Safety Information 3
Revision History 5
Important Information 5
Compliance Information 6
Part B – Feature Overview 7
Introduction 7
Features and Benefits 8
Q Data Radio Range 9
Part C – System Topologies & Operating Modes 11
System Topologies 11
Operating Modes 16
Part D – Feature Detail 18
Hardware 18
Efficiency and Bandwidth 19
Connectivity 30
Ease of Use 32
Security 39
Part E – Radio Planning and Design 41
Radio Path analysis 41
BER & Fade Margin 43
Radio Accessories 44
RF Feeders and Protection 45
Part G– Quick Start Guide 78
Step-by-Step Point to Point Setup 78
Step-by-Step eDiags Setup 82
System Topology Configuration 83
Serial and MODBUS 89
Single Frequency (Simplex) Mode 94
E-Series Emulation Mode 95
Part H – Advanced 97
Connectivity 97
Ease of Use 105
Security 128
Part I – Installation & Commissioning 129
Optimising the Antenna for Rx Signal 131
Commissioning 132
Hot Standby Full Duplex Radio - QH450 62
LED indicators 70
Connecting Antennas 72
Communication Ports 72
Activating Transmitter 74
Factory Default 74
Digital I/O 75
Connecting to Web User Interface (WUI) 76
Resolving Ethernet Connection Issues 77
2 Document Number: 0100SM1401 Issue: 05-15
Part A – Preface
Safety Information
Part A - Preface
Read these instructions carefully, and look at the
equipment to become familiar with the device before
trying to install, operate, or maintain it. The following
special messages may appear throughout this
documentation or on the equipment to warn of potential
hazards or to call attention to information that clarifies or
simplifies a procedure.
The addition of this symbol to a Danger or
Warning safety label indicates that an electrical
hazard exists, which will result in personal injury
if the instructions are not followed.
This is the safety alert symbol. It is used to
alert you to a potential personal injury hazards.
Obey all safety messages that follow this
symbol to avoid possible injury or death.
WARNING
WARNING indicates a hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTION
CAUTION indicates a hazardous situation which, if not avoided, could result in
minor or moderate injury.
NOTICE
NOTICE is used to address practices not related to physical injury.
Electrical equipment should be installed, operated,
serviced, and maintained only by qualified personnel. No
responsibility is assumed by Schneider Electric for any
consequences arising out of the use of this material.
WARNING
HAZARD OF THERMAL BURNS
High operating temperature.
• Avoid direct contact with device while in operation.
• Install device in a restricted access location to avoid unintentional contact.
Failure to follow these instructions can result in death or serious injury.
WARNING
HAZARD OF RADIO FREQUENCY (RF) BURNS
Ensure that a matching load or antenna is attached to the RF port prior to
applying power to the device.
Failure to follow these instructions can result in death or serious injury.
WARNING
HAZARD OF EXPLOSION
Ensure that all connected equipment is grounded to the power source ground
termination.
Failure to follow these instructions can result in death or serious injury.
WEEE Regulation (Europe)
This symbol on the product or its
packaging indicates that this product
must not be disposed of with other waste.
Instead, it is your responsibility to dispose
of your waste equipment by handing it over to a designated
collection point for the recycling of waste electrical and
electronic equipment. The separate collection and recycling
of your waste equipment at the time of disposal will help
conserve natural resources and help ensure that it is
recycled in a manner that protects human health and the
environment. For more information about where you can
drop off your waste equipment for recycling, contact the
dealer from whom you originally purchased the product.
WARNING
HAZARD OF BURN
The QR450 must be installed in a restricted access location..
Failure to follow these instructions can result in death or serious injury.
WARNING
HAZARD OF BURN
Where an QB450 is to be operated between 60ºC and 70ºC (122°F and 158°F), it
must be installed in a restricted access location.
Failure to follow these instructions can result in death or serious injury.
For the definition of a restricted access location, refer to the
ETSI EN 60950 standard.
Document Number: 0100SM1401 Issue: 05-15
Dieses Symbol auf dem Produkt oder seinem Verpacken
zeigt an, daß dieses Produkt nicht mit anderer
Vergeudung entledigt werden darf. Stattdessen ist
es Ihre Verantwortlichkeit, sich Ihre überschüssige
Ausrüstung zu entledigen, indem es rüber sie zu
einem gekennzeichneten Ansammlungspunkt für
die Abfallverwertung elektrische und elektronische
Ausrüstung übergibt. Die unterschiedliche Ansammlung
und die Wiederverwertung Ihrer überschüssigen
Ausrüstung zu der Zeit der Beseitigung helfen,
Naturresourcen zu konservieren und sicherzugehen, daß
es in gewissem Sinne aufbereitet wird, daß menschliche
Gesundheit und das Klima schützt. Zu mehr Information
ungefähr, wo Sie weg von Ihrer überschüssigen
Ausrüstung für die Wiederverwertung fallen können,
treten Sie bitte mit dem Händler in Verbindung, von dem
Sie ursprünglich das Produkt kauften.
3
Part A - Preface
Before using this product, read the Safety Information, Compliance information and all recommendations related to the
purchased wireless communications equipment found within the Installation and Commissioning section found within the
product user manual. The product user manual is available at www.schneider-electric.com
WARNING
HAZARD OF UNINTENDED EQUIPMENT OPERATION
To help prevent equipment malfunction, take every precaution during installation against
incorrectly activating the wireless communications equipment. This equipment is not a
functional safety product.
Failure to follow these instructions can result in death or serious injury, and
equipment damage.
Environment
This environment is “enclosed”. It can be installed without any specific protection in areas with restricted access and low pollution
levels (not exceeding 2), for example; stations or control rooms which have neither machines nor any activity generating metallic
dust or other metallic particles. In other environments, it is recommended to follow rules as defined in the user manual. For the
definition of a restricted access location, refer to the ETSI EN 60950 standard.
WARNING
HAZARD OF DEATH OR SERIOUS INJURY
• The QR450 must be installed in a restricted access location.
• Where an QB450 is to be operated between 60ºC and 70ºC (140°F and 158°F), it must be
installed in a restricted access location.
• Ensure that the operating temperature (air surrounding equipment) never exceeds 70 °C
(158 °F)
• Ensure all radio equipment is installed with a lightning arrestor.
• Ensure all connected equipment is grounded to the power source ground termination.
• Where an internal fuse is to be replaced, the replacement fuse must be of the specied
type and current rating. Refer to fuse replacement instructions within the Product User
Manual before servicing.
• Ensure a matching load or antenna is attached to the RF port prior to applying power to
the device.
