Rajant Corporation
400 East King Street
Malvern, PA 19355
Tel: (484) 595-0233
Fax: (484) 595-0244
http://www.rajant.com
Document Part Number: 03-100101-001
FCC and IC Statements
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the device is operated in a commercial environment. This device
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance
with this instruction manual, may cause harmful interference to radio communications. Operation of
this device in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at their own expense.
This Class A digital apparatus complies with Canadian ICES-003 and RSS-210 rules.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 et CNR-210 du Canada.
WARNING: To satisfy FCC RF exposure requirements a minimum safe distance of 20 cm must be
maintained between this device and all persons while the device is operating.
CAUTION: To reduce potential radio interference to other users, the antenna type and its gain
should be chosen so that the equivalent isotropically radiated power (EIRP) is not more than that
permitted for successful communication.
CAUTION: Changes or modifications not expressly approved by Rajant Corp. could void the user's
authority to operate the equipment.
Copyright Statement
You may use the software provided with the products only on personal computers owned by the
purchasing individual or entity, and may not use, load, or run any such software on any network or in
any type of service bureau, time-sharing operation, or non-purchasing individual or entity's
equipment.
BCAdmin and BCAPI are trademarks; Rajant, the Rajant logo, BreadCrumb, Instamesh, BC|
Commander, and Bring Your Network with You! are registered trademarks of Rajant Corp. in the
United States and certain other countries.
Table 10: BreadCrumb to BCWN Connectivity Issues.........................................................26
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Rajant CorporationBreadCrumb® LX/LX3 User Guide
03-100101-001Version: 2.91
Preface
Purpose and Scope
This manual provides information and guidance to all personnel who are involved with and use
Rajant Corporation’s BreadCrumb LX/LX3 product.
This manual begins with an introduction to the BreadCrumb Wireless Network (BCWN). It then
characterizes the features of the BreadCrumb LX/LX3. Finally, it describes common deployment
scenarios and provides concise step-by-step instructions for each scenario.
User Information
The user of this manual is encouraged to submit comments and recommended changes to improve
this manual. Please send any comments or changes to support@rajant.com. Be sure to include the
version number of the manual you are using and please provide the page numbers related to your
comments wherever possible
Related Documentation
For additional BreadCrumb LX/LX3 information, refer to these documents:
•Rajant BC|Commander® User Guide: This document contains information on the BC|
Commander management application, which is used to configure BreadCrumbs before or
during a deployment.
•BreadCrumb® Wireless Network User Guide—For the BreadCrumb®Wireless Network
Release 9.0: This document contains information relevant to the old BreadCrumb®
firmware release v9, and the BCAdmin application, which is used to manage a v9 network.
•BreadCrumb® Video Guide
•BreadCrumb® VLAN Guide
•Rajant Troubleshooting Range User Guide
•RF Component Installation and Verification in BreadCrumb® Networks
v
Rajant CorporationBreadCrumb® LX/LX3 User Guide
03-100101-001Version: 2.91
1 Introduction
Rajant Corporation's (http://www.rajant.com) BreadCrumb LX/LX3 utilizes the IEEE 802.11a and
802.11g wireless networking standards to form a wireless mesh network. The network is mobile,
self-integrating, self-meshing, self-healing, full-duplex and secure. The focus is on flexibility,
adaptability, and simplicity.
The BreadCrumb Wireless Network (BCWN) is intended for rapid deployment of a broadband
wireless network into a situation or “hot zone.” The network can be deployed as a stand-alone
wireless network, or bridged to another network (such as the Internet) utilizing available reach-back
communication links (such as a DSL, cable, or satellite modem).
BreadCrumb LX/LX3 provides high bandwidth applications to stream video, audio as well as data
over large distances. The network traffic can be secured by using different security features offered
by the BCWN. This makes the network optimal for tactical deployments as well as emergency
response situations since it offers robustness, stability and ease of setup in mission critical activities.
