrade (WebUI/FTP)....................................................103
4.11.2 Management..................................................................................................105
4.11.3 Diagnostic Utilities (Ping/Trace Route)..........................................................106
4.11.4 Reset to Default.............................................................................................107
4.11.5 Reboot System..............................................................................................107
4.12 Logout......................................................................................................................................108
5.0 AT Commands................................................................................................... 109
5.1 AT Command Overview...........................................................................................................109
5.1.1 Serial Port Configuration..............................................................................................109
5.1.2 Telnet TCP/IP Configuration........................................................................................110
5.2 AT Command Syntax...............................................................................................................111
5.3 Supported AT Commands.......................................................................................................112
General....................................................................................................................................112
USB Config..............................................................................................................................112
Security....................................................................................................................................129
CarrierConfig...........................................................................................................................130
COM Config.............................................................................................................................137
SMS Messaging.......................................................................................................................150
Appendices
Appendix A: RS485 Wiring...........................................................................................................156
Appendix B: Serial Interface ........................................................................................................157
Appendix C: “system.conf” File Structure .................................................................................158
Appendix D: SNMP MIB File Sample...........................................................................................183
Appendix E: Digital I/O: Driving an External Relay ...................................................................198

© Microhard Systems Inc. 9
1.0 Overview
The IPn3G is a high-performance 3G Cellular Ethernet/Serial/USB Gateway. Equipped with 2
serial data ports, 1 USB, and 1 Ethernet Port, the IPn3G provides complete access to remote
devices. Using the vast established infrastructure of cellular networks, the IPn3G can provide
data services anywhere coverage is provided.
While private wireless networks can provide wireless data services, using FHSS ISM bands, or
secure dedicated licensed radio’s, coverage is only available where radio’s, repeaters, and other
equipment is deployed. Achieving a wide coverage area generally involves many radio units,
antennas, possibly private or shared towers and large amounts of planning.
The IPn3G operates on HSPA & Quad Band GSM cellular networks, using 3G and/or EDGE/
GPRS technology to provide fast and reliable data transfer.
The small size and superior performance of the IPn3G makes it ideal for many applications.
Some typical uses for this modem:
1.1 Performance Features
Key performance features of the IPn3G include:
 communicates with virtually all PLCs, RTUs, and serial devices through either one of
two available RS232 interface, RS422, or RS485
 fastest serial rates: 300 baud to 921kbps
 advanced serial port supports legacy serial devices, including RTS, CTS, DSR, DTR,
and DCD.
 Easy to manage through web- or text-based user interface, or SNMP
 wireless firmware upgrades
 system wide remote diagnostics
 advanced security features
 industrial temperature specifications
 DIN rail mountable
 Optional Class 1 Div 2
 Available as OEM solution
Supporting co-located independent networks and with the ability to carry both serial and IP traf-
fic, the IPn3G supports not only network growth, but also provides the opportunity to migrate
from asynchronous serial devices connected today to IP-based devices in the future.
 SCADA
 remote telemetry
 traffic control
 industrial controls
 remote monitoring
 LAN extension
 GPS
 wireless video
 robotics
 display signs
 fleet management
A SERIAL GATEWAY
allows asynchronous
serial data to enter (as
through a gate) the
realm of IP
communications.
The serial data is
encapsulated within
UDP or TCP packets.