• RF Exposure - The radio equipment described in the Product User Manual emits low level
radio frequency energy. The concentrated energy may pose a health hazard depending
on the type of antenna used. To satisfy EU, FCC and Industry Canada requirements a
minimum separation distance should be maintained between the antenna of this device
and persons during operation as per the table below
Range of
Antenna gains
(dBd)
0 to 41.5
4 to 82.4
8 to 123.7
12 to 165.8
Failure to follow these instructions can result in death or serious injury.
Minimum
Separation from
Antenna (Meters)
Wiring
In order to improve the security of the installation, follow the rules below:
NOTICE
HAZARD OF EQUIPMENT DAMAGE
The radio modem can be damaged if there is any potential difference between the
chassis-ground, RS232 signal ground, power (-) input, or antenna coaxial shield.
Before connecting any wiring, ensure all components are earthed to a common
ground point.
Failure to follow these instructions can result in equipment damage.
Minimum
Separation from
Antenna (Feet)
5
7.6
12.2
19.1
4 Document Number: 0100SM1401 Issue: 05-15
Part A - Preface
Revision History
Issue: 08-14D
Issue: 09-14
Issue: 10-14
Issue: 02-15
Issue: 03-15
Issue: 05-15
- (August 2014)Initial release.
- (September 2014)Added QH450
- (October 2014)Updated Compliance
- (February 2015)Added QP450,
- (March 2015)Alarms and Events
- (May 2015)Updated Compliance
information.
E-Series Emulation
Mode and compliance
Information.
This manual covers the operation of the Q Data Radio
range. Specifications described are typical only and are
subject to normal manufacturing and service tolerances.
Trio Datacom Pty Ltd reserves the right to modify the
equipment, its specification or this manual without prior
notification, in the interest of improving performance,
reliability or servicing. At the time of publication all data is
correct for the operation of the equipment at the voltage
and/or temperature referred to. Performance data
indicates typical values related to the particular product.
This manual is copyright by Trio Datacom Pty Ltd. All
rights reserved. No part of the documentation or the
information supplied may be divulged to any third party
without the express written permission of Trio Datacom
Pty Ltd.
The manual is also proprietary to Trio Datacom Pty Ltd
and are supplied for the purposes referred to in the
accompanying documentation and must not be used
for any other purpose. All such information remains
the property of Trio Datacom Pty Ltd and may not be
reproduced, copied, stored on or transferred to any
other media or used or distributed in any way save for
the express purposes for which it is supplied.
Products offered may contain software which is
proprietary to Trio Datacom Pty Ltd. However, the
offer of supply of these products and services does
not include or infer any transfer of ownership of such
proprietary information and as such reproduction or
reuse without the express permission in writing from Trio
Datacom Pty Ltd is forbidden. Permission may be applied
for by contacting Trio Datacom Pty Ltd in writing.
Document Number: 0100SM1401 Issue: 05-15
5
Part A - Preface
Compliance Information
WARNING
HAZARD TO HEALTH DUE TO RADIO FREQUENCY (RF) EXPOSURE
• The radio equipment described in this user manual
emits low level radio frequency energy. The
concentrated energy may pose a health hazard
depending on the type of antenna used.
• To satisfy EU, FCC and Industry Canada requirements
a minimum separation distance should be maintained
between the antenna of this device and persons during
operation as per the table below.
Range of
Antenna gains
(dBd)
0 to 41.5
4 to 82.4
8 to 123.7
12 to 165.8
Failure to follow these instructions can result in death or serious injury.
Minimum
Separation from
Antenna (Meters)
Minimum
Separation from
Antenna (Feet)
5
7.6
12.2
19.1
Site Grounding
Ensure that the chassis mounting plate, power supply
(-) Ground, RTU terminal device, and lightning arrester,
are all securely connected to the ground in the building
installation or a common ground point to which an earth/
ground stake is attached.
R&TTE Directive (Europe)
Applies to models TBURQx4xx-Exxxxxxx
In order to comply with the R&TTE (Radio &
Telecommunications Terminal Equipment) directive
1999/5/EC, all radio modem installations must include
an external in-line lightning arrestor or equivalent device
that complies with the following specifications:
• DC Blocking Capability - 1.5kV impulse (Rise Time
10mS, Fall Time 700mS) (Repetition 10 Times)
or 1.0kV rms 50Hz sine wave for 1 minute.
Trio Datacom declares that the Q data radio range
is in compliance with the essential requirements and
other relevant provisions of the Directive 1999/5/
EC. Therefore the Trio Datacom Q data radio range is
labelled with the following CE-marking.
Typical Antenna Installation Exclusion Zone
The diagram below shows the exclusion zone for a
typical antenna installation. The details of this typical
system are as follows:
• Q Data Radio - 40dBm (10W)
• Antenna - Yagi 14 dBd/16.15 dBi gain
• Lightning Arrestor - 0.5dB loss
• Cable Run - 1.5dB loss
3.3m3.3m
3m Clearance
allowed for
Exclusion Zone
FCC Compliance
This device complies with part 15 of the FCC rules.
Operation is subject to the following two conditions: (1) this
device may not cause harmful interference, and (2) this
device must accept any interference received, including
interference that may cause undesired operation.
The manufacturer is not responsible for any radio or TV
interference caused by unauthorised modifications to
this equipment. Such modifications could void the user’s
authority to operate the equipment.
5m
0891
Collocating the QR450 remote (Europe)
The QR450 is a remote radio and should not be
collocated with other transmitting equipment.
FCC Compliance (Hot Standby Controller Only)
This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful
interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the
instruction, equipment may cause harmful interference
to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful
interference to radio or television reception, which can
be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by
one or more of the following measures:
• Re-orient to relocate the receiving antenna.
• Increase the separation between the equipment
and receiver.
• Connect the equipment into an outlet on a circuit
different to that which the receiver is connected.
• Consult the dealer or an experienced radio/
television technician for assistance.
When antennas are co-located on a community (shared)
site the correct site engineering must be performed to
ensure RF exposure limits are met.
FCC requirements can be found in 47 CFR 1.1307(b)(3)
6 Document Number: 0100SM1401 Issue: 05-15
Part B – Feature Overview
Part B – Feature Overview
Introduction
The Trio Q is a family of data radios designed for wireless transport of Telemetry and Remote SCADA data using the licensed
UHF spectrum.
