GE MDS DS-MERCURY3650 User Manual

TM

MDS Mercury Series

Reference Manual

Wireless IP/Ethernet Transceiver

Covering AP and Remote Units

DRAFT

MDS 05-4446A01, Rev. 02

AUGUST 2008

TABLE OF CONTENTS

1 PRODUCT OVERVIEW AND APPLICATIONS............ 1

1.1 ABOUT THIS MANUAL.........................................................................................................3

1.1.1 Start-Up Guide ...........................................................................................................................3

1.1.2 Online Access to Manuals ..........................................................................................................3

1.1.3 Conventions Used in This Manual ..............................................................................................3

1.2 PRODUCT DESCRIPTION...................................................................................................4

1.2.1 Model Offerings ..........................................................................................................................6

1.2.2 GE MDS P23 Protected Network (Redundant) Configuration ....................................................7

1.2.3 External GPS PPS Option ..........................................................................................................7

1.3 APPLICATIONS ....................................................................................................................7

1.3.1 Mobile/Fixed Data System .........................................................................................................8

1.3.2 Wireless LAN ..............................................................................................................................8

1.3.3 Point-to-Point LAN Extension .....................................................................................................9

1.3.4 Serial Radio Network Connectivity .............................................................................................9

1.3.5 Multiple Protocols and/or Services ...........................................................................................10

1.3.6 Wireless LAN with Mixed Services ...........................................................................................11

1.3.7 Upgrading Older Wireless Network with Serial Interfaces ........................................................12

1.4 NETWORK DESIGN CONSIDERATIONS.......................................................................... 12

1.4.1 Extending Network Coverage with Repeaters ..........................................................................12

1.4.2 Protected Network Operation using Multiple Access Points .....................................................14

1.4.3 Collocating Multiple Radio Networks ........................................................................................15

1.5 GE MDS CYBER SECURITY SUITE..................................................................................16

1.6 ACCESSORIES.................................................................................................................. 17

2 TABLETOP EVALUATION AND TEST SETUP....... 19

2.1 OVERVIEW.........................................................................................................................21

2.2 STEP 1

2.3 STEP 2

05-4446A01, Rev. C Mercury Reference Manual i

—

CONNECT THE ANTENNA PORTS................................................................... 21

—

CONNECT THE PRIMARY POWER ..................................................................22

2.4 STEP 3

2.5 STEP 4

2.5.1 Getting Started .........................................................................................................................23

2.5.2 Procedure .................................................................................................................................23

2.5.3 Basic Configuration Defaults ....................................................................................................23

2.6 STEP 5

2.7 STEP 6

—

CONNECT PC TO THE TRANSCEIVER............................................................ 23

—

REVIEW TRANSCEIVER CONFIGURATION.................................................... 23

—

CONNECT LAN OR SERIAL DATA EQUIPMENT.............................................. 24

—

CHECK FOR NORMAL OPERATION.................................................................26

3 EMBEDDED MANAGEMENT SYSTEM................... 29

3.1 MS INTRODUCTION.......................................................................................................... 31

3.1.1 Differences in the User Interfaces ............................................................................................31

3.2 ACCESSING THE MENU SYSTEM ...................................................................................33

3.2.1 Methods of Control ...................................................................................................................34

3.2.2 PC Connection and Log In Procedures ....................................................................................34

3.2.3 Navigating the Menus ...............................................................................................................38

3.3 BASIC OVERVIEW OF OPERATION.................................................................................40

3.3.1 Starting Information Screen ......................................................................................................40

3.3.2 Main Menu ................................................................................................................................42

3.4 CONFIGURING NETWORK PARAMETERS .....................................................................43

3.4.1 Network Configuration Menu ....................................................................................................43

3.4.2 Ethernet Port Configuration Menu ............................................................................................51

3.4.3 Bridge Configuration .................................................................................................................52

3.4.4 SNMP Agent Configuration .......................................................................................................53

3.4.5 AP Location Push Config Menu ................................................................................................55

3.4.6 SNTP Server Configuration ......................................................................................................57

3.5 RADIO CONFIGURATION.................................................................................................. 58

3.5.1 Radio Configuration Menu .......................................................................................................58

3.5.2 Serial Port Configuration ..........................................................................................................67

3.6 MODBUS / TCP SERVER CONFIGURATION ................................................................... 80

3.6.1 Modbus/TCP in Mercury Transceivers

3.6.2 Menu Selections .......................................................................................................................80

An Overview .............................................................80

—

3.7 SECURITY CONFIGURATION MENU............................................................................... 85

3.7.1 Device Security Menu ..............................................................................................................86

3.7.2 Wireless Security Menu ............................................................................................................87

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Mercury Reference Manual 05-4446A01, Rev. C

3.7.3 IEEE 802.1x Device Authentication ..........................................................................................89

3.7.4 Manage Certificates .................................................................................................................91

3.8 REDUNDANCY CONFIGURATION (AP ONLY)................................................................. 93

3.9 GPS CONFIGURATION (REMOTE ONLY)........................................................................98

3.10 DEVICE INFORMATION MENU.....................................................................................100

3.11 PERFORMANCE INFORMATION MENU....................................................................... 101

3.12 MAINTENANCE/TOOLS MENU..................................................................................... 113

3.12.1 Auto Firmware Upgrade Menu (AP Only) .............................................................................124

