GE MDS iNET Series User manual

Reference Manual
MDS 05-2806A01, Rev. L
OCTOBER 2014
Wireless IP/Ethernet Transceiver
iNET-II 900 and iNET 900 Firmware Release 8.1.1 and later
MDS iNET Series
MDS iNET-II 900TM
MDS iNET 900TM

Quick-Start instructions for this product are contained in publication 05-2873A01.
Visit our web site for downloadable copies of all documentation at www.gemds.com.

05-2806A01, Rev. L MDS iNET Series Reference Manual i
TABLE OF CONTENTS
1.0 Product Overview and Applications................... 1
1.1 About This Manual.......................................................................................................... 1
1.1.1 Related Publication ............................................................................................................. 1
1.2 Product Description......................................................................................................... 1
1.2.1 Rugged Packaging .............................................................................................................. 1
Simple Installation..................................................................................................................... 1
Secure Operation...................................................................................................................... 2
Robust Radio Operation ........................................................................................................... 2
Flexible Services....................................................................................................................... 2
Flexible Management................................................................................................................ 2
Transceiver Features................................................................................................................ 2
1.2.2 Model Offerings ................................................................................................................... 3
1.2.3 Differences Between iNET and iNET-II Models ................................................................... 3
1.2.4 MDS P21 Protected Network (Redundant) Configuration ................................................... 4
1.3 Applications..................................................................................................................... 4
1.3.1 Wireless LAN ....................................................................................................................... 4
1.3.2 Point-to-Point LAN Extension .............................................................................................. 5
1.3.3 Backhaul for Serial Radio Networks .................................................................................... 5
1.3.4 Multiple Protocols and/or Services ...................................................................................... 6
1.3.5 Wireless LAN with Mixed Services ...................................................................................... 7
1.3.6 Upgrading Older Wireless Networks with Serial Interfaces ................................................. 7
Replacing Legacy Wireless Products ....................................................................................... 7
Supplement Legacy Wireless Networks with IP Services......................................................... 8
1.3.7 High-Speed Mobile Data ...................................................................................................... 8
1.4 Network Design Considerations...................................................................................... 8
1.4.1 Extending Network Coverage with Repeaters ..................................................................... 8
What is a Repeater System? .................................................................................................... 8
Option 1—Using Two Transceivers to Form a Repeater Station (back-to-back repeater)........ 8
Option 2—Using the AP as a Store-and-Forward Packet Repeater......................................... 9
1.4.2 Protected Network Operation using Multiple Access Points ................................................ 9
1.4.3 Collocating Multiple Radio Networks ................................................................................. 10
The Network Name and the association process ................................................................... 10
Can radio frequency interference (RFI) disrupt my wireless network? ................................... 10
1.5 Cyber Security ...............................................................................................................11
1.6 Accessories................................................................................................................... 12

ii MDS iNET Series Reference Manual 05-2806A01, Rev. L
2.0 Embedded Management System ......................14
2.1 Introduction................................................................................................................... 14
2.1.1 Differences in the User Interfaces .....................................................................................16
2.2 Accessing the Menu System......................................................................................... 17
2.2.1 Methods of Control ............................................................................................................ 17
2.2.2 PC Connection & Log In Procedures ................................................................................ 17
Starting a Local Console Session (Recommended for first-time log-in).................................. 17
Starting a Telnet Session ........................................................................................................ 19
Starting a Web Browser Session ............................................................................................ 20
2.2.3 Navigating the Menus ........................................................................................................ 21
Via Terminal Telnet or SSH Sessions
Recommended for first-time log-in.......................................................................................... 21
Logging Out Via Terminal Emulator or Telnet ......................................................................... 21
Navigating via Web Browser................................................................................................... 22
Logging Out Via Web Browser................................................................................................ 22
2.3 Basic Device Information.............................................................................................. 22
2.3.1 Starting Information Screen ............................................................................................... 22
2.3.2 Main Menu ......................................................................................................................... 24
2.3.3 Configuring Basic Device Parameters ............................................................................... 25
Device Information.................................................................................................................. 25
Device Names Menu...............................................................................................................26
Login Status Menu.................................................................................................................. 27
2.4 Configuring Network Parameters.................................................................................. 27
2.4.1 Network Configuration Menu .............................................................................................27
2.4.2 Network Interface Configuration Menu .............................................................................. 29
Virtual LAN in iNET Series......................................................................................................30
Configuring for Operation with VLAN...................................................................................... 30
Configuring the IP Address when VLAN Status is Enabled.................................................... 31
Configuring the IP Address When VLAN Status is Disabled................................................... 32
2.4.3 Ethernet Port Configuration Menu ..................................................................................... 33
2.4.4 DHCP Server Configuration ..............................................................................................35
2.4.5 SNMP Agent Configuration ...............................................................................................36
2.4.6 Trap Manager Submenu .................................................................................................... 37
2.4.7 SNMP V3 Accounts Submenu ........................................................................................... 38
2.4.8 Prioritized AP Configuration Submenu .............................................................................. 38
2.4.9 Bridge Configuration Submenu ......................................................................................... 39
2.5 Radio Configuration...................................................................................................... 40
2.5.1 Radio Configuration Menu ................................................................................................. 40
2.5.2 Channel Config Menu ........................................................................................................ 42
2.5.3 Advanced Configuration Menu .......................................................................................... 44
2.5.4 Skip Zones Menu .............................................................................................................. 44
2.5.5 Auto Data Rate Configuration Menu .................................................................................. 45