Trio Q Data Radios are ideal where:
• Total ownership and control of the data radio network is required
• There are long distances to cover
• Public Communications (ie: Cellular) is too expensive or unreliable
• Variety of communications delivery is required
Trio Q Data radios are suitable for a wide variety of applications that require the transport of serial or Ethernet protocols,
including DNP, MODBUS and IEC, over distances of that up to 50Km (30 miles). Common applications include the monitoring
and control of remote assets in the management of:
• Water and Waste Water
• Electrical Distribution and Sub Station automation such as those found in Smart Grids
• The extraction and transportation of Oil & Gas
However, as data transport is transparent to the application, there are virtually no application-specific constraints, other than
data throughput and range.
A typical radio system topology permits a central master / control application, like a SCADA Host system for example,
to communicate with remotely-situated application equipment such as RTUs or PLCs; using single or dual-frequency
radio channels in the 400 MHz UHF band. A diverse range of system topologies are possible, but in general remote sites
communicate directly with the entry point or via repeater stations when direct communication is not possible.
Trio Q Data Radios come in a variety of hardware form factors. The QR450 Half-Duplex Radio, is ideal for deployment at remote
sites, and operates in simplex or half-duplex modes. Built around a rugged but compact die-cast housing, complete with
physical mounting locations, it also has an optional DIN rail mounting kit. Complementing this is the QB450 Full Duplex Radio,
which is ideal for deployment at entry point or repeater sites as it provides high performance full-duplex operation in a 1RU 19”
rack form factor. Where redundancy is of value, there are also Hot Standby variants of both the full and half duplex radios.
Over-the-air data speeds are now four times faster than those found in existing licensed data radio systems. Additionally, the
radio system can dynamically change its speed during a signal fade or rain storm, enhancing reliable operation, even at the
fastest speeds. Combined with features like IP routing and automatic retries, together with advances in collision avoidance,
Trio Q provides the ideal platform for building a scalable, easy-to-use, licensed data radio system, where users can greatly
increase the number of remote sites per system, and the amount of data transported over the network. Trio Q data radios
operate between 400 and 518MHz, are approved for use by ETSI & ACMA, are software-configurable for 12.5kHz or 25kHz
channels, and up to 10W of Transmit power even at the fastest speed.
There are two Ethernet and two serial ports, that operate in either a Layer-2 Ethernet or Layer-3 IP routing mode. For
serial data, both RS-232 and RS-485 is supported using embedded terminal servers, secured by 256-bit AES encryption.
Diagnostics and Configuration are performed via web server, Telnet/SSH or serial console, and built in wizards take out the
guess work. SNMP traps can provide real time alarm detection of parameters and Integration into ClearSCADA is painless with
library templates .
In summary, Trio Q Data radios offer enhanced flexibility, security and reliability, even in harsh, remote environments. They
provide an ideal foundation on which to build a data radio system that is scalable, has extended reach, and is virtually futureproof, to help you protect the value of your investment.
Document Number: 0100SM1401 Issue: 05-15
7
Part B – Feature Overview
Features and Benefits
Common Features – QR450 | QB450 | QP450 | QH450
Radio
• UHF Frequency Band Operation : 400-450MHz and 450-518MHz
• 12.5kHz and 25kHz channel operation in one radio model
• User configurable transmitter output power up to 10 Watts
• Coverage of common international frequency bands
• Designed to meet international FCC & ETSI radio regulatory requirements
• VSWR and over temperature protection
• Operation over full -40°C to +70°C (-40 to 158°F) ambient temperature range
• Automatic frequency offset compensation for years of service/calibration free operation
Ethernet
• Transport of Ethernet based protocols (including UDP, TCP, DHCP, ARP, ICMP, STP, IGMP, SNTP & TFPT)
• Layer-2 Ethernet Bridge Mode & Layer-3 IP Router mode
• Maximum narrowband channel utilisation with smart peer-to-peer repeating, broadcast filtering and data compression
• SNMP access to radio diagnostics parameters (including alarm detection and traps)
• Legacy RS-232/RS-485 serial support via embedded terminal servers (UDP/TCP) and MODBUS/TCP gateway
• Configuration via embedded HTTP, HTTPS web interface and/or Telnet/SSH/Serial console
• Local and (one to N) broadcast firmware upgrades
• Embedded NTP Time Server (NTP Client / Server / Client-Server / Manual modes)
• RF Data Rates: Up to 32kbps in a 12.5kHz ETSI Channel & 56kbps in a 25kHz Channel
• ChannelShare+™: Advanced dynamic supervisory collision avoidance system
Security
• Support for 256-bit AES encryption
#
• Password protected HTTP and HTTPS configuration/diagnostics management interface
• Password protected Telnet, SSH and Serial console interface
Diagnostics
• Compatible with the Trio TVIEW+ Diagnostics Network Management Software
• Embedded error rate testing facilities
• Diagnostics parameters available for Tx Power, RSSI, DV Supply Volts, Frequency Offset, Temperature and VSWR
• In-build event logging facility
Approvals
• Europe (ETSI): ETSI EN 300 113, EN 301 489, EN 60950
• United States (FCC): FCC Part 15, Part 90
• Canada (IC): IC RS119, ICES-001
• Australia (ACMA): ACMA AS4295-1995 (Data)
#: Export and import restrictions may apply.
8 Document Number: 0100SM1401 Issue: 05-15
Part B – Feature Overview
Q Data Radio Range
QR450 - Half Duplex Radio
The QR450 Half Duplex Radio is ideal for remote applications as it has a smaller form factor, allowing the product to be
installed in space restricted cabinets/enclosures. The QR450 can also be used as an Entry Point (Base/Master Station) or
repeater for systems with a small number of remotes where the transmitter duty cycle is low.
Features of the QR450 include:
• Simplex or Half duplex operation
• Small form factor, rugged die cast housing
115 x 34 x 164mm (4.52” x 1.33” x 6.45”)
• 10-30 V DC supply voltage.
• DIN Rail Mounting Kit Option
(TBURDIN-KIT-TYPEA)
• Suitable for use in Class I, Division 2, Groups A, B,
C & D hazardous locations
QB450 - Full Duplex Radio
Complimenting the QR450 half duplex remote radio, the QB450 full duplex radio is ideal for deployment at base & repeater
sites in systems using two frequency operation. In high duty cycle applications, the QB450 delivers maximum rated
transmitter power in ambient temperatures up to +70°C (158°F). Where 1+1 hot standby redundancy is required, the half
duplex QP450 and the full duplex QH450 are available.