3.13 PERFORMANCE OPTIMIZATION.................................................................................. 127

3.13.1 Proper Operation

—

What to Look For ......................................................................... 129

4 TROUBLESHOOTING & RADIO

MEASUREMENTS.................................................. 133

4.1 TROUBLESHOOTING......................................................................................................135

4.1.1 Interpreting the Front Panel LEDs ..........................................................................................135

4.1.2 Troubleshooting Using the Embedded Management System ................................................136

4.1.3 Using Logged Operation Events ............................................................................................139

4.1.4 Alarm Conditions ....................................................................................................................140

4.1.5 Correcting Alarm Conditions ...................................................................................................141

4.1.6 Logged Events .......................................................................................................................142

4.2 RADIO (RF) MEASUREMENTS....................................................................................... 143

4.2.1 Antenna System SWR and Transmitter Power Output ...........................................................143

For Directional Antennas ...........................................................................144

4.2.2 Antenna Aiming

—

5 PLANNING A RADIO NETWORK.......................... 147

5.1 INSTALLATION PLANNING ............................................................................................. 149

5.1.1 General Requirements ...........................................................................................................149

5.1.2 Site Selection .........................................................................................................................151

5.1.3 Terrain and Signal Strength ....................................................................................................151

5.1.4 Antenna & Feedline Selection ................................................................................................151

5.1.5 How Much Output Power Can be Used? ...............................................................................155

5.1.6 Conducting a Site Survey .......................................................................................................155

05-4446A01, Rev. C Mercury Reference Manual iii

5.1.7 A Word About Radio Interference ...........................................................................................156

5.2 dBm-WATTS-VOLTS CONVERSION CHART..................................................................158

-

6 TECHNICAL REFERENCE..................................... 159

6.1 DATA INTERFACE CONNECTORS .................................................................................161

6.1.1 LAN Port .................................................................................................................................161

6.1.2 COM1 Port .............................................................................................................................162

6.2 SPECIFICATIONS............................................................................................................ 162

6.3 NOTES ON SNMP............................................................................................................165

6.3.1 Overview ................................................................................................................................165

7 GLOSSARY OF TERMS & ABBREVIATIONS....... 169

Copyright Notice

This publication is protected by U.S.A. copyright law. Copyright 2008, GE MDS. All rights
reserved.

ISO 9001 Registration

GE MDS adheres to the 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.

Related Materials on the Internet

tion notes, firmware upgrades and other updated information is available on the GE MDS Web site
at www.GEmds.com.

About GE MDS

—Data sheets, frequently asked questions, case studies, applica-

Over two decades ago, GE MDS began building radios for business-critical applications. Since
then, we have installed thousands of radios in over 110 countries. To succeed, we overcame
impassable 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 most critical assets.

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Mercury Reference Manual 05-4446A01, Rev. C

The majority of GE MDS radios deployed since 1985 are still installed and performing within our

customers’ 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.

Our durable products and comprehensive solutions has made GE MDS the wireless leader in indus-

trial automation—including oil and gas production and transportation, water/wastewater treat-

ment, 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 cus­tomers 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 GE MDS. We’ll always put
the performance of your network above all. Visit us at www.GEmds.com for more information.

OPERATIONAL & SAFETY NOTICES

RF Exposure

Professional installation required. The transceiver described here emits radio frequency
energy. Although the power level is low, the concentrated energy from a directional
antenna may pose a health hazard. Do not allow people to come closer than 20 cm

(7.87 inches) to the antenna when the transmitter is operating. This calculation is
based on an 18 dBi panel antenna. Additional information on RF exposure is on the

Internet at

www.fcc.gov/oet/info/documents/bulletins

.

ERP Compliance

To maintain regulatory compliance for Effective Radiated Power (ERP) of 1-Watt per MHz, the
following table of transmit power settings must be observed for the listed bandwidths and antenna
types approved. Consult the factory for other antenna options of lower gain.

CSA/

This product is approved 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
the National Electrical Code.

The transceiver has been recognized for use in these hazardous locations by the Canadian Standards Association
(CSA) which also issues the US mark of approval (CSA/
C22.2 No. 213-M1987.

05-4446A01, Rev. C Mercury Reference Manual v

Notice

us

NFPA 70

). The CSA Certification is in accordance with CSA STD

US

, otherwise known as

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 haz­ardous 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.

EXPLOSION

HAZARD!

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 Mercury
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 a Mercury Series installation not
exceed 36 dBm. Refer to

Antenna & Feedline Selection

on Page 151 for more information.

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 Cus­tomer 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 dissem­ination 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.

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Mercury Reference Manual 05-4446A01, Rev. C