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2.5.6 Mobility Configuration Menu .............................................................................................. 47
Additional Considerations for Mobile Operation...................................................................... 48
At Every Mobile (Remote) Radio ............................................................................................ 48
At Every AP Radio .................................................................................................................. 48
2.6 Configuring the Serial Ports.......................................................................................... 49
2.6.1 Overview ........................................................................................................................... 49
Com1 Port–Dual Purpose Capability ...................................................................................... 49
TCP vs. UDP........................................................................................................................... 49
Serial Encapsulation............................................................................................................... 49
TCP Client vs. TCP Server..................................................................................................... 49
UDP Multicast......................................................................................................................... 50
PPP......................................................................................................................................... 50
DF1/EIP .................................................................................................................................. 50
MODBUS/TCP........................................................................................................................ 50
Data Buffering......................................................................................................................... 51
Implementing Configuration Changes..................................................................................... 51
Serial Configuration Wizard.................................................................................................... 51
2.6.2 Serial Data Port Configuration Menu ................................................................................. 51
2.6.3 Configuring for UDP Mode ................................................................................................ 52
2.6.4 Configuring for TCP Mode ................................................................................................. 54
2.6.5 Configuring for PPP Mode ................................................................................................. 56
2.6.6 Configuring for DF1/EIP .................................................................................................... 57
2.6.7 Configuring for MODBUS/TCP Server .............................................................................. 58
2.6.8 IP-to-Serial Application Example .......................................................................................58
2.6.9 Point-to-Multipoint IP-to-Serial Application Example ......................................................... 59
2.6.10 Point-to-Point Serial-to-Serial Application Example ........................................................ 61
2.6.11 Combined Serial and IP Application Example ................................................................. 62
Operation and Data Flow........................................................................................................ 62
2.6.12 Virtual LAN in iNET-II and iNET ...................................................................................... 64
2.7 Cyber Security Configuration........................................................................................ 64
2.7.1 Device Security ................................................................................................................. 64
2.7.2 Wireless Security ............................................................................................................... 65
Local Authentication—Approved Remotes/Access Points List Submenu............................... 66
2.7.3 RADIUS Configuration ...................................................................................................... 67
Operation of Device Authentication ........................................................................................ 67
Operation of User Authentication............................................................................................ 67
2.7.4 RADIUS Configuration ...................................................................................................... 68
2.7.5 Certificate Management (Remote transceivers only) ........................................................ 68
2.8 Performance Verification............................................................................................... 69
2.8.1 RSSI by Zone Menu (Remotes Only) ................................................................................ 71
2.8.2 Event Log Menu ................................................................................................................ 71
Time and Date......................................................................................................................... 72
View Current Alarms............................................................................................................... 73
View Event Log....................................................................................................................... 73
2.8.3 Packet Statistics Menu ...................................................................................................... 74

iv MDS iNET Series Reference Manual 05-2806A01, Rev. L
Wireless Packet Statistics....................................................................................................... 74
Ethernet Packet Statistics ....................................................................................................... 74
Packets Received by Zone..................................................................................................... 75
2.8.4 Wireless Network Status (Remotes Only) ......................................................................... 76
The Transceiver’s Association Process.................................................................................. 76
2.8.5 Remote Listing Menu (Access Points Only) ..................................................................... 78
2.8.6 Endpoint Listing Menu (Access Points Only) ..................................................................... 79
2.8.7 Remote Performance Listing Menu (Access Points Only) ................................................ 80
2.8.8 Bridge Status Menu ........................................................................................................... 81
2.8.9 Serial Data Statistics Menu ................................................................................................ 81
2.9 Maintenance ................................................................................................................. 82
2.9.1 Reprogramming Menu ....................................................................................................... 83
Upgrading the Firmware ......................................................................................................... 84
Error Messages During File Transfers.................................................................................... 86
2.9.2 Configuration Scripts Menu ............................................................................................... 87
How Configuration Files Work ................................................................................................ 87
Editing Configuration Files...................................................................................................... 88
2.9.3 Authorization Key Menu .................................................................................................... 89
2.9.4 Change the Type of Remote ............................................................................................. 89
2.9.5 Auto-Upgrade/Remote-Reboot Menu ................................................................................ 90
Firmware Upgrade (with AP Acting as a TFTP Server).......................................................... 90
2.9.6 Radio Test Menu ............................................................................................................... 90
2.9.7 Ping Utility Menu ............................................................................................................... 92
2.9.8 Reset to Factory Defaults .................................................................................................. 92
Password Reset to Factory Default ........................................................................................ 92
2.9.9 Support Bundle .................................................................................................................. 92
3.0 Troubleshooting................................................. 94
3.1 Introduction............................................................................................................................ 94
3.1.1 Multiple Communication Layers ........................................................................................ 94
3.1.2 Unit Configuration .............................................................................................................. 94
3.1.3 Factory Assistance ............................................................................................................ 94
3.2 Troubleshooting with LEDs........................................................................................... 95
3.3 Troubleshooting with the Menu System........................................................................ 95
3.3.1 Starting Information Screen ............................................................................................... 97
3.3.2 Packet Statistics Menu ...................................................................................................... 98
3.3.3 Serial Port Statistics Menu ................................................................................................. 98
3.3.4 Diagnostic Tools ................................................................................................................ 98
3.4 Using Logged Operation Events................................................................................... 99
3.5 Alarm/Event Conditions ................................................................................................ 99
3.6 Correcting Alarm Conditions....................................................................................... 100