Half Duplex Radio
Features of the QB450 include:
• Full Duplex operation (100% duty cycle)
• 19" 1RU rack mount
• Digital Inputs & Outputs
Full Duplex Base Radio
QP450 - Hot Standby Half Duplex Radio
The QP450 half duplex radio is ideal for deployment at base & repeater sites in systems using two frequency (half duplex) or
single frequency (simplex) operation, where it will only be required to transmit OR receive. In high duty cycle applications, the
QP450 delivers maximum rated transmitter power in ambient temperatures up to +70°C (158°F).
The features of the QP450 include:
• Simplex or Half duplex operation
• Duplicated redundant transceiver configuration
• Automatic change-over
• 19" 1RU rack mount
• Digital Inputs & Outputs
Document Number: 0100SM1401 Issue: 05-15
Half Duplex Hot Standby Base Radio
9
Part B – Feature Overview
QH450 - Hot Standby Full Duplex Radio
Complimenting the QR450 half duplex remote radio, the QH450 full duplex radio kit is ideal for deployment at base & repeater
sites in systems using two frequency operation. In high duty cycle applications, the QH450 delivers maximum rated transmitter
power in ambient temperatures up to +70°C (158°F). Where 1+1 hot standby redundancy is not required,
the full duplex QB450 base/repeater station is available.
The features of the QH450 include:
• Full Duplex operation (100% duty cycle)
• Ethernet link monitoring and shared IP address
provides smart Ethernet redundancy
• Remote monitoring, control and changeover of
duplicated base/repeater stations
• Automatic changeover upon alarm detection of
transmitter, receiver, data alarm detection, power
supply and data connectivity.
• Digital Inputs & Outputs
• Hot Standby Controller power supply
• 11-14V DC (from output of QBs)
• Max Current: 800mA
Full Duplex Hot Standby Base Radio
10 Document Number: 0100SM1401 Issue: 05-15
Part C – System Topologies & Operating Modes
Part C – System Topologies & Operating Modes
System Topologies
Introduction
Fundamental to understanding the use of the Q data radio range in your system is the need for a basic understanding of the
different types of radio system topologies and system topology functions.
System Topologies:
Point to Point (PTP):
• A system topology with two radios, one Entry Point and one Remote
Point to Multipoint (PTMP):
• A system topology with three or more radios, one Entry Point that directly communicates to two or more Remotes.
Point to Multipoint via a Repeater (PTMP/R):
• A system topology with three or more radios, one Entry Point that communicates via a repeater to two or more
Remotes.
Point to Multipoint via multiple Repeaters:
• A system topology with four or more radios, one Entry Point that communicates via multiple cascaded repeaters to
one or more Remotes.
Multipoint to multipoint (MPTMP):
• A system topology with one Entry Point and one or more remotes, and no repeaters, where remotes can talk directly
to the Entry Point or to each other.
• Only works with Simplex frequencies.
System Topology Functions:
Entry Point:
• The radio where user data enters the systems. Typically connected (directly or indirectly) to the Master RTU or SCADA Host.
Repeater:
• A radio which repeats data from an Entry point to Remote, or Remote to Remote, or Repeater to Repeater.
Remote:
• A radio which is the endpoint or perimeter of the system topology.
Each type of network is described in the following diagrams.
Point-to-Point (PTP)
A Point to Point (PTP) network has one Entry Point and one Remote radio. When full duplex radios are installed, full data
throughput can be achieved in each direction. Alternatively, half-duplex radios can also be implemented although collision
avoidance should be enabled.
Full Duplex radios have the advantage that they simulate a cable connection with respect to the connected devices. Even
if one device transmits continuously it will not block the other device from sending data. This is useful for applications that
expect full duplex communications or that are not designated to be radio modem friendly.
Document Number: 0100SM1401 Issue: 05-15
11
Point to Multipoint (PTMP)
Part C – System Topologies & Operating Modes
A Point to Multipoint (PTMP) network is normally chosen when a central site (i.e.: The HOST application) needs to
communicate with multiple REMOTE sites.
Point to Multipoint (PTMP) operation requires the Entry Point site to have adequate RF coverage of all Remote sites. A PTMP
offers optimal available bandwidth and data latency when multiple remote sites are required.
In a multiple access radio system (MAS), communication occurs from a common site (the Entry Point) to all others, either
using a half duplex or simplex radio channel. In addition, remote sites can communicate to each for peer to peer messaging,
via the Entry Point.
For two frequency systems, to facilitate efficient data communication and support features such as the ‘Channel Share+’
collision avoidance mechanism, it is recommended that the Entry Point be a full duplex radio (QB/QH).
Utilising a half duplex Entry Point radio is possible, however some features may not be available and system performance may
be lower when compared to using a full duplex entry point.
In most applications, this type of system topology is more efficient than other topologies.
12 Document Number: 0100SM1401 Issue: 05-15
Point to Multipoint via Repeater (PTMP via Rep)
Part C – System Topologies & Operating Modes
A Point to Multipoint via repeater (PTMP/R) network is a variation of the Point To Multipoint (PTMP) network. It is normally
chosen when the site where the Host application (i.e.: Entry Point) does not have adequate RF coverage of Remote sites in
the network.
This network topology consists of a radio configured as a Repeater (typically full duplex), an entry point radio and a number
of remotes. The repeater can be configured to repeat data based on either IP layer 2 (Bridge mode), or IP layer 3 (Router
mode) rules.
The repeater should be located at a site with adequate RF coverage to each of the remotes.
For two frequency systems, to facilitate efficient data communication and support features such as the ‘Channel Share+’
collision avoidance mechanism, it is recommended that the Repeater be a full duplex radio (QB/QH).
Utilising a half duplex Entry Point radio is possible, however some features may not be available and system performance may
be lower when compared to using a full duplex entry point.
Other aspects of the Point to Multipoint network apply to this network topology.
Document Number: 0100SM1401 Issue: 05-15
13
Part C – System Topologies & Operating Modes
Point to Multipoint via Multiple Repeaters (PTMP via multiple Reps)
A PTMP via multiple repeaters system is a variation of the PTMP/R system. It is normally chosen when the site where the Host
application (i.e.: Entry Point) together with the first repeater have inadequate RF coverage of remote sites in the network.
In this system topology, there are multiple radios configured as repeaters. The PTMP/R with multiple repeater system
topology is only possible when using IP routing mode. Each repeater is configured to repeat traffic based on destination IP
address.
The repeaters should be located at sites with adequate RF coverage for the remote sites. For two frequency systems, to
facilitate efficient data communication and support features such as the collision avoidance mechanism, it is recommended
that the first Repeater be a full duplex radio (QB/QH).
Utilizing a half duplex Repeater is possible, however some features may not be available and system performance may be
lower when compared to using a full duplex entry point.