© Microhard Systems Inc. 10
1.0 Overview
1.2 IPn3G Specifications
Electrical/General
Supported Bands: HSPA & Quad Band GSM
850/1900/1700-2100 (HSPA)
850/900/1800/1900 MHz (GSM)
Data Features: HSPA
Up to 7.2 Mbps downlink
Up to 5.76 Mbps uplink
EDGE/GPRS
Multi-Slot Class 12
TX Power: HSPA - Class 3 (0.25W)
GSM 850/900 MHz - Class 4 (2W)
GSM 1800/1900 MHz - Class 1 (1W)
EDGE 850/900 MHz - Class E2 (0.5W)
EDGE 1800/1900 MHz - Class E2 (0.4W)
Serial Interface: RS232, RS485, RS422
Serial Baud Rate: 300bps to 921kbps
USB: USB 2.0
USB Console Port
USB to Serial Data Routing
USB to Ethernet Data Routing
Ethernet: 10/100 BaseT, Auto - MDI/X, IEEE 802.3
SIM Card: 1.8 / 3.0V
PPP Characteristics: Dial on Demand
Idle Time
Network Protocols: TCP, UDP, TCP/IP, TFTP, ARP, ICMP, DHCP, HTTP,
HTTPS*, SSH*, SNMP, FTP, DNS, Serial over IP, QoS
Management: Local Serial Console, Telnet, WebUI, SNMP, FTP &
Wireless Upgrade, RADIUS authentication, IPsec VLAN
Diagnostics: Temperature, RSSI, remote diagnostics
Input Voltage: 7-30 VDC
GPS: Sensitivity: - Autonomous acquisition: -145 dBm
- Tracking Sensitivity: -158 dBm (50% valid fixes)
Position Accuracy: - Tracking L1, CA code
- 12 Channels
- Max. update rate 1 Hz
Error calculated location less than 11.6 meters 67% of the time, and
less than 24.2 meters 95% of the time.
Caution: Using a
power supply that
does not provide
proper voltage or
current may damage
the modem.

© Microhard Systems Inc. 11
1.0 Overview
1.2 IPn3GSpecifications (Continued)
Environmental
Operation Temperature: -40oF(-40oC) to 185oF(85oC)
Humidity: 5% to 95% non-condensing
Mechanical
Dimensions: 2.21” (56mm) X 3.85” (97mm) X 1.46” (37mm)
Weight: Approx. 245 grams
Connectors:
Antenna: Main TX/RX: SMA Female
Diversity: SMA Female
GPS: SMA Female
Data, etc: Data: DE-9 Female
Ethernet : RJ-45
GPS Antenna Requirements:
- Frequency Range: 1575.42 MHz (GPS L1 Band)
- Bandwidth: +/- 2 MHz
- Total NF < 2.5dB
- Impedance 50ohm
- Amplification (Gain applied to RF connector): 19dB to 23dB
- Supply voltage 1.5V to 3.05V
- Current consumption - Typical 20mA (100mA max)
- Cellular Power Antenna Rejection + Isolation:
- 824 - 915 MHz > 10dB
- 1710 - 1785 MHz > 19dB
- 1850 - 1980 MHz > 23dB

© Microhard Systems Inc. 12
2.0 Quick Start
This QUICK START guide will walk you through the setup and process required to
access the WebUI configuration window and to establish a basic wireless connection
to your carrier.
Note that the units arrive from the factory with the Local Network setting configured
as ‘Static’ (IP Address 192.168.0.1, Subnet Mask 255.255.255.0, and Gateway
192.168.0.1), in DHCP server mode. (This is for the Ethernet Adapter on the back
of the IPn3G unit.
2.1 Installing the SIM Card
 Before the IPn3G can be used on a cellular network a valid SIM Card for your
Wireless Carrier must be installed. Insert the SIM Card into the slot as shown
below.
2.2 Getting Started
 Connect the Antenna’s to the applicable ANTENNA jack’s of the IPn3G.
 Connect the Phoenix-Type Connector to the power adapter as shown below and
apply power to the unit.
SIM Card Slot
To reset to factory
defaults, press and
hold the CFG button
for 8 seconds with the
IPn3G powered up.
The LED’s will flash
quickly and the IPn3G
will reboot with factory
defaults.
Main Antenna (SMA)
(GPS & Diversity not shown)
Use the MHS-supplied
power adapter or an
equivalent power
source.
RS485/422
TxB -
TxA -
RxB -
RxA -
GND -
Vin+ -
U
SB
DIAGN
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SIS
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NL
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TATUS
CO
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SIMC
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© Microhard Systems Inc. 13
2.0 Quick Start
 Connect A PC configured for DHCP directly to the ETHERNET port of the IPn3G,
using an Ethernet Cable. If the PC is configured for DHCP it will acquire a IP Ad-
dress from the IPn3G.
 Open a Browser Window and enter the IP address 192.168.0.1 into the address
bar.
 The IPn3G will then ask for a Username and Password. Enter the factory de-
faults listed below.
192.168.0.1
The factory default
network settings:
IP: 192.168.0.1
Subnet: 255.255.255.0
Gateway: 192.168.0.1
The Factory default login:
User name: admin
Password: admin
The factory default login:
User name: admin
Subnet: admin
It is always a good idea to
change the default admin
login for future security.