PRODUCT OVERVIEW

1

1 Chapter Counter Reset Paragraph

Contents

1.1 ABOUT THIS MANUAL............................................................... 3

1.2 PRODUCT DESCRIPTION .........................................................4

1.3 APPLICATIONS........................................................................... 7

AND APPLICATIONS

1.1.1 Start-Up Guide ..............................................................................3

1.1.2 Online Access to Manuals .............................................................3

1.1.3 Conventions Used in This Manual ................................................3

1.2.1 Model Offerings .............................................................................6

1.2.2 GE MDS P23 Protected Network (Redundant) Configuration .......7

1.2.3 External GPS PPS Option .............................................................7

1.3.1 Mobile/Fixed Data System ............................................................8

1.3.2 Wireless LAN ................................................................................8

1.3.3 Point-to-Point LAN Extension ........................................................9

1.3.4 Serial Radio Network Connectivity ................................................9

1.3.5 Multiple Protocols and/or Services ..............................................10

1.3.6 Wireless LAN with Mixed Services ..............................................11

1.3.7 Upgrading Older Wireless Network with Serial Interfaces ..........12

1.4 NETWORK DESIGN CONSIDERATIONS ................................ 12

1.4.1 Extending Network Coverage with Repeaters ............................12

1.4.2 Protected Network Operation using Multiple Access Points .......14

1.4.3 Collocating Multiple Radio Networks ...........................................15

1.5 GE MDS CYBER SECURITY SUITE ........................................16

1.6 ACCESSORIES......................................................................... 17

05-4446A01, Rev. C Mercury Reference Manual 1

2 Mercury Reference Manual 05-4446A01, Rev. C

1.1 ABOUT THIS MANUAL

This Reference Manual is one of two publications provided for users of

the Mercury SeriesTM transceiver system. It contains detailed product
information, an overview of common applications, a screen-by-screen
review of the menu system, technical specifications, suggested settings
for various scenarios, and detailed troubleshooting information. This
manual should be available to all personnel responsible for network
design, setup, commissioning and troubleshooting.

1.1.1 Start-Up Guide

The Mercury Series Start-Up Guide (Part No. 05-4558A01) is a com-

panion publication to the Reference Manual. It is a smaller book, with a
specific purpose—to guide an installer in the basic steps for getting a
transceiver on the air and communicating with other units in a network.
It provides only the essential information installers require for getting
their equipment up and running in the shortest time possible.

1.1.2 Online Access to Manuals

In addition to printed manuals, many users need access to documents
electronically. This is especially useful when you need to access docu­mentation while traveling, or want to share a document with another
user in the field. Electronic documents also allow searching for a spe­cific term or subject, especially in larger manuals.

Access manuals for our equipment anytime from our Web site at

www.GEmds.com. Simply click the Downloads tab at the top of the home

page and select Product Manuals from the drop-down list. A search
window appears to help you locate the manual you need.

®

Online manuals are provided as PDF files in the Adobe

Acrobat® stan-

dard. If necessary, download the free reader for PDF files from

www.adobe.com.

1.1.3 Conventions Used in This Manual

On-Screen Menu Items

On-screen menu items or command entries are presented in a distinctive
font to set them apart from regular text (for example:

Address, Password). You will find this font most often in Chapter 3,

where the menu system is discussed in detail. When variable settings or
a range of options are available for a menu option, the items are pre­sented inside brackets, with the default setting (if any) shown last after
a semicolon:

[

available settings or range; default setting]

Network Name, IP

05-4446A01, Rev. C Mercury Reference Manual 3

Menu Strings

To help show the path to a menu selection, navigation strings are used
in several places in this manual. For example, suppose you want to view
or set the Network Name assigned to your system. This item is located
in the Network Configuration Menu, so the navigation string in the text
would appear as shown:

Main Menu>>Network Configuration>>Net work Name

By following this order of menus, you can quickly reach the desired
menu.

1.2 PRODUCT DESCRIPTION

The GE MDS Mercury SeriesTM transceiver is an easy-to-install wireless
solution offering extended range, secure operation, and multi-megabit
performance in a compact and rugged package. The transceiver is ide­ally suited for demanding applications in fixed or mobile environments,
where reliability and range are paramount.

The transceivers are commonly used to convey text documents,
graphics, e-mail, video, Voice over IP (VoIP), and a variety of other
application data between mobile, fixed-point, and WAN/LAN-based
entities.

Based on multi-carrier Orthogonal Frequency Division Multiplexing
(OFDM), the transceiver features high speed/low latency, basic Quality
of Service (QoS) for prioritizing traffic, Ethernet and serial encapsula­tion, and network roaming. It also provides enhanced security features
including AES encryption and IEEE 802.1x Device Authentication,
making the Mercury system the best combination of security, range, and
speed of any industrial wireless solution on the market today.

Invisible place holder

Figure 1-1. The GE MDS Mercury SeriesTM Transceiver

(Remote unit shown, AP is similar in appearance)

Rugged Packaging

The transceivers are housed in a compact and rugged die cast-aluminum
case that need only be protected from direct exposure to the weather.

4 Mercury Reference Manual 05-4446A01, Rev. C

This one enclosure contains all necessary components for radio opera­tion and data communications.

Simple Installation Mercury Transceivers are designed for rapid and trouble-free installa-

tion. For basic services, you simply connect the antennas (900 MHz and
GPS, as required), connect your data equipment, apply primary power,
and set some operating parameters. No license is required for operation
in the USA, Canada, and many other countries. Check requirements for
your region before placing the equipment into service.

Most installations employ an omni-directional antenna at the Access
Point (AP) location and mobile stations. Fixed Remote stations often
employ a directional antenna aimed at the AP. Regardless of the type
used, antennas are a vital part of the system and must be chosen and
installed correctly. Refer to INSTALLATION PLANNING on

Page 149 for guidance on choosing suitable antennas and installation

sites.

Secure Operation Data network security is a vital issue in today’s wireless world. Mercury

transceivers provide multiple tools to help you build a network that min-

imizes 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 channels, and password protection.