Other aspects of the Point to Multipoint network apply to this network topology.
14 Document Number: 0100SM1401 Issue: 05-15
Flat Multipoint to Multipoint (MPTMP) - Simplex
Part C – System Topologies & Operating Modes
A Multipoint to Multipoint network is a variation of the Point To Multipoint network. It is primarily used when the system
requirement is for each site to be able to communicate directly with every other site. This requires every site to have
adequate RF line of sight to every other site along with the use of simplex frequencies (Rx & Tx frequencies are the same).
In this system topology, each site typically require the use of an omni directional antenna. This is to provide an even spread of
antenna gain to and from each site.
Document Number: 0100SM1401 Issue: 05-15
15
Part C – System Topologies & Operating Modes
Operating Modes
Introduction
This section assumes the reader has an operational understanding of industrial Ethernet.
A typical Ethernet network consists of a number of IP devices, all which share the requirement of data communication. In
order for a pair of devices within an Ethernet based network to communicate with one another, they need to be able to
address data to a specific destination (in this case, each other).
MAC Address - MAC addresses identify Ethernet devices on a network when operating at Layer-2. All Ethernet ports in
devices have their own unique media access control (MAC) address. There are special MAC addresses used for broadcast
and Multicast messages.
IP Address - An IP address is a numerical label assigned to each device (e.g., Radio, RTU, SCADA Host) participating in a
computer network that uses the Internet Protocol for communication.
An IP address serves two principal functions:
• Host or network interface identification and
• Location addressing.
Subnet - A subnet is a subdivision of an IP network. It allows a network designer to segment a large IP network into
smaller, manageable sub networks. This can assist in the allocation of IP addresses and the management of network
bandwidth.
Subnet Mask - Together with the IP address, the subnet mask is used to determine which subnet a device belongs to.
Gateway - A gateway forwards IP messages between devices on different subnets in an IP network. A gateway uses
configurable routing rules to determine where to forward an IP message.
Route - A route is a rule that indicates where an IP message needs to be sent in order to get to a specific device on an IP network.
Transparent Bridge Mode
The Q data radios can be configured to operate in a transparent bridge mode. This mode transports all data as layer 2 Ethernet
traffic over the radio network. Each radio will behave like a layer 2 Ethernet switch, transparently forwarding data, based on rules,
dynamically determined from device MAC addresses. Although traffic is transported at layer 2, each radio requires an IP address
in order for a user to access radio management features (web server/telnet/diagnostics/etc..).
The example below shows a typical PTMP/R topology, with all radios operating in bridge mode.
From an IP network perspective, each radio within the topology above, effectively looks like an Ethernet switch. See the
example below.
16 Document Number: 0100SM1401 Issue: 05-15
Part C – System Topologies & Operating Modes
Router Mode
The Q data radios can also be configured to operate in router mode. Router mode provides the radio the ability to route IP
data, based on user configurable network routing rules (OSI model layer 3), between devices on different subnets.
The benefits of router mode include:
• Faster poll times
• Higher throughput
• Improved management of IP addresses
Each radio behaves as a network gateway for its corresponding subnet. This allows a network designer to segment a wide
area IP network (WAN) into smaller subnets, which minimises the amount of over the air radio traffic. The example below
shows how router mode segments an IP radio network into smaller subnets. Each radio has it’s own subnet, represented in
the example by dashed colored boxes.
Document Number: 0100SM1401 Issue: 05-15
17
Part D – Feature Detail
QR450 Hardware Overview
Diagnostics & Management
M
RSSI Output
r
•
Over Temperature
Foldback
g
r
g
QB450 Hardware Overview
Digital Inputs / Outputs
RF Port
•
Alarm Output
•
Separate
Tx
/Rx Connections
S
EDS
A
g
19” 1RU Rack M
d
p
FactoryReset
g
9 C
r
pp
Hardware
QR450 - Half Duplex Radio
• Status LEDs
ountingHoles
• Flat Panel Mounting
• DIN Rail Mounting
RF Port
• Up to 10W RF Power
• High VSWR Foldback
• -40 to +70 degC (-40 to +158 degF)
•
• Factory Reset
Part D – Feature Detail
DC Powe
• 10-30 V DC
• 5W standby
Ethernet Ports
• 2 x 10/100 MBps
• Auto MDIX Sensing
Serial Ports
• Dual RS-232 Serial Ports
• Shared on sin
• Break Out cable if two ports required
• RS-485 mode supported
QB450 - Full Duplex Radio
• 3 DI / 3 DO
• Read/Write via SNMP
General
•
• -40 to +70 degC (-40 to +158
degF) @ 100% duty cycle
• Full Du
• Temperature Controlled Fan
forced cooling
lex Operation
le DB-9 Connecto
ounte
Serial Ports
• Dual RS-232 Serial Ports
•Shared on singleDB-
• Break Out cable if two ports required
• RS-485 mode supported
• Up to 10W RF Power
• High VSWR Foldback
• Over Temperature Foldback
tatus L
• Status LEDs
• RSSI Output
•
Ethernet Ports
• 3 x 10/100 MBps
•
onnecto
uto MDIX Sensin
18 Document Number: 0100SM1401 Issue: 05-15
Efficiency and Bandwidth
RF Speeds and Sensitivity
Part D – Feature Detail
The Trio Q data radios use continuous phase
modulation (CPM) which supports up to 10 Watts
of transmitter output power, even at the fastest RF
data rate.
This avoids the need to compromise on range
when operating at the fastest speeds. Two
different radio variants and modulation types
are available, depending on the regulatory
requirements (FCC or ACMA/ETSI).
• TBURQx4xx-E00xxxxxx: ‘E’ denotes ACMA/ETSI
• TBURQx4xx-F00xxxxxx: ‘F’ denotes FCC
Regulatory
Region
FCC/IC
ACMA/
ETSI
Channel Bandwidth
(KHz)
12.5
12.5
25
RF Speed (Kbps)
8
16
24
32
8
16
24
32
14
28
42
56
BER threshold
(10^6)
-113
-110
-107
-100
-113
-110
-107
-100
-111
-109
-106
-99
Contact your local sales representative if you
need to confirm the applicable model for your
regulatory region.
ARQs
Automatic Repeat reQuests (ARQs): When enabled, ARQs confirm successful reception of data transmitted over the air.
Each time a radio (originator) transmits data, the receiving radio replies with an acknowledgement back to the originator,
confirming successful reception of the data. If an acknowledgement is not received by the originator within an acceptable
time frame, the originator declares the data lost and retransmits the data. The number of retransmit attempts is user
configurable (i.e. when ARQ = 2, there will be a maximum of two retransmit attempts per message).