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3.7 Logged Events............................................................................................................ 102
4.0 Planning a Radio Network ...............................106
4.1 Installation Planning.................................................................................................... 106
4.1.1 General Requirements .................................................................................................... 106
Unit Dimensions.................................................................................................................... 107
DIN Rail Mounting Option ..................................................................................................... 108
4.1.2 Site Selection .................................................................................................................. 108
4.1.3 Equipment Grounding—Important ................................................................................... 109
4.1.4 Terrain and Signal Strength ............................................................................................. 109
4.1.5 Antenna & Feedline Selection ......................................................................................... 109
Antennas............................................................................................................................... 109
Feedlines ...............................................................................................................................110
4.1.6 How Much Output Power Can be Used? .........................................................................112
4.1.7 Conducting a Site Survey .................................................................................................112
4.1.8 A Word About Radio Interference .....................................................................................112
Calculating System Gain........................................................................................................113
4.1.9 Notes on Using 28 VDC Power Supplies .........................................................................113
4.2 Radio (RF) Measurements...........................................................................................114
4.2.1 Antenna System SWR and Transmitter Power Output .....................................................114
Introduction............................................................................................................................114
Procedure ..............................................................................................................................115
4.2.2 Antenna Aiming ................................................................................................................115
Introduction............................................................................................................................115
Procedure ..............................................................................................................................115
4.3 dBm-Watts-Volts Conversion Chart .............................................................................117
4.4 Performance Notes......................................................................................................117
4.4.1 Wireless Bridge ................................................................................................................117
4.4.2 Distance-Throughput Relationship ...................................................................................118
4.4.3 Data Latency—TCP versus UDP Mode ...........................................................................118
4.4.4 Data Compression ............................................................................................................118
4.4.5 Packets-per-Second (PPS) ..............................................................................................118
4.4.6 Station-to-Station Traffic ...................................................................................................119
4.4.7 Interference has a Direct Correlation to Throughput ........................................................119
4.4.8 Maximizing Throughput ....................................................................................................119
4.4.9 Placing an iNET Radio Behind a Firewall ........................................................................ 120
4.5 SNMPv3 Notes ........................................................................................................... 120
4.5.1 Overview ......................................................................................................................... 120
SNMPv3 Accounts................................................................................................................ 120
Context Names..................................................................................................................... 121
Password-Mode Management Changes............................................................................... 121

vi MDS iNET Series Reference Manual 05-2806A01, Rev. L
5.0 Technical Reference ........................................124
5.1 Data Interface Connectors.......................................................................................... 124
5.1.1 LAN Port .......................................................................................................................... 124
5.1.2 COM1 Port ...................................................................................................................... 125
5.1.3 COM2 Port ...................................................................................................................... 125
5.2 Fuse Replacement...................................................................................................... 126
5.3 Technical Specifications.............................................................................................. 126
5.4 Channel Hop Table ..................................................................................................... 129
APPENDIX A—MDS iNET/ENI Protocols............... 132
APPENDIX B—Glossary of Terms
& Abbreviations....................................................... 148
Copyright and Publication Notices
This publication is protected under copyright law. Copyright 2014, GE MDS. All rights reserved.
Historical revision note: There was no “Rev. I” issued for this manual, to avoid confusion with the
digit “1.” Publication went from Rev. H directly to Rev. K.
ISO 9001 Registration
GE MDS adheres to this internationally-accepted ISO 9001 quality system standard.
To our Customers
We appreciate your patronage. You are our business. We promise to serve and anticipate your
needs. We will strive to give you solutions that are cost effective, innovative, reliable and of the
highest quality possible. We promise to build a relationship that is forthright and ethical, one that
builds confidence and trust.
Products Covered in this Manual
Thismanualcoverstwo membersoftheMDSiNETTransceiverSeries,bothofwhicharedesigned
to be operated under the FCC’s Part 15 license-free rules. The iNET radio is a Frequency Hopping
Spread Spectrum (FHSS) transceiver that operates at data speeds of 256 and 512 kbps.
The iNET-II is a similar design, but it is certified under the Digital Transmission System (DTS)
provisions of FCC Part 15 and can operate at data speeds of 512 or 1024 kbps. Operational differ-
ences between these two models are identified, where necessary, in this manual.