Security is not a one-step process that can simply be turned on and for­gotten. It must be practiced and enforced at multiple levels,

24 hours-a-day and 7 days-a-week. See “GE MDS CYBER SECURITY

SUITE” on Page 16 for more information about the transceiver’s secu-

rity tools.

Robust Radio
Operation

The transceivers are designed for operation in the license-free 900 MHz
Industrial, Scientific, and Medical (ISM) band. They provide reliable
communications over long distances, even in the presence of weak sig­nals or interference.

Mobile range depends on many factors, including terrain, building den­sity, antenna gain, and speed of travel. The unit is designed for suc­cessful application in a variety of mobile environments, and offers the
best combination of range, speed and robustness available in an indus­trial wireless package today. By using multiple Access Points, a network
can be created that provides consistent, reliable coverage over a large

metropolitan area. See “SPECIFICATIONS” on Page 162 for more

information on transmission range.

Flexible Services Users with a mix of equipment having Ethernet and serial data interfaces

can use this equipment via a Remote transceiver. The transceiver pro­vides services in data networks that are migrating from legacy
serial/EIA-232-based hardware to the faster and more easily interfaced
Ethernet protocol.

05-4446A01, Rev. C Mercury Reference Manual 5

Flexible
Management

You can locally or remotely configure, commission, troubleshoot, and
maintain the transceiver. Four different modes of access are available:
local RS-232 console terminal, local or remote IP access (via Telnet or
SSH), web browser (HTTP, HTTPS), and SNMP (v1/v2/v3).

The text-based interfaces (RS-232 console, Telnet, and SSH) are imple­mented in the form of easy-to-follow menus, and the terminal server
provides a wizard to help you configure the units correctly.

Transceiver
Features

The transceiver’s design makes the installation and configuration easy,
while allowing for future changes.

• Industrial-Grade Product—Extended temperature range for
trouble-free operation in extreme environments.

• Robust Radio Communications—Designed to operate over long
distances in dense, high-interference environments.

• Robust Network Security—Prevents common attack schemes
and hardware from gaining access or control of the network.
Common attack events are logged and reported by alarms.

• High Speed—1.5 Mbps is over 100-times faster than 9.6 kbps
radios.

• Plug-and-Play Connectivity—AP or Remote configuration
requires minimal setup.

• Built-in GPS Receiver—GPS technology is used for timing and
location data. The only external equipment needed for this func­tionality is a GPS antenna (several types are available from GE
MDS).

1.2.1 Model Offerings

The transceiver comes in two primary models—Access Point and
Remote. Unique hardware is used for each model. Of the Remote radios,

there are two sub-types available—Standard Remote and Max
Remote, both of which support Ethernet and serial services. Table 1-1

summarizes each radio’s interface services.

Table 1-1. Transceiver Models and Data Interface Services

Model Sub-Type

Access Point N/A Yes Yes No No
Remote Standard Remote Yes Yes No No

Max Remote Yes Yes Yes Yes

NOTES

1.COM1 provides access to the embedded Management System for all units.

Ethernet/LAN

1

COM1

1

USB Integrated WiFi

Access Point or Remote?—Identification Tip

The outward appearance of AP and Remote radios is nearly identical,

however, the hardware for each type is different and they are not inter-

changeable. An quick way to identify them is to observe the color of the

6 Mercury Reference Manual 05-4446A01, Rev. C

gasket seal in the center of the radio case. APs have a black gasket,
while Remote units have a yellow gasket.

In addition to gasket color, a label on the top of each radio identifies it
as an AP or Remote unit. If the label shows an –A suffix, it is an AP. If
it shows a –R suffix, it is a Remote.

1.2.2 GE MDS P23 Protected Network (Redundant)
Configuration

For mission-critical applications, a Protected Network Station is also
offered. This unit incorporates two Access Points, 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 the
protected chassis. For system-level information on this product, refer to
MDS publication 05-4161A01.

Invisible place holder

Figure 1-2. MDS P23 Protected Network Station

(incorporates two transceivers, with automatic switchover)

1.2.3 External GPS PPS Option

The External GPS Precise Positioning Service (PPS) option allows for
an external GPS device to provide the PPS input to the Mercury. This is
useful in installations where multiple radios require GPS timing. This
option prevents each Mercury from requiring its own GPS antenna.

Refer to the electrical specifications in the External GPS PPS Option

section on Page 164. This option is only available in hardware revision

1.0.2 or later.

1.3 APPLICATIONS

The following sections provide illustrations of typical transceiver instal­lations. This is an overview only. A Network Administrator should be
involved in all installation planning activities.

05-4446A01, Rev. C Mercury Reference Manual 7

Mercury AP

C

)

C

)

M

DS NETview MS®

Mercury

Computer

Server
(Ethernet)

Control Center

WAN

Mercury

remote

Router

1.3.1 Mobile/Fixed Data System

Mercury transceivers support high-speed data communications in a
mobile environment. In this application, Remote radios “roam” between
different Access Points, providing seamless transitions and continuous
coverage throughout a municipal area. Figure 1-3 shows an example of
an integrated system employing both mobile and fixed Mercury trans­ceivers.