When Ethernet data is not successfully transmitted over a radio network (i.e. due to a data collision), Ethernet devices can
interpret this as network congestion, resulting in unnecessary slow down of SCADA polling. ARQs increase the probability of
successful transportation of data over the radio link. However, when ARQs are enabled, the capacity of the radio network is
reduced, due to the ARQ acknowledgements. As only one device can generate an acknowledgement for received data, ARQs
are not applicable to broadcast or multicast traffic
Typical data transaction with ARQ enabled
The example below shows the ARQ behavior between a pair of radios during a typical data transaction.
Host Application to Entry
Point
SCADA POLLSCADA POLL SCADA POLL
ARQ ACK
Document Number: 0100SM1401 Issue: 05-15
Entry Point to RemoteRemote to RTU
(ARQ flag enabled)
ARQ ON
(ARQ flag enabled)
ARQ ON
RTU RESPONSE
RTU RESPONSE RTU RESPONSE
ARQ ACK
19
Part D – Feature Detail
Automatic Retry Example
The example below shows the ARQ behavior between a pair of radios when a packet is lost during a transmission (ARQ =1).
Host Application to Entry
Point
Entry Point to RemoteRemote to RTU
SCADA POLL Lost
SCADA POLL
SCADA POLL
ARQ ON
Acknowledgement wait time
(Automatic Retry)
SCADA POLL
RTU RESPONSE RTU RESPONSE
ARQ ACK
SCADA POLL
ARQ ON
ARQ ON
RTU RESPONSE
ARQ ACK
The radio will wait 500ms for an acknowledgement, before sending an automatic retry. It is recommended
that the SCADA host poll response time out time is configured to be a minimum of 3 seconds.
20 Document Number: 0100SM1401 Issue: 05-15
Dynamic Speed Selection Example
Part D – Feature Detail
Dynamic Speed Selection
Traditional narrow band SCADA data radios achieved wireless communication over long distances by transmitting at low
RF data rates (typically 9600bps or less). Modern SCADA systems require faster RF data rates, due to the need to support
additional traffic for Ethernet and IP. However, reliable transmission over long distances at faster RF data rates, can be difficult
to achieve.
To assist in reliable data transmission over long distances at faster RF data rates, the Trio Q data radios utilise dynamic speed
selection. Dynamic speed selection provides the following enhancements:
• Operation at the fastest possible RF speeds
• Measurement of Quality of Service - QoS (success of data delivery to other end) and
• Automatically adjusting to a slower RF speed to improve quality, if QoS is inadequate
Dynamic speed selection is individual for each remote in a point to multipoint (PTMP) system. Should one remote need to
operate at a slower RF speed due to limited received RF signal, others will continue to operate at the fastest possible RF
speed as dictated by their own received RF signal strength for that specific site.
RF Data Rate vs RF Sensitivity
As stated earlier in this section, Trio Q Data Radios have four different RF speeds for each channel bandwidth selection
(12.5kHz or 25kHz). Each RF speed has a corresponding receiver 1 x 10-6 BER (Bit Error Rate) sensitivity. The slower the RF
speed, the better RF sensitivity, and therefore the longer the range for a given level of reliability.
Medium Speed
Tx
Low Speed
The further away from the master station, the weaker the received signal. Slower RF speeds are required for an acceptable
level of reliability.
Consider the example shown in the diagram above. An entry point / base station is located in a fixed position. When
communicating with a remote radio, RF energy between the two radios diminishes in strength as the signal propagates over
distance.
In a system with out dynamic RF speed selection, the user would need to configure a suitable fixed RF speed, dependent on
the signal strength at the remote site. In most applications, a minimum of 20dB fade margin is recommended for reliable
operation (due to rain fades, cable degradation, multipath fading, etc). If the remote radio is fixed at a specific RF speed,
then in order to maintain a received signal 20dB above the 1E-6 BER sensitivity (20dB fade margin), the user would need to
decrease the RF speed when the receiving radio is further away from the transmitter. This is depicted in the diagram above
by the concentric rings showing what RF speed can needs to be selected in order to maintain a 20dB fade margin.
Very High Speed
High Speed
Document Number: 0100SM1401 Issue: 05-15
21
Part D – Feature Detail
Consider now, in the below example where dynamic RF speed selection is enabled. Now that the receiving radio can adjust
its RF speed dynamically, a faster RF speed can be chosen for normal operation. Even though the faster RF speed will not
provide 20dB of fade margin, the system is still reliable because dynamic speed selection will drop down in RF speed when a
signal fade occurs.
Dynamic Speed - No Obstructions
• Multiple different RF speeds can be
utilised simultaneously, as dictated by
the site distance from the base station.
• Each site will operated at the fastest
possible RF speed.
Old Technology - No Obstructions
• Older technology can only operate at the
same fixed RF speed, normally dictated by
the site requiring the longest range.
• All other sites are compromised by having
to operate at the slower RF speed
22 Document Number: 0100SM1401 Issue: 05-15
Part D – Feature Detail
Dynamic speed selection derives QoS from both RSSI (Received Signal Strength) and ARQ performance in order to maintain a
radio link operating at the fastest speed possible for the given quality of the link.
Each radio stores a table of destination MAC addresses vs fastest RF speed in a dynamic speed cache, using information learned
from previous transactions over the air. In this way, the radio dynamically learns what RF speed should be chosen for a transmission.
Should the transmission generate an ARQ, the radio will drop down in RF speed to improve reliability of data delivery.
In the event that radio has not yet learnt the fastest RF speed for a destination MAC, the message will be transmitted out at
the slowest RF speed in the given bandwidth, to provide the highest sensitivity, and therefore the highest reliability.
As broadcast and multicast addresses are potentially destined for multiple radios these types messages will always be
transmitted at the slowest speed. The following diagrams show how the RF data rate can be influenced by obstructions:
Dynamic Speed - With Obstructions
• Radios which detect reduced QoS
(Quality of Service) can increase
reliability by dynamically reducing
their RF speed to the base station.
• Sites which are not impacted by
reduced QoS remain unchanged.
Old Technology - With Obstructions
• Older technology does not have the
ability to monitor the radio link QoS
or dynamically adjust the over the air
data rate, which can result in loss of
communications.
Document Number: 0100SM1401 Issue: 05-15
23
Part D – Feature Detail
Dynamic Speed Cache
The dynamic speed cache is used by a radio to record specific external values that are learnt. These values are then used by
other processes within the radio (such as dynamic speed and ARQ) to help ensure optimum performance is achieved over
the radio channel.