© Microhard Systems Inc. 14
2.0 Quick Start
 Once successfully logged in, the System Summary Window will be displayed.
 To establish basic wireless connectivity with your carrier, the information in the
Carrier > Config menu must be completed as provided by your carrier.
Carriers may require different
information to be filled out.
Contact them for specific con-
nection information.
For SIM Cards issued with Dy-
namic IP addresses most carri-
ers simply require the correct
APN. SIM Cards assigned Static
public IP address often require
a login details.
Carriers require the following
information:
Always Required:
Access Point Name (APN)
Some Carriers Require:
Authentication Type
User Name
Password

© Microhard Systems Inc. 15
2.0 Quick Start
 Verify connectivity with your Wireless Carrier by selecting Carrier > Statistics
or System > Summary. Your carriers name should appear next to the Network
entry and the Activity Status should read as: Call in progress
 If you do not see “Call in Progress” you are not connected to or communicating
with your wireless carrier.
 Check that the SIM card is installed correctly.
 Verify that the proper antennas are installed correctly
 Verify the APN assigned by the carrier.
 Re-Enter the login details, if required by the carrier, to ensure any typing
errors.
 You see “Call in Progress”, but no Internet Access. Check the WAN IP Address in
the Carrier > Statistics or System > Summary screens. If an IP Address is
not shown, check the APN and login details for errors.
 Refer to Section 4.0 WebUI Configuration to configure serial ports, USB, or any
security or firewall features required on the IPn3G.
Carrier Name
Service Type

© Microhard Systems Inc. 16
3.0 Hardware Description
3.1 IPn3G Hardware
The IPn3G provides a fully enclosed, stand alone modem, requiring only cabled connections.
The IPn3G can be used on a table top like surface, or using the mounting holes provided can be
mounted anywhere for a permanent solution.
 Power
 Data (Serial) Interface
 Ethernet Interface
 USB Interface
 LED Indicators
 Antenna’s (Main, GPS, Diversity)
Image 3-1: IPn3G Front View
Image 3-2: IPn3G Back View

© Microhard Systems Inc. 17
3.0 Hardware Description
3.1.1 IPn3G Mechanical Drawings
Drawing 3-2: IPn3G Front View
Image 3-3: IPn3G Back View
Notes: The dimension unit is inches.
Drawing 3-1: IPn3G Top View
IPn3G-ENC
Top View
microhard SYSTEMS INC.
SIM CARD
RSSI
DIAGNOSTIC RF SGNL
STATUS
CONFIG
USB
RS485/422
Vin+
GND
RxA
RxB
TxA
TxB
DATA ETHERNET
ANTENNA
GPS
RX DIV