Invisible place holder

remote

Video

RTU/PLC
(Ethernet)

Long Range WLAN

MDS 4790

Master Radio

Licensed Serial/IP Integration

Mercury

remote

Mercury
remote

RS-232

Mobile DataMobile Data

Figure 1-3. Integrated Mobile/Fixed Application

Surveillance

MDS 4710

MDS 4710

RS-232

RS-232

RTU/PL

(Serial

RTU/PL

(Serial

1.3.2 Wireless LAN

The wireless LAN is a common application of the transceiver. It consists
of a central control station (Access Point) and one or more associated
Remote units, as shown in Figure 1-4. 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 communicates
with all 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 communicate over-the-air to an Access
Point (AP). Peer-to-peer communications between Remotes can only
take place indirectly via the AP. In the same fashion, an AP can only
communicate 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.

8 Mercury Reference Manual 05-4446A01, Rev. C

Invisible place holder

Remote

R

LAN

Remote

emote

LAN

LAN

WAN/LAN

Access Point

Remote

LAN

Figure 1-4. Typical Wireless LAN

1.3.3 Point-to-Point LAN Extension

A point-to-point configuration (Figure 1-5) is a simple arrangement
consisting of an Access Point and a Remote unit. This provides a com­munications link for transferring data between two locations.

Invisible place holder

Access Point

Remote

LAN/WAN

LAN

Figure 1-5. Typical Point-to-Point Link

1.3.4 Serial Radio Network Connectivity

The transceiver provides a path for serial devices to migrate to
IP/Ethernet systems. 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 infrastructure to migrate to an IP format.

A Remote transceiver with its serial port connected to a GE MDS
serial-based radio, such as the MDS x790/x710, MDS TransNET and
others, provides a path for bringing the data from the older radio into the
IP/Ethernet environment of a Mercury-based system.

05-4446A01, Rev. C Mercury Reference Manual 9

Invisible place holder

N

N

Serial Conn.

MDS 4710 Remote

Serial

Device

NETWORK

ROUTER

MS Control

Point

HUB

ROUTER

SCADA Host

Modbus/IP

Access Point

Remote Serial

Remote Serial

Remote Serial

Serial Conn.

Serial Conn.

MDS 4790

Master

MDS 9790

Master

MDS 9810

MDS 4710 Remote

MDS 9710 Remote

MDS 9710 Remote

MDS 9810 Remote

Master

MDS 9810 Remote

Serial

Device

Serial

Device

Serial

Device

Serial

Device

Serial

Device

Figure 1-6. Backhaul Network

1.3.5 Multiple Protocols and/or Services

Prior to the introduction of Ethernet/IP-based radios, two radios were
often used to service two different types of devices (typically connected
to different SCADA hosts). A Mercury radio provides this capability
using a single remote unit. The unit’s serial port can be connected via IP
to different SCADA hosts, transporting different (or the same) proto­cols. Both data streams are completely independent, and the transceiver
provides seamless simultaneous operation as shown in Figure 1-7.

Invisible place holder

Remote Serial

SCADA Host
Modbus/IP

HUB

HUB

Access Point

Remote Serial

WAN

ETview

ROUTER

HUB

HUB

SCADA Host

Total Flow

Access Point

Remote Serial

Figure 1-7. Multiple Protocol Network

RTU

EIA-232

Flow Meter

EIA-232

EIA-232

EIA-232

EIA-232

EIA-232

Serial

Device

Serial

Device

Serial

Device

Serial

Device

10 Mercury Reference Manual 05-4446A01, Rev. C

By using a single radio, the cost of deployment is cut in half. Beyond

N

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 provides the poten­tial for future applications that run over Ethernet and IP, such as video
for remote surveillance.

1.3.6 Wireless LAN with Mixed Services

The 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 provide service to relatively small

areas such as offices, warehouses and homes. They provide high data
rates but have limited range. The Mercury transmits at a higher power
level, uses a different frequency band, has higher sensitivity, and a nar­rower channel to concentrate the radio energy, reaching farther dis­tances. It is designed for industrial operation from the ground up.

IP-based devices that may be used with the transceiver include new,
powerful Remote Terminal 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 1-8 shows a typ­ical wireless IP network.

Invisible place holder

Remote Bridge

Access Point

Remote Bridge

MS Control

Point

SCADA Host

Modbus/IP

Printer

Figure 1-8. Extended-Range LAN with Mixed Applications

IP Camera

IP/Ethernet

IP/Ethernet

IP/Ethernet

05-4446A 01, Rev. C Mercury Reference Manual 11

1.3.7 Upgrading Older Wireless Network with Serial
Interfaces

Millions of wireless data products have been installed in the last two
decades for licensed and license-free operation, many of them manufac­tured by GE MDS. There are several ways that these systems can benefit

from incorporating Mercury equipment. The chief advantages are inter-

face flexibility (serial and Ethernet in one unit), and higher data
throughput. By taking advantage of its built-in serial and Ethernet inter­faces, the transceiver is well suited to replace leased lines, dial-up lines,
or existing 900 MHz “multiple address” data transceivers.

Replacing Legacy Wireless Products

In most cases, legacy radio transceivers supporting serial-interface
equipment can be replaced with Mercury transceivers. Legacy equip­ment can be connected to the transceiver through the COM1 port with a
DB-25 to DB-9 cable wired for EIA-232 signaling. The COM1 port acts
as a Data Communications Equipment (DCE) port.

NOTE: Several previous GE MDS-brand products had non-standard

signal lines on their interface connectors (for example, to
control sleep functions and alarm lines). These special func­tions are not provided nor supported by the Mercury trans­ceiver. Consult equipment manuals for complete pinout
information.