External values that are learnt are shown in the table below.
Remote Host MACAssociated Radio Serial NumberRSSI level
Remote Host MAC: The MAC address of a device which is connected to a remote radio.
Associated Radio Serial Number: The Unique ID of a remote radio with which the Remote Host Device/MAC is associated with.
RSSI level: The signal strength received from the radio specified within the associated radio serial number field.
A typical data packet structure is shown below. (For the purposes of this example, the preamble, Ethernet type and CRC
fields have been excluded.)
Destination MACSource MACDatagram
Data packets sent over the air between radios have an additional field appended. An example is shown below.
Destination MACSource MACDatagram
Consider now, in the below example where dynamic RF speed selection is enabled. Now that the receiving radio can adjust
its RF speed dynamically, a faster RF speed can be chosen for normal operation. Even though the faster RF speed will not
provide 20dB of fade margin, the system is still reliable because dynamic speed selection will drop down in RF speed when a
signal fade occurs.
Dynamic speed selection derives QoS from both RSSI (Received Signal Strength) and ARQ performance in order to maintain a
radio link operating at the fastest speed possible for the given quality of the link. The two influencing factors are:
Each radio stores a table of destination MAC addresses vs fastest RF speed in a dynamic speed cache, using information
learned from previous transactions over the air. In this way, the radio dynamically learns what RF speed should be chosen for
a transmission. Should the transmission generate an ARQ, the radio will drop down in RF speed to improve reliability of data
delivery.
In the event that radio has not yet learnt the fastest RF speed for a destination MAC, the message will be transmitted out at
the slowest RF speed in the given bandwidth, to provide the highest sensitivity, and therefore the highest reliability.
As broadcast and multicast addresses are potentially destined for multiple radios these types messages will always be
transmitted at the slowest speed.
Radio Headers
Source Radio
Serial Number
ARQ Flag
24 Document Number: 0100SM1401 Issue: 05-15
Part D – Feature Detail
E-Series Emulation Mode
The Q data radios can be configured to operate in E-Series emulation mode. This can allow the replacement of existing
E-Series radio networks to be upgraded to Q data radio systems at a pace the user defines.
E-Series Emulation Mode can provide:
• A cost effective upgrade to a Q data radio network
• Minimise SCADA connectivity downtime during an upgrade
• A greater subset of features once the radio network is fully upgraded, as E-Series emulation mode is a user configurable feature.
The diagram below shows how an existing E-Series radio system can be progressively upgraded to a Q data radio system by
replacing E-Series radios ‘One by One’ with Q data radios operating in E-Series emulation mode.
Once all E-Series have been replaced, the Q data radios may be re-configured to operate in Q mode, to provide advanced
features and functionallities of the Q data radios.
Document Number: 0100SM1401 Issue: 05-15
25
Part D – Feature Detail
Collision Avoidance
Introduction
In many SCADA and remote Telemetry applications, there exists the potential for over the air data collisions between radios.
This can occur when multiple asynchronous data traffic is present on the radio channel, such as SCADA polling, SCADA
exception reports, SNMP traps, pings and ARP requests.
In two frequency systems, collisions may occur on the receive channel of an Entry Point or Repeater radio, due to two or
more remotes transmitting simultaneously. If this occurs, the radio will receive a corrupted message from both radios and a
re-try will be required. Similarly, in simplex (single frequency) systems, collisions may occur on any receiving radio when two
or more radio transmit simultaneously.
In two frequency systems, collision avoidance minimises the chance of collisions by configuring one radio, as the collision
avoidance master, which informs remote radios when the master’s receive RF channel is busy. Remotes will check whether
the master is allowing access to the channel before a transmission occurs. If the channel is free, the remote will transmit. if
the channel is busy, the remote will buffer the message and execute a small random delay (in case multiple remotes have
data to send), then attempt to access the channel again. By avoiding collisions the SCADA system is able to operate more
efficiently, with fewer retries. Similarly, in simplex (single frequency) systems, remote radios can detect when the Entry Point
or Repeater radio is transmitting, and wait for it finish, before transmitting itself.
For two frequency systems, there are two different modes of collision avoidance:
• Carrier Detect - Remote radios in a carrier detect collision avoidance system, listen for a transmission (carrier)
from the collision avoidance master, to determine if the collision avoidance master is currently busy receiving a
transmission from another remote. When the collision avoidance master receives a transmission from a remote, it
activates its own transmitter, indicating to all other remotes that the channel is busy.
In this mode of operation, remote radios can not distinguish between the collision avoidance master transmitting data
and the collision avoidance master indicating the channel is busy.
Carrier Detect Mode can also be used without a collision avoidance master. This is typically implemented in simplex
systems, or systems with a small number of remotes.
• ChannelShare+™ - Remote radios in a ChannelShare+ collision avoidance system, monitor a channel busy flag in the
digital data stream transmitted from the collision avoidance master to determine if the collision avoidance master
is currently busy receiving a transmission from another remote. When the collision avoidance master receives a
transmission from a remote, it activates its own transmitter and sets the channel busy flag, indicating to all other
remote the channel is busy. However, unlike carrier detect mode, if the collision avoidance master needs to transmit
data to remotes, it can do so and clear the channel busy flag.
In this mode of operation, remote radios can distinguish between the collision avoidance master transmitting data and
the collision avoidance master indicating the channel is busy. Even if the collision avoidance master is transmitting
data, a remote radio can transmit data back to the collision avoidance master. In this way the radio system can fully
utilise the full duplex capabilities of the Entry Point or the Repeater (collision avoidance master). The channel busy
flag consumes a small amount of bandwidth in the collision avoidance master to remote direction. However, as this
direction is one to many, it has negligible impact on radio network capacity.
ChannelShare+ can be used in two frequency, PTMP and PTMP/R system topologies where the Entry Point or Repeater
is full duplex. It is not available in simplex systems, or where the Entry Point/Repeater is half duplex or in PTMP via
multiple Repeaters system topologies.
26 Document Number: 0100SM1401 Issue: 05-15
Part D – Feature Detail
Collision avoidance operational examples:
Collision avoidance (C/A) has a number of user configurable parameters. These parameters work together with the specific
mode of C/A chosen to minimise the number of collisions on the radio channel. Interaction of these parameters in C/A is best
explained by reviewing the operational flow charts for common C/A configurations.
ChannelShare+™ Example 1
This flow chart shows the C/A operation in a remote
radio with the following configuration:
Data waiting to be
transmitted
• C/A: ChannelShare+
• Backoff Method: Retry After Tx attempt
• Backoff time:
- Max Slots: 16
- Slot Time: 20ms
Is C/A busy
flag set?