05-2806A01, Rev. L MDS iNET Series Reference Manual vii
NOTE: MDS iNET and MDS iNET-II transceivers are not over-the-air compatible.
Other MDS iNET 900 Series Documentation
Quick Start Guide—The MDS iNET 900 Series Quick Start Guide, P/N 05-2873A01, is provided
with the transceiver and is limited to essential information needed for installers. The installation
guide assumes some guidance to installers will be provided by the readers of this manual. This
includes such things as antenna selection, radio communication site survey tools and techniques,
and network design.
Related Materials on the Internet—Data sheets, frequently asked questions, case studies, applica-
tion notes, firmware upgrades and other updated information is available on the GE MDS Web site
at www.gemds.com.
About GE MDS
Almost two decades ago, GE MDS began building radios for business-critical applications. Since
then, we’ve installed over a million radios in over 110 countries. To succeed, we overcame impass-
able terrain, brutal operating conditions and disparate, complex network configurations. We also
became experts in wireless communication standards and system applications worldwide. The
result of our efforts is that today, thousands of utilities around the world rely on GE MDS-based
wireless networks to manage their critical assets.
The majority of our radios deployed since 1985 are still installed and performing within our cus-
tomers' wireless networks. That’s because we design and manufacture our products in-house,
according to ISO 9001 which allows us to control and meet stringent global quality standards.
Thanks to our durable products and comprehensive solutions, GE MDS is the wireless leader in
industrial automation—including oil and gas production and transportation, water/wastewater
treatment, supply and transportation, electric transmission and distribution and many other utility
applications. GE MDS is also at the forefront of wireless communications for private and public
infrastructure and online transaction processing. Now is an exciting time for GE MDS and our cus-
tomers as we look forward to further demonstrating our abilities in new and emerging markets.
As your wireless needs change you can continue to expect more from us. We'll always put the per-
formance of your network above all. Visit us at www.gemds.com for more information.
Product Test Data Sheets
Test Data Sheets showing the original factory test results for this unit are available upon request
from the GE MDS Quality Leader. Contact the factory using the information at the back of this
manual. Serial numbers must be provided for each product where a Test Data Sheet is required.

viii MDS iNET Series Reference Manual 05-2806A01, Rev. L
OPERATIONAL & SAFETY NOTICES
UL/CSA Notice
This product is available for use in Class 1, Division 2, Groups A, B, C & D Hazardous Locations. Such locations are
defined in Article 500 of the National Fire Protection Association (NFPA) publication NFPA 70, otherwise known as
the National Electrical Code.
The transceiver has been recognized for use in these hazardous locations by two independent agencies —Underwriters
Laboratories (UL) and the Canadian Standards Association (CSA). The UL certification for the transceiver is as a Rec-
ognized Component for use in these hazardous locations, in accordance with UL Standard 1604. The CSA Certifica-
tion is in accordance with CSA STD C22.2 No. 213-M1987.
UL/CSA Conditions of Approval: The transceiver is not acceptable as a stand-alone unit for use in the hazardous
locations described above. It must either be mounted within another piece of equipment which is certified for
hazardous locations, or installed within guidelines, or conditions of approval, as set forth by the approving agencies.
These conditions of approval are as follows:
The transceiver must be mounted within a separate enclosure which is suitable for the intended application.
The antenna feedline, DC power cable and interface cable must be routed through conduit in accordance with the
National Electrical Code.
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 haz-
ardous locations, and may void the approval.
A power connector with screw-type retaining screws as supplied by GE MDS must be used.
Do not disconnect equipment unless power has been switched off or the area is known to
be non-hazardous.
Refer to Articles 500 through 502 of the National Electrical Code (NFPA 70) for further
information on hazardous locations and approved Division 2 wiring methods.
FCC Part 15 Notices
The transceiver series 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. This device is specifically designed to be used under Section 15.247
of the FCC Rules and Regulations. Any unauthorized modification or changes to this device without the express
approval of Microwave Data Systems may void the user’s authority to operate this device. Furthermore, the iNET
Series is intended to be used only when installed in accordance with the instructions outlined in this manual. Failure
to comply with these instructions may also void the user’s authority to operate this device.
Part 15 rules also require that the Effective Isotropic Radiated Power(EIRP) from anGE MDS iNET Series installation
not exceed 36 dBm. Refer to Antenna & Feedline Selection on Page 108 for more information.
Industry Canada RSS Notices
Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device
must accept any interference, including interference that may cause undesired operation of the device.
To reduce potential radio interference to other users, the antenna type and its gain should be chosen so that the Equiv-
alent Isotropic Radiated Power (EIRP) is not more than that permitted for successful communication.
Professional installation required. The radio equipment described in this guide emits radio
frequency energy. Although the power level is low, the concentrated energy from a direc-
tional antenna may pose a health hazard. Do not allow people to come closer than 23 cm
(9 inches) to the antenna when the transmitter is operating in indoor or outdoor environ-
ments. More information on RF exposure is on the Internet at
www.fcc.gov/oet/info/documents/bulletins.
RF Exposure
EXPLOSION
HAZARD!