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 repeater)

Although the range between fixed transceivers can be up to 40 km (25
miles) over favorable terrain, it is possible to extend the range consider­ably by connecting two units together at one site in a “back-to-back”
fashion, creating repeater as shown in Figure 1-9. Use this arrangement
whenever the objective is to utilize the maximum range between sta-

12 Mercury Reference Manual 05-4446A01, Rev. C

tions. In this case, using high-gain Yagi antennas at each location pro-

e

vides more reliable communications than their counterparts—
omnidirectional antennas.

Invisible place holder

Overview

Remot

LAN

Remote

LAN

POINT-TO-POINT LINK

Remote

LAN/WAN

Access
Point

REPEATER

Access
Point

Ethernet

Crossover Cable

Remote

LAN

Figure 1-9. Typical LAN with a Repeater Link

Two transceivers may be connected “back-to-back” through the LAN
ports to form a repeater station. If the transceivers are connected directly
to each other, you must use an Ethernet cross-over cable. This configu­ration is sometimes required in a network that includes a distant Remote
that would otherwise be unable to communicate directly with the Access
Point station due to distance or terrain.

The geographic location of a repeater station is especially important.

Choose a site that allows good communication with both the Access

Point and the outlying Remote site. This is often on top of a hill,
building, or other elevated terrain from which both sites can be “seen”
by the repeater station antennas. A detailed discussion on the effects of

terrain is given in Section 5.1.2, Site Selection (beginning on Page 151).

The following paragraphs contain specific requirements for repeater
systems.

Antennas Two antennas are required at this type of repeater station—one for each

radio. You must take measures to minimize the chance of interference
between these antennas. One effective technique for limiting interfer-

ence is to employ vertical separation. In this arrangement, assuming
both antennas are vertically polarized, one antenna is mounted directly

over the other, separated by at least 10 feet (3 meters). This takes advan­tage of the minimal radiation exhibited by most antennas directly above
and below their driven elements.

Another interference reduction technique is to cross-polarize the
repeater antennas. If one antenna is mounted for polarization in the ver­tical plane, and the other in the horizontal plane, an additional 20 dB of
attenuation is achieved. The corresponding stations should use the same
antenna orientation when cross-polarization is used.

Network Name The two radios that are wired together at the repeater site must have dif-

ferent network names. For information on how to set or view the net-

05-4446A01, Rev. C Mercury Reference Manual 13

work names, see “STEP 3—CONNECT PC TO THE TRANSCEIVER”

on Page 23.

TDD Sync Mode To avoid interference between the two APs that form a repeater station,

they should be synchronized so that they will transmit at the same time
and receive at the same time. This eliminates the possibility of one AP
transmitting while another is trying to receive.

This can be accomplished by setting the

Frequency Configuration menu to GPS Required. See Frequency Control

TDD Sync Mode parameter in the

Menu on Page 60 for details.

Option 2—Using the AP as a Store-and-Forward Packet
Repeater

You can extend a wireless network by using the Access Point as a
repeater to re-transmit the signals of all stations in the network. (See

Figure 1-10 on Page 14.)

Invisible place holder

Remote

LAN/WAN

Remote

Access Point

REPEATER

Remote

Remote

LAN

LAN

LAN

Figure 1-10. Typical Store-and-Forward Repeater Arrangement

As with the conventional repeater described in Option 1 above, the loca­tion of a store and forward repeater is also important. A site must be

chosen that allows good communication with both the Access Point and

the outlying Remote site. This can be on the top of a hill, building, or
other elevated terrain from which all sites can be “seen” by the repeater
station antenna. A detailed discussion on the effects of terrain is given

in Section 5.1.2, Site Selection (beginning on Page 151).

1.4.2 Protected Network Operation using Multiple
Access Points

Although GE MDS transceivers have a very robust design and have
undergone intensive testing before being shipped, it is possible for iso­lated failures to occur. In mission-critical applications, down time can
be virtually eliminated by using some, or all, of the following configu­rations:

In a point-to-multipoint scenario, the Access Point services multiple
remotes. A problem in the Access Point will have an effect on all
remotes, since none will have access to the network. When operation of
the network does not tolerate any down time, it is possible to set up a

14 Mercury Reference Manual 05-4446A01, Rev. C

protected configuration for the Access Point to greatly reduce the possi­bility of this occurrence.

Two or more Access Points can be configured identically, each with its
own independent antenna. In this scenario, Remotes will associate with
one of the available Access Points. In case of a failure of that AP, the
Remotes will quickly associate with another Access Point, re-estab­lishing connectivity to the end devices. Because only one Access Point
operates at any given time, collisions between APs is not possible.

1.4.3 Collocating Multiple Radio Networks

Many networks can operate in relatively close physical proximity to one
another provided reasonable measures are taken to assure the radio
signal of one Access Point is not directed at the antenna of the second

Access Point.

The Network Name and the Association Process

The Network Name is the foundation for building individual radio net­works. Remotes in a network with the same network name as an Access
Point (AP) unit are “associated” with that AP.

Co-Location for
Multiple Networks

The use of a different Network Name does not guarantee an interfer­ence-free system. It does, however, assure that only data destined for a
unique network is passed through to that network.

It may be desirable to co-locate Access Points at one location to take
advantage of an excellent location that can serve two independent net­works. Configure each network with a unique Network Name, and
install each AP’s antenna with at least 10 feet of vertical separation to
minimize RFI.