No
Transmit data to
C/A master
• Data Priority: Tx Data
When data is ready to be transmitted, the remote radio
checks the C/A busy flag to see if it is set (i.e. is the C/A
master receiver busy). If the C/A busy flag is clear, the
data is transmitted to the C/A master. If the C/A busy
Wait a random
Yes
time
flag is set, the radio waits a random time before trying
again.
As it is possible that there may be more than one radio waiting to transmit data to the C/A master, a random wait time is
applied, to avoid two radios waiting the same time, retrying and then colliding. There are multiple configurable parameters
involved in when the wait time is applied and what amount of time is waited.
• Backoff Method - Defines ‘when’ a radio will implement the backoff time. In this example, the backoff method is
configured to ‘Retry After Tx Attempt’. If the C/A busy flag is clear, the remote will transmit data immediately. If the
C/A busy flag is set, the remote will wait a random Backoff time and try again.
The Backoff time is calculated by choosing a random number between 1 and ‘Max Slots’ (in this example 16) and multiplying
the number by the ‘Slot Time’ (in this example 20ms). In any remote radio, a smaller number of ‘Max Slots’ and ‘Slot Time’
can be configured to reduce the random Backoff time, which will increase the rate at which the radio checks the C/A busy
flag. In effect, a radio with a smaller backoff time has a higher probability of transmitting its data first, in a situation where
multiple remote radios are waiting for access the channel.
As the data priority is configured for Tx Data, the radio will transmit data even when an incoming data packet it being
received.
This collision avoidance configuration provides maximum radio channel efficiency and are recommended when there is
multiple asynchronous data traffic on the radio channel.
Document Number: 0100SM1401 Issue: 05-15
27
Part D – Feature Detail
ChannelShare+™ Example 2
This flow chart shows the C/A operation in a remote
Data waiting to be
transmitted
radio with the following configuration:
• C/A: ChannelShare+
• Backoff Method: Delay Before Tx attempt
• Backoff time:
Wait a random
time
- Max Slots: 16
- Slot Time: 20ms
• Data Priority: Tx Data
When data is ready to be transmitted, the remote radio
waits a random time before checking the C/A busy flag
Is C/A busy
flag set?
No
Transmit data to
C/A master
to see if it is set (i.e. is the C/A master receiver busy). If
the C/A busy flag is clear, the data is transmitted to the
C/A master. If the C/A busy flag is set, the radio repeats
Yes
the wait time and tries again.
The primary difference when compared to example 1, is that the radio applies the random wait time before any attempt is
made to check the C/A busy flag.
This collision avoidance configuration provides maximum radio channel efficiency when there is synchronous data traffic on
the radio channel (i.e. GPS timing, synchronous exception reports) .
Rx data ‘Priority’:
In PTMP/R system topologies, where the Entry Point radio is half duplex, the configuration of Rx data priority may be required.
This is particularly useful for asynchronous traffic, such as a combination of SCADA exception reporting and polling. In this
scenario, the probability that a data packet currently being receive by the Entry Point radio is for the Entry Point radio and not
for a remote, is high. Therefore, without Rx data priority, incoming packets to the Entry Point radio would be lost if priority was
given to transmitting packets.
28 Document Number: 0100SM1401 Issue: 05-15
Part D – Feature Detail
Compression
In determining whether to use compression, the type of application and the latency requirements may need to be
considered. Compression will typically reduce the size of data packets being sent over the radio channel, if the original data
is compressible, at the expense of slightly (ie: a few milliseconds) longer latency. SCADA traffic such as DNP3 or Modbus are
well suited to compression. Applying compression to data that is highly random (ie: encrypted data) should be avoided as it is
unlikely to be compressible. Compression is enabled by default.
Ethernet Filtering
Ethernet filtering provides an easy to configure Layer 2 filtering mechanism, which can help prevent unnecessary Ethernet traffic
and increasing channel loading. There are various different addressing methodologies that can be filtered, which include:
Unicast:
Unicast is an addressing methodology that delivers messages to a single network destination
identified by a unique address.
Multicast:
Multicast is an addressing methodology that delivers messages to a group of destination addresses
simultaneously in a single transmission. Spanning tree messages are an example of multicast
messages.
Broadcast:
Broadcast is an addressing methodology that delivers messages to every device on a network. The
broadcast address of a device is calculated from the subnet mask. If all devices within a network use a
common network mask, the broadcast address will also be common.
Although typical SCADA applications only require Unicast & ARP data, the filtering mechanism provides the option to allow:
• All Ethernet traffic
• Unicast & ARP only (ARP is primarily used by networks to identify which physical devices own which IP addresses).
• Unicast only (Only used when a MAC address table is statically assigned).
• Or allow traffic from a single MAC address only.
Although Spanning tree messages are multicast messages, they are also filtered out unless the user is allowing all Ethernet
traffic to pass. This also helps to prevent unnecessary channel loading.
Document Number: 0100SM1401 Issue: 05-15
29
Part D – Feature Detail
Connectivity
Embedded Serial Device Server
A serial device server can perform two tasks: encapsulate serial data within IP headers to allow transportation of the serial
data over a LAN/WAN, or take IP encapsulated serial data, strip off the IP headers and output the raw serial data. Normally,
systems require a standalone device server to integrate external serial devices at remotes sites into a managed LAN/WAN.
Q data radios provide the functionality of two embedded device servers which avoids the requirement for an external device
server. The example below shows a traditional IP radio, Ethernet to serial topology, using an external device server.
In a system that requires a serial connection to a remote end device and an Ethernet connection at the Host application end,
the device server should be enabled within the remote radio. When the embedded device server is enabled, the remote radio
provides the same functionality as if there was an external device server at the remote site. This functionality is also available
in a PTMP system.
Device Server mode provides an easily configurable mechanism for transporting serial traffic that does not have any built-in
addressing. The benefit of the device server feature is that device addressing can be performed using IP addresses for nonaddressable serial protocols, without the need for external terminal servers or managing serial devices using the IP address of
the remote radio.
Features of the embedded serial device server include:
• Support for two independent fully configurable serial device servers.
• Support for three transport protocols: TCP, UDP and PPP.
• Support for three modes of TCP operation: Client mode, Server mode and Client/Server mode.
• User-configurable port numbers.
• Support for up to 4 simultaneous TCP connections when operating in server mode.
The diagram below shows a typical setup using the device server functionality in remote radios.
30 Document Number: 0100SM1401 Issue: 05-15
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