05-2806A01, Rev. L MDS iNET Series Reference Manual ix
This device as been designed to operate with the antennas listed below, and having a maximum gain of 12 dB.
Antennas not included in this list or having a gain greater than 12 dB are strictly prohibited for use with this device.
The required antenna impedance is 50 ohms. The Antenna & Feedline Selection on Page 108 discusses antennas
acceptable for use with this transceiver.
Manual Revision and Accuracy
This manual was prepared to cover a specific version of firmware code. Accordingly, some screens and features may
differ from the actual unit you are working with. While every reasonable effort has been made to ensure the accuracy
of this publication, product improvements may also result in minor differences between the manual and the product
shipped to you. If you have additional questions or need an exact specification for a product, please contact our Cus-
tomer Service Team using the information at the back of this guide. In addition, manual updates can often be found on
the GE MDS Web site at www.gemds.com.
Environmental Information
The manufacture of this equipment has required the extraction and use of natural resources. Improper disposal may
contaminate the environment and present a health risk due to hazardous substances contained within. To avoid dissem-
ination of these substances into our environment, and to limit the demand on natural resources, we encourage you to
use the appropriate recycling systems for disposal. These systems will reuse or recycle most of the materials found in
this equipment in a sound way. Please contact GE MDS or your supplier for more information on the proper disposal
of this equipment.
Battery Disposal
This product may contain a battery. Batteries must be disposed of properly, and may not be disposed of as unsorted
municipal waste in the European Union. See the product documentation for specific battery information. Batteries are
marked with a symbol, which may include lettering to indicate cadmium (Cd), lead (Pb), or mercury (Hg). For proper
recycling return the battery to your supplier or to a designated collection point.

xMDS iNET Series Reference Manual 05-2806A01, Rev. L

05-2806A01, Rev. L MDS iNET Series Reference Manual 1
1.0 PRODUCT OVERVIEW AND
APPLICATIONS
1.1 About This Manual
This Reference Manual is designed for use by professional installers and technicians. It contains an in-depth
description of the product, including installation, configuration, and troubleshooting details.
1.1.1 Related Publication
A companion publication, the iNET Series Start-Up Guide is also available (Part No. 05-2873A01). This
smaller guide contains the essential information for installing the radio and placing it into operation. This
guide is recommended for those primarily involved in the installation and setup of the product.
1.2 Product Description
The GE MDS iNET 900 transceiver (Figure 1-1) provides an easy-to-install wireless local area network
(WLAN) service with long range and secure operation. It supports both Ethernet and serial data interface
options at over-the-air data speeds of up to 1 Mbps (iNET-II) and 512 kbps (iNET).
NOTE: For information on the MDS iNET 900 ENI, which provides expanded gateway and protocol
conversion capabilities not found in the iNET 900 (DF1 to EIP, and MODBUS to MODBUS TCP
conversions), refer to Appendix A, MDS iNET/ENI Protocols (beginning on Page 132).
Invisible place holder
Figure 1-1. The GE MDS iNET 900 Transceiver
1.2.1 Rugged Packaging
The transceiver is housed in a compact and rugged cast-metal case that need only be protected from direct
exposure to the weather. It contains a single printed circuit board with all necessary components for radio
operation and data communications. The only user-serviceable component in the case is a fuse on the DC
power input line.
Simple Installation
Most installations employ an omni-directional antenna at the Access Point (AP) location and a directional
antenna at each Remote unit. The antenna is a vital link in the system and must be chosen and installed cor-
rectly. See “Installation Planning” on Page 106 for guidance on choosing suitable installation sites and
antennas.