© Microhard Systems Inc. 18
3.0 Hardware Description
3.1.2 Connectors and Indicators
3.1.2.1 Front
On the front of the IPn3G is the USB port, DIAGNOSTIC port, CONFIG Button, RSSI, STATUS, RF and
SGNL LED’s as described below:
The USB port can be used for: (See Section 4.1.7 USB Configuration)
 Console Port
 Data Mode
 NDIS Mode
The Diagnostic port (RS232) is used for:
 AT Command Interface at 115.2kbps and
HyperTerminal (or equivalent).
 User data (RS232 - RxD, TxD, and SG)
 Digital I/O—Input Pin 7, Output Pin 8
CONFIG (Button) - Holding this button depressed while powering-up the IPn3G will boot the unit into
FLASH FILE SYSTEM RECOVERY mode. The default IP address for system recovery (only - not for nor-
mal access to the unit) is static: 192.168.1.39.
If the unit has been powered-up for some time (>1 minute), depressing the CFG Button for 8 seconds will
result in FACTORY DEFAULTS being restored, including a static IP address of 192.168.0.1. This IP ad-
dress is useable in a Web Browser for accessing the Web User Interface.
RF LED (Red) - When connected to a 2G/EDGE or 3G-WCDMA Network, the RF LED indicates
a transmission burst. When connected to a 3G/HSPA Network the LED has no function.
SGNL LED (Green) - When illuminated, the SGNL LED indicates that the modem is connected and syn-
chronized with a wireless carrier.
Receive Signal Strength Indicator (RSSI) (3x Green) - As the received signal strength increases,
starting with the furthest left, the number of active RSSI LEDs increases. If the measured signal strength is
less than –110dBm no LED’s will be illuminated. If the signal is greater than –105dBm, 1 LED will be on, -
100dBm equals 2 LED’s, and any signal greater than –95dBm will show all 3 RSSI LED’s to be ON.
STATUS LED (Red) - Upon initial application of power the STATUS LED will be illuminated for approxi-
mately 20 seconds, after which time it will being to blink slowly (loading) for an additional 25 seconds, then
stay ON ‗solid‘ (indicating it has achieved its specific operational status).
Drawing 3-4: IPn3G Front View
Signal
Name PIN # Input or Output
RXD 2 O
TXD 3 I
SG 5
Digital In 7 I
Digital Out 8 O
Table 3-1: Diagnostic Port RS232 Pin Assignment
Windows USB driver
downloads are available
to registered users
from:
microhardcorp.com/
support
microhard SYSTEMS INC.
SIM CARD
RSSI
DIAGNOSTIC RF SGNL
STATUS
CONFIG
USB
Digital I/O is only
available and has been
implemented on units
shipped after June 1,
2012

© Microhard Systems Inc. 19
3.0 Hardware Description
Drawing 3-5: IPn3G Rear View
The DATA (RS232 Port (DCE)) on the rear
of the circuit board is used for:
 RS232 serial data (300-921kbps) when
in DATA MODE, or
 for configuring the modem when in
COMMAND MODE.
The RS422/485 Port is used to interface the Nano
Development Board to a DTE with the same
interface type. Either the RS232 or RS422/485 interface is
used for data traffic.
Vin+/Vin–is used to power the unit. The input Voltage
range is 7-30 Vdc.
3.1.2 Connectors and Indicators
3.1.2.2 Rear
On the back of the IPn3G is the Data port, RS485/422 interface, as well as the power connections. The
unit also has the SMA(F) connectors for the Main (TX/RX), GPS and the Diversity (RX) antenna’s.
Name Data Port Input or
Output
DCD 1 O
RXD 2 O
TXD 3 I
DTR 4 I
SG 5
DSR 6 O
RTS 7 I
CTS 8 O
RING 9 O
Table 3-2: Data RS232 Pin Assignment
Caution: Using a
power supply that
does not provide
proper voltage may
damage the modem.
RS485/422
TxB -
TxA -
RxB -
RxA -
GND -
Vin+ -
Green Conn.
Pin No. Name Input or Output
6 TxB (D+) O
5 TxA (D-) O
4 RxB (R+) I
3 RxA (R-) I
2 Vin -
1 Vin + I
Table 3-3: Data RS422/485 / Vin Pin Assignment
RS485/422
Vin+
GND
RxA
RxB
TxA
TxB
DATA ETHERNET
ANTENNA
GPS
RX DIV

© Microhard Systems Inc. 20
4.0 WebUI Configuration
The Web User Interface (WebUI) is a browser based configuration method that allows a user a
graphical interface to configure, test and troubleshoot a IPn3G unit. Any standard web browser
can be used and no additional software is required. Using the Web User Interface a user can:
 Remotely or locally configure a IPn3G unit, including:
 Network settings
 Radio configuration
 Serial Port configuration
 Security
 USB
 Retrieve unit revisions
 Update system firmware
 Much more...
In this section, all aspects of the Web Browser Interface, presented menus, and available
configuration options will be discussed.