Throughout this document, unless otherwise stated, the term LX is used to refer to
Note
Rajant BreadCrumb LX, the term LX3 is used to refer to Rajant BreadCrumb LX3,
and the term BreadCrumb is used to refer to both Rajant BreadCrumb LX and
Rajant Breadcrumb LX3.
1.1 What is a BreadCrumb?
A BreadCrumb is an IEEE 802.11 (Wi-Fi) and Ethernet compatible networking device which has the
capacity to connect to other BreadCrumbs or networking devices to form a BreadCrumb network. A
BreadCrumb is specifically designed for the following scenarios:
Temporary Wireless Networks
Networks that must be established quickly and with minimal effort for short-term use (e.g., a
network established to provide First Responder support at the site of a disaster).
Mobile Wireless Networks
Networks in which the network infrastructure itself is mobile, in addition to client devices (e.g., a
convoy viewing a video stream from a UAV).
Wireless Network Extension
Networks in which a wireless network must be quickly extended around or through obstacles that
block wireless communications (e.g., urban canyon networks, tunnels/caves, etc.)
Wired Network Extension
Networks in which two or more wired LANs at different locations must be connected wirelessly
(e.g., to securely connect combat service support computers with logistics bases)
Any Combination of the Above
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BreadCrumb® LX/LX3 User GuideRajant Corporation
Version: 2.9103-100101-001
Most BreadCrumb deployments include elements from more than one of the above scenarios.
In many cases, BreadCrumbs will perform all of these tasks as shipped with no configuration
necessary at all, providing an instant TAN (Tactical Area Network). Moreover, because
BreadCrumbs use industry-standard 802.11 communications, client devices such as laptops or
handheld computers require no special hardware, software, or configuration to access a BCWN.
1.2 Mobility through Meshing
The key component to a BCWN is a technique known as Meshing. While this is generally handled
automatically by BreadCrumbs, complex deployment scenarios require a basic understanding of how
BreadCrumbs establish and maintain a mesh.
1.2.1 Mesh – A Definition
A mesh is a collection of network devices (in our case, BreadCrumbs), each of which is linked to one
or more other BreadCrumbs. Data can move between BreadCrumbs via these links, possibly passing
through several intermediate BreadCrumbs before arriving at its final destination.
The intelligence of a BCWN is in how it adapts rapidly to the creation or destruction of the links in
the mesh as devices are moved, switched OFF or ON, blocked by obstructions, interfered with by
other devices, or otherwise affected. This adaptation takes place automatically and immediately as
needed.
Although all BreadCrumbs can be access points, most access points do not provide
Note
mesh capability. Traditional access points simply allow wireless devices within
range to connect to a wired network; they do not extend range through other access
points.
1.2.2 BreadCrumbs Mesh by Channel and ESSID
Two BreadCrumbs establish a mesh link to each other when they share both a radio channel and an
ESSID. An ESSID is essentially a name for a wireless network. By default, BreadCrumbs use the
ESSID "breadcrumb54" if programmed with v9 firmware, and “breadcrumb54-v10” if programmed
with v10 firmware. The following examples illustrate the use of channels and ESSIDs:
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Rajant CorporationBreadCrumb® LX/LX3 User Guide
CHANN EL 1
C
H
A
N
N
E
L
1
1
CHANNEL 8
RADIO 2
BREAD CRUMB B
RADIO 1
RADIO 1
BREAD CRUMB C
RADIO 2RADIO 1
BREAD CRUMB A
RADIO 2
CHANNEL 8
RADIO 2
BREADC RUMB B
RADIO 1
RADIO 1
BREADC RUMB C
RADIO 2RADIO 2
BREADC RUMB A
RADIO 1
03-100101-001Version: 2.91
Example 1:
Suppose you have three BreadCrumbs, called A, B, and C. Each has two radios. BreadCrumb A’s
radios are on channels 1 and 8, B’s are on 8 and 11, and C’s are on 1 and 11. All three BreadCrumbs
are using the default ESSID of "breadcrumb54-v10." Assuming that all three BreadCrumbs are
within radio range of one another, the network will be connected, as shown below:
Figure 1: All BreadCrumbs use the same ESSID.