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For basic services, simply connect an antenna, connect your Ethernet LAN to the transceiver’s LAN port,
apply primary power, set a few operating parameters, and you are done. No license is required for operation
in the U.S.A., Canada, and many other countries. Check requirements for your region before placing the
transceiver in service.
Secure Operation
Data network security is a vital issue in today's wireless world. MDS iNET Series radios provide multiple
tools to help you build a network that minimizes the risk of eavesdropping and unauthorized access. Some
are inherent in the radio’s operation, such as the use of 900 MHz spread-spectrum transmissions; others
include data encryption, enabling/disabling remote access channels, and password protection.
Remember,securityis nota one-step processthat can simplybe turnedon and forgotten.Itmust bepracticed
and enforced at multiple levels, 24 hours-a-day and 7 days-a-week. See “Cyber Security” on Page 11 for
more information about the transceiver’s security tools.
Robust Radio Operation
The transceiver is designed for frequency-hopping spread-spectrum operation in the license-free 900 MHz
Industrial, Scientific, and Medical (ISM) band. It can provide reliable communications at distances up to 25
miles (40 km) over favorable terrain, even in the presence of weak signals or interference. Frequency hop-
ping allows the transceiver to avoid interference from other transmitters in the same band, and provides fre-
quency diversity for more reliable transmission. The over-the-air MAC increases reliability by adding
retries to failed messages.
The iNET-II transceiver, which is certified to operate under DTS rules (hopping not required), also hops in
order to achieve the same benefits that are realized with the iNET transceiver which is certified under FHSS
rules.
Flexible Services
Users with a mixture of equipment having Ethernet and serial data interfaces can choose to use one or two
of the user-configurable serial ports through the use of a Remote Dual Gateway. This flexibility allows the
transceiver to provide services in data networks that are being migrated from legacy serial/EIA-232-based
hardware to the faster and more easily interfaced Ethernet world.
Flexible Management
Configuration, commissioning, troubleshooting and other maintenance activities can be done locally or
remotely. Four different modes of access are available: local RS-232 console, local or remote Internet Pro-
tocol (IP) access via Telnet or SSH, web browser (HTTP, HTTPS), and SNMP (v1/v2/v3). The text-based
interface (RS-232 console Telnet and SSH) is implemented in the form of easy-to-follow menus, and the
terminal server configuration includes a wizard to help you set up the units correctly.
Transceiver Features
The transceiver’s design makes the installation and configuration easy, while allowing for changes in the
future.
• Long Range operation in line-of-sight conditions. Repeater stations may be used to extend the range.
(Refer to “TRANSMIT/RECEIVE RANGE (Nominal)” on Page 129 for more detailed information
on range.)
• Industrial-Grade Product—Extended temperature range for trouble-free operation in extreme envi-
ronments
• Robust Radio Communications—Designed to operate in dense, high-interference environments
• Robust Network Security—Prevents common attack schemes and hardware from gaining access or
control of network. Common attack events logged and reported by alarms.
• High Speed—1 Mbps (iNET-II) is 100-times faster than 9.6 kbps radios. MDS iNET transceiver
speed is 512 kbps.
• Plug-and-Play Connectivity—Ethernet bridge configuration option requires minimal setup

05-2806A01, Rev. L MDS iNET Series Reference Manual 3
• Serial Ports—Gateway for serial-based equipment to IP/Ethernet networks with embedded terminal
server. Site-to-site configurations are also possible.
• Single hardware package provides configuration as Access Point or Remote
1.2.2 Model Offerings
The transceiver comes in two primary models—Access Point and Remote. Additionally, three types of
Remote Gateways are available—the Ethernet Bridge, the Serial Gateway, and the Dual Gateway sup-
porting both IP/Ethernet and serial services. Table 1-1 summarizes the different interface abilities for each
type.
A unit can be configured by the owner to operate as an Access Point or as a Remote with some restrictions.
Only the Dual Gateway Remote units can be reconfigured as an Access Point. Ethernet Bridge and Serial
GatewayRemotescannot be reconfiguredas anAccessPoint unlessthey are firstupgraded toDual Gateway
type. This is accomplished with an “Authorization Key” purchased from the factory. Each one of these indi-
vidual software keys is associated with the serial number of the corresponding unit.
1.2.3 Differences Between iNET and iNET-II Models
The iNET and iNET-II Transceivers, while similar in many respects, do have some important differences.
The main differences are summarized in Table 1-2:
NOTE: The MDS iNET and MDS iNET-II transceivers are not over-the-air compatible.
NOTE: The radio does not support the simultaneous use of Fragmentation and Encryption. If encryption
is enabled (other than RADIUS), the fragmentation option will not be available.
Table 1-1. Transceiver Models and Data Interface Services
Model Type LAN1COM11COM2
Access Point2N/A Yes Yes Yes
Remote… Ethernet
Bridge3Yes No No
Serial
Gateway3No Yes Yes
Dual Gateway2Yes Yes Yes
NOTES
1.Provides access to the embedded Management System on all units.
2.Can be configured as an Access Point or Dual Gateway through the embedded Management System.
3.Can be upgraded to Dual Gateway with an Authorization Key.
Table 1-2. Transceiver Differences (iNET vs. iNET-II)
Characteristic iNET iNET-II
Data Rate 256/512 kbps 512 kbps/1 Mbps
FCC Certification Type FHSS DTS
Encryption RC4-128 AES-128
Channel size 316.5 kHz 600 kHz
Channel operation Zones Channels
Firmware Specific for iNET Specific for iNET-II