To co-locate APs, configure them with Time Division Duplex (TDD)
Sync set to

GPS Required. Configure all APs that are within range of each

other with the same pattern, but with a unique Hop Pattern Offset. For

more information, see “Frequency Control Menu” on Page 60.

NOTE: Transceivers are shipped with the Network Name set to

MDS-Mercury as a factory default.

Can radio frequency interference (RFI) disrupt my wireless
network?

When multiple radio networks operate in close physical proximity to
other wireless networks, individual units may not operate reliably under
weak signal conditions and may be influenced by strong radio signals on
adjacent bands. This radio frequency interference cannot be predicted
with certainty, and can only be determined by experimentation. If you
need to co-locate two units, start by using the largest possible vertical

antenna separation between the two AP antennas on the same support

05-4446A01, Rev. C Mercury Reference Manual 15

structure. If that does not work, consult with your factory representative
about other techniques for controlling radio frequency interference

between the radios. (See “A Word About Radio Interference” on

Page 156 for more details.)

1.5 GE MDS CYBER SECURITY SUITE

Today, the operation and management of an enterprise is increasingly
dependent on electronic information flow. An accompanying concern
becomes the cyber security of the communication infrastructure and the
security of the data itself.

The transceiver is capable of dealing with many common security
issues. Table 1-2 profiles security risks and how the transceiver provides
a solution for minimizing vulnerability.

Table 1-2. Security Risk Management

Security Vulnerability GE MDS Cyber Security Solution

Unauthorized access to the backbone
network through a foreign remote radio

“Rogue” AP, where a foreign AP takes
control of some or all remote radios and
thus remote devices

Dictionary attacks, where a hacker runs a
program that sequentially tries to break a
password.

Denial of service, where Remote radios
could be reconfigured with bad
parameters, bringing the network down.

Airsnort and other war-driving hackers in
parking lots, etc.

Eavesdropping, intercepting messages

• IEEE 802.1x device authentication

• Approved Remotes List (local)

Only those remotes included in the
AP list will associate

• IEEE 802.1x device authentication

• Approved AP List

A remote will only associate to those
APs included in its local authorized
list of APs

• Failed-login lockdown

After five tries, the transceiver
ignores login requests for 5 minutes.
Critical event reports (traps) are
generated as well.

•Remote login with SSH or HTTPS

•Local console login

•Disabled HTTP and Telnet to allow

only local management services

•900 MHz operation is not

interoperable with standard 802.11
wireless cards

•The transceiver cannot be put in a

promiscuous mode

•Proprietary data framing

•AES-128 encryption

16 Mercury Reference Manual 05-4446A01, Rev. C

Table 1-2. Security Risk Management

Security Vulnerability GE MDS Cyber Security Solution

Unprotected access to configuration via
SNMPv1

Intrusion detection

•Implement SNMPv3 secure

operation

• Provid e s ear ly warnin g vi a SN MP

through critical event reports
(unauthorized, logging attempts,
etc.)

• Unauthorized AP MAC address

detected at Remote

• Unauthorized Remote MAC

address detected at AP

• Login attempt limit exceeded

(Accessed via: Telnet, HTTP, o r
local)

• Successful login/logout

(Accessed via: Telnet, HTTP, o r
local)

1.6 ACCESSORIES

The transceiver can be used with one or more of the accessories listed in

Table 1-3. Contact the factory for ordering details.

Table 1-3. Accessories

Accessory Description GE MDS

Part No.

AC Power
Adapter Kit

Omni­Directional
Antennas

Yagi Antenna
(Directional)

GPS Receiving
Antennas

TNC Male-to-N
Female Adapter

TNC Male-to-N
Female Adapter
Cable

Ethernet RJ-45
Crossover
Cable (CAT5)

A small power supply module designed for
continuous service. UL approved. Input:
120/220; Output: 13.8 Vdc @ 2.5 A

Rugged antennas well suited for use at Access
Point installations. Consult with your factory
Sales Representative for details

Rugged antennas well suited for use at fixed
Remote sites. Consult with your factory Sales
Representative for details.

A variety of fixed and mobile GPS antennas
(active and passive) are available. Consult with
your factory Sales Representative for details.

One-piece RF adaptor plug. 97-1677A161

Short length of coaxial cable used to connect the
radio’s TNC antenna connector to a Type N
commonly used on large diameter coaxial
cables.

Cable assembly used to cross-connect the
Ethernet ports of two transceivers used in a
repeater configuration.
(Cable length ≈ 3 ft./1M)

01-3682A02

--

--

--

97-1677A159
(3 ft./1m)

97-1677A160
(6 ft./1.8m)

97-1870A21

05-4446A01, Rev. C Mercury Reference Manual 17

Table 1-3. Accessories (Continued)

Accessory Description GE MDS

Part No.

2-Pin Power
Plug

Ethernet RJ-45
Straight-thru
Cable (CAT5)

EIA-232
Shielded Data
Cable

EIA-232
Shielded Data
Cable

Flat-Surface
Mounting
Brackets &
Screws

Fuse Internal fuse, 5.0 Ampere 29-1784A04
DIN Rail

Mounting
Bracket

COM1 Interface
Adapter

Bandpass Filter Antenna system filter that helps eliminate

Ethernet Surge
Suppressor

Mates with power connector on transceiver.
Screw terminals provided for wires, threaded
locking screws to prevent accidental disconnect.