Example 2:
Now suppose that you change the ESSID of BreadCrumb C to "lonely". The network will adjust to
this change, resulting in the following configuration:
Note that BreadCrumb C can no longer communicate with A or B, and vice versa.
Figure 2: ESSID of BreadCrumb C changes to "lonely."
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BreadCrumb® LX/LX3 User GuideRajant Corporation
Version: 2.9103-100101-001
1.3 Description of BreadCrumb LX/LX3
1.3.1 Radios
BreadCrumb LX offers two radios, while BreadCrumb LX3 offers three radios. 802.11g radios are
used in the 900 MHz and 2.4 GHz bands, and 802.11a radios are used in the 4.9 GHz and 5 GHz
bands. The radios support the following channels and frequencies in the United States and Canada:
Not all channels are allowed for use everywhere around the world. Check with the
Note
Table 1: 2.4 GHz Radio Channel and Frequencies.
Channel NumberCenter Frequency (MHz)
corresponding wireless spectrum regulatory body to determine the subset of
channels authorized for use in your country.
12412
22417
32422
42427
52432
62437
72442
82447
92452
102457
112462
The default channel for a 2.4 GHz BreadCrumb radio is 11 (2462 MHz).
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Rajant CorporationBreadCrumb® LX/LX3 User Guide
03-100101-001Version: 2.91
Table 2: 900 MHz Radio Channel and Frequencies.
Channel NumberCenter Frequency (MHz)
5912
6917
The default channel for a 900 MHz BreadCrumb radio is 6 (917 MHz).
Table 3: 5 GHz Radio Channel and Frequencies.
BandChannelCenter Frequency (MHz)Turbo Capability
1495745No
U-NII Upper Band
1525760Static Turbo
(5725 - 5825 MHz
1535765No
/
1575785No
ISM Band
(5725 - 5875 MHz
1605800Static Turbo
1615805No
1655825No
The default channel for a 5 GHz BreadCrumb radio is 152 (5760 MHz). Note that this and some
other 5 GHz channels support a feature called Static Turbo mode. In this mode, the radio binds two
standard 20 MHz channels to obtain a wider bandwidth 40 MHz channel. The end result is
improved throughput and/or communication range for the radio.
Most 5 GHz antennas only support a subset of the 802.11a 5 GHz frequency
Caution
channels the Rajant radio is capable of operating at. Before changing the channel of
a 5 GHz radio, verify that the channel is supported by the connected antenna.
Caution
Since the radios operate at different frequencies, you must be careful to use the
correct type of antenna with each radio. As an example, a 2.4 GHz antenna will not
work with a 5 GHz radio and vice versa.
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BreadCrumb® LX/LX3 User GuideRajant Corporation
Version: 2.9103-100101-001
Table 4: 4.9 GHz Radio Channel and Frequencies.
Channel NumberCenter Frequency (MHz)
204950.0
254952.5
304955.0
354957.5
404960.0
454962.5
504965.0
554967.5
604970.0
654972.5
704975.0
754977.5
804980.0
The default channel for a 4.9 GHz BreadCrumb radio is 40 (4960.0 MHz).
One antenna port per radio is utilized. The antenna ports are accessed through Type N RF
connectors mounted on the LX/LX3 enclosure.
1.3.2 Enclosure
The LX/LX3 enclosure has been designed to operate in extreme conditions. The Ingress Protection
(IP) rating of the enclosure has been tested per IEC 60529. The enclosure has demonstrated
performance compliant to IP67 requirements, providing complete protection against ingress of dust
(6) as well as protection against immersion in water (7).
The external features of the enclosure are shown in Figure 3 and Figure 4.
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