4 MDS iNET Series Reference Manual 05-2806A01, Rev. L
1.2.4 MDS P21 Protected Network (Redundant) Configuration
For mission-critical applications, GE MDS also offers the Protected Network Station. This radio incorpo-
rates two iNET Series transceivers, two power supplies, and a switchover logic board that automatically
selects between Transceiver A and Transceiver B as the active radio. Figure 1-2 shows a view of the pro-
tected chassis. For system-level information on this product, see publication 05-4161A01.
Invisible place holder
Figure 1-2. MDS P21 Protected Network Station
(Incorporates Two Transceivers, with Automatic Switchover)
1.3 Applications
The following sections provide illustrations of typical transceiver installations. This is meant as an overview
only. It is recommended that a network manager be involved in all installation planning activities.
1.3.1 Wireless LAN
The wireless LAN is the most common application of the transceiver. It consists of a central control station
(Access Point)and oneormore associatedRemoteunits, asshownin Figure 1-3on Page 5.A LAN provides
communications between a central WAN/LAN and remote Ethernet segments. The operation of the radio
system is transparent to the computer equipment connected to the transceiver.
The Access Point is positioned at a location from which it can communicate with all of the Remote units in
the system. Commonly, this is a high location on top of a building or communications tower. Messages are
exchanged at the Ethernet level. This includes all types of IP traffic.
A Remote transceiver can only talk over-the-air to an Access Point unit (AP). Peer-to-peer communications
between Remotes can only take place indirectly via the AP. In the same fashion, an AP can only talk
over-the-air to associated Remote units. Exception: Two APs can communicate with each other
“off-the-air” through their Ethernet connectors using a common LAN/WAN.

05-2806A01, Rev. L MDS iNET Series Reference Manual 5
Invisible place holder
Figure 1-3. Typical Wireless LAN
1.3.2 Point-to-Point LAN Extension
A point-to-point configuration (Figure 1-4) is a simple arrangement consisting of an Access Point and a
Remote unit. This provides a communications link for the transfer of data between two locations.
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Figure 1-4. Typical Point-to-Point Link
1.3.3 Backhaul for Serial Radio Networks
One of the primary design features of the transceiver is to provide a path for serial devices to migrate to
IP/Ethernet. Many radio networks in operation today still rely on serial networks at data rates of 9600 bps
or less. These networks can use the transceiver as a means to continue using the serial service, while
allowing the rest of the infrastructure to migrate to an IP format.
A Remote transceiver using one serial port for the data stream, and the other for network-wide diagnostics
can support operational radio networks built with serial-based radios, such as MDS x790/x710, MDS
TransNET and others. In the case of radios using a single port for data and diagnostics, the capabilities are
doubled. The data streams are delivered to an IP socket in an application, or in serial format using the Access
Point. See Figure 1-5 on Page 6.
Remote
Remote
Acess Point
Remote
Remote
WAN/LAN
LAN
LAN
LAN
LAN
LAN/WAN
Access Point Remote
LAN

6 MDS iNET Series Reference Manual 05-2806A01, Rev. L
Invisible place holder
Figure 1-5. Backhaul Network
1.3.4 Multiple Protocols and/or Services
Prior to the iNET Series, two radios were often used to service two different types of devices (typically con-
nected to different SCADA hosts). An iNET or iNET-II radio provides this functionality with a single
remote radio. Each of the two serial ports can be connected via IP to different SCADA hosts, transporting
different(orthe same)protocols. Bothdata streamsare completelyindependentand thetransceiverprovides
seamless simultaneous operation as shown in Figure 1-6. Invisible place holder
Figure 1-6. Multiple Protocol Network
By using a single radio, the cost of deployment is cut in half. Beyond requiring only one radio instead of
two, the biggest cost reduction comes from using half of the required infrastructure at the remote site: one
antenna, one feedline, one lightning protector and ancillary hardware. Other cost reductions come from the
system as a whole, such as reduced management requirements. And above all, the radio offers potential for
future applications that run over Ethernet and IP, such as video for remote surveillance.
Data
Data
MDS 4790
Master
MDS 9790
Master
MDS 9810
Master
Diagnostics
Data
Diagnostics
Diagnostics
MDS 4710 Remote
NMS Control
Point SCADA Host Modbus/IP
HUB Access Point
MDS 4710 Remote
MDS 9710 Remote
MDS 9710 Remote
MDS 9810 Remote
MDS 9810 Remote
Remote Serial
Remote Serial
Remote Serial
NETWORK
ROUTER
ROUTER Serial
Device
Serial
Device
Serial
Device
Serial
Device
Serial
Device
Serial
Device
NETview SCADA Host
Total Flow
Access Point
Remote Serial
Remote Serial
SCADA Host
Modbus/IP
Remote Serial
Access Point
RTU
Flow Meter
EIA-232
EIA-232
EIA-232
EIA-232
EIA-232
EIA-232
ROUTER
HUB Serial
Device
Serial
Device
Serial
Device
Serial
Device
HUB
HUB
HUB
WAN