Cable assembly used to connect an Ethernet
device to the transceiver. Both ends of the cable
are wired identically.
(Cable length ≈ 3 ft./1M)

Shielded cable terminated with a DB-25 male
connector on one end, and a DB-9 female on the
other end. Two lengths available (see part
numbers at right).

Shielded cable terminated with a DB-9 male
connector on one end, and a DB-9 female on the
other end, 6 ft./1.8m long.

Brackets: 2″ x 3″ plates designed to be screwed
onto the bottom of the unit for surface-mounting
the radio.

Bracket screws: 6-32/1/4″ with locking
adhesive. (Industry Standard MS 51957-26)

Bracket used to mount the transceiver to
standard 35 mm DIN rails commonly found in
equipment cabinets and panels.

DB-25(F) to DB-9(M) shielded cable assembly
(6 ft./1.8 m) for connection of equipment or other
EIA-232 serial devices previously connected to
“legacy” units. (Consult factory for other lengths
and variations.)

interference from nearby paging transmitters.
Surge suppressor for protection of Ethernet port

against lightning.

73-1194A39

97-1870A20

97-3035L06
(6 ft./1.8m)

97-3035L15
(15 ft./4.6m)

97-1971A03

82-1753-A01

70-2620-A01

03-4022A03

97-3035A06

20-2822A02

29-4018A01

18 Mercury Reference Manual 05-4446A01, Rev. C

TABLETOP EVALUATION

2

2 Chapter Counter Reset Paragraph

Contents

2.1 OVERVIEW ............................................................................... 21

2.2 STEP 1—CONNECT THE ANTENNA PORTS......................... 21

2.3 STEP 2—CONNECT THE PRIMARY POWER......................... 22

2.4 STEP 3—CONNECT PC TO THE TRANSCEIVER.................. 23

2.5 STEP 4—REVIEW TRANSCEIVER CONFIGURATION........... 23

2.6 STEP 5—CONNECT LAN OR SERIAL DATA EQUIPMENT.... 24

AND TEST SETUP

2.5.1 Getting Started ............................................................................23

2.5.2 Procedure ....................................................................................23

2.5.3 Basic Configuration Defaults .......................................................23

2.7 STEP 6—CHECK FOR NORMAL OPERATION....................... 26

05-4446A01, Rev. C Mercury Reference Manual 19

20 Mercury Reference Manual 05-4446A01, Rev. C

2.1 OVERVIEW

)

GE MDS recommends that you set up a “tabletop network” to verify the
basic operation of the transceivers. This allows experimenting with net­work designs, configurations, or network equipment in a convenient
location. This test can be performed with any number of radios.

When you are satisfied that the network is functioning properly in a
benchtop setting, perform the field installation. Complete information
for field installation, including mounting dimensions and antenna selec­tion, is provided in INSTALLATION PLANNING on Page 149.

NOTE: It is important to use a “Network Name” that is different from

any currently in use in your area during the testing period.

To simulate data traffic over the radio network, connect a PC or LAN to

the Ethernet port of the Access Point and PING each transceiver several

times.

2.2 STEP 1—CONNECT THE

ANTENNA PORTS

Figure 2-1 shows the tabletop arrangement. Connect the antenna ports

of each transceiver as shown. This provides stable radio communica­tions between each unit and prevents interference to nearby electronic
equipment.

Invisible place holder

Remote

POWER ATTENUATORS

• Fixed or adjustable

• 2W Minimum Rating

Access Point

NON-RADIATING ATTENUA TORS

COMPUTER

POWER DIVIDER

• Install on unused divider ports (if any

• 2W Minimum Rating

Figure 2-1. Typical Setup for Tabletop-Testing of Radios

Remote

Remote

05-4446A01, Rev. C Mercury Reference Manual 21

NOTE: Use attenuation between all units in the test setup. The amount

of attenuation required depends on the number of units tested
and the desired signal strength (RSSI) at each transceiver
during the test. In no case should a signal greater than –50 dBm
be applied to any transceiver in the test setup. GE MDS recom­mends an RF power output level of +20 dBm from the AP.

Remote power is not setable. (See “Radio Configuration

Menu” on Page 58.)

2.3 STEP 2—CONNECT THE PRIMAR Y

POWER

The primary power at the transceiver’s power connector must be within

10.5–30 Vdc and be capable of continuously providing 30 Watts. Typ-

ical power consumption for 13.8 Vdc and 24 Vdc operation are listed in

SPECIFICATIONS on Page 162.

A Phoenix two-pole power connector with screw-terminals is provided
with each unit. Strip the wire leads to 6 mm (0.25"). Be sure to observe

proper polarity with the positive lead (+) on the left and negative (–) on

the right, as shown in Figure 2-2.

NOTE: The transceiver typically requires about 30 seconds to power up, and

might require several minutes to associate with another unit, if GPS
is required for time synchronization.

GPS is required for all configurations except when “Free Run”
single-channel (non-frequency hopping) operation is used, which
might be possible in some low-interference environments.

CAUTION

POSSIBLE

EQUIPMENT

DAMAGE

Only use the transceiver with negative-ground power
systems. Make sure the polarity of the power source
is correct.

Invisible place holder

Figure 2-2. Power Connector

(Polarity: Left +, Right –)

22 Mercury Reference Manual 05-4446A01, Rev. C