05-2806A01, Rev. L MDS iNET Series Reference Manual 7
1.3.5 Wireless LAN with Mixed Services
The iNET transceiver is an excellent solution for a long-range industrial wireless LAN. It offers several
advantages over commercial solutions—primarily improved performance over extended distances. The
rugged construction of the radio and its extended temperature range make it an ideal solution even in harsh
locations. In extreme environments, a simple NEMA enclosure is sufficient to house the unit.
The transceiver trades higher speed for longer range. Commercial 802.11a/b/g solutions are designed to pro-
vide service to relatively small areas such as offices, warehouses and homes. They provide high data rates
but have limited range. The iNET transmits at a higher power level, uses a different frequency band, has
higher sensitivity, and a narrower channel to concentrate the radio energy and reach farther distances. It is
designed for industrial operation from the ground up.
IP-based devices that may be used with the transceiver include a new breed of more powerful Remote Ter-
minal Units (RTUs) and Programmable Logic Controllers (PLCs). These, as well as other devices, may be
used in applications ranging from SCADA/telemetry monitoring, web-based video, security monitoring,
and voice over IP. Figure 1-7 shows a typical wireless IP network. Invisible place holder
Figure 1-7. Extended-Range LAN with Mixed Applications
1.3.6 Upgrading Older Wireless Networks with Serial Interfaces
Millions of wireless data products have been sold in the last two decades for licensed and license-free oper-
ation, many of them manufactured by GE MDS. There are several ways that these systems can benefit from
incorporating iNET equipment. The chief advantages are interface flexibility (serial and Ethernet in one
unit), and higher data throughput. By taking advantage of its built-in serial and Ethernet interfaces, the trans-
ceiver is well suited to replace leased lines, dial-up lines, or existing MAS 900 MHz data transceivers.
Replacing Legacy Wireless Products
In most cases, legacy radio transceivers supporting serial-interface equipment can be replaced with iNET
transceivers. Legacy equipment can be connected to the transceiver through the COM1 or COM2 port with
a DB-25 to DB-9 cable wired for EIA-232 signaling. The COM2 port supports all standard EIA-232 sig-
naling and acts as a data-terminal equipment device (DTE).
NOTE: Several previous MDS-brand products had non-standard signal lines on their interface connectors
(to control sleep functions and alarm lines, for example). These special functions are not provided
nor supported by the iNET Series. Consult equipment manuals for complete pinout information.
NMS Control
Point SCADA Host Modbus/IP
Access Point
Remote Bridge
Printer
Remote Bridge
IP Camera
IP/Ethernet Device
IP/Ethernet Device
IP/Ethernet Device

8 MDS iNET Series Reference Manual 05-2806A01, Rev. L
Supplement Legacy Wireless Networks with IP Services
The iNET Dual Gateway model can support up to two serial devices and one Ethernet connection at the
same time. The serial interfaces (COM1 and COM2) operate in two different modes: Connectionless UDP
and connection-oriented TCP.
In the UDP mode, the transceiver supports point-to-multipoint serial-port to serial-port connectivity. In the
TCP mode, it supports point-to-point Ethernet/IP to serial port connectivity.
For further details on the transceiver’s Serial Gateway interface modes, see “Configuring the Serial Ports”
on Page 49.
1.3.7 High-Speed Mobile Data
The iNET radios support high-speed data communications in a mobile environment. Remote radios roam
between different access points, providing seamless transitions and continuous coverage. For additional
information on configuring a mobile network, refer to “Mobility Configuration Menu” on Page 47.
1.4 Network Design Considerations
1.4.1 Extending Network Coverage with Repeaters
What is a Repeater System?
A repeater works by re-transmitting data from outlying remote sites to the Access Point and vice-versa. It
introduces some additional end-to-end transmission delay but provides longer-range connectivity.
In some geographical areas, obstacles can make communications difficult. These obstacles are commonly
large buildings, hills, or dense foliage. These obstacles can often be overcome with a repeater station.
Option 1—Using Two Transceivers to Form a Repeater Station (back-to-back re-
peater)
Although the range between transceivers can be a nominal 40 km (25 miles) over favorable terrain, it is pos-
sible to extend the range considerably by connecting two units together at one site in a “back-to-back”
fashion to form a repeater, as shown in Figure 1-8. This arrangement should be used whenever the objective
is to utilize the maximum range between stations. In this case, using high-gain Yagi antennas at each loca-
tion will provide more reliable communications than their counterparts—omnidirectional antennas.
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Figure 1-8. Typical LAN with a Repeater Link
Access Point
Remote
Remote
Remote
Remote
Access
Point
LAN/WAN
REPEATER
Crossover Cable
LAN
LAN
LAN
Ethernet
POINT-TO-POINT LINK