BlackBox LWU0200 User Guide

LWU0200

Power over Ethrenet

Users’ Manual 1.0

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Laser safety regulations for Black Box FSO

communication systems

Black Box FSO series is a Class 1M Free Space Optical Communication System It may be installed in

Unrestricted Locations, areas that are normally accessible to the public; (e.g., unrestricted areas of rooftops, public areas at ground level, open areas of offices and industrial premises, etc).

Restricted Locations

areas that are normally inaccessible by the public - including workers, visitors, and residents in the immediate environs - by means of any administrative or engineering control measure but that is accessible to authorized personnel; (e.g. maintenance or service personnel including window cleaners in exterior locations that may not have laser safety training)

Controlled locations

locations where any kind of engineering or administrative control measure is introduced to make it inaccessible except to authorized personnel with appropriate laser safety training (e.g., tower mounted terminals, fenced/secure areas of rooftops, locked rooms with strictlycontrolled access, etc.).

For additional details, please refer to IEC 60825: SAFETY OF LASER PRODUCTS Part 12: (Safety of free space optical communication systems used for

transmission of information.)

Installation Restrictions for unrestricted areas:

To install a Black Box FSO system in an unrestricted location, the link head must be installed 3 meters high or higher above the surface of the unrestricted area or must be 1 meter or closer to the edge of the unrestricted area. If a Black Box FSO system is installed in an unrestricted area, a warning sign must be posted that states. Do not use optical aids to view the FSO link heads.

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Installation Restrictions for Restricted areas:

There are no special requirements for a Black Box FSO system installed in a restricted area.

Installation Restrictions for controlled areas:

No special requirements for a Black Box FSO system installed in a controlled area.

The laser system shall be installed in accordance with ANSI Z136.1 control measures (engineering, administrative, and procedural controls).

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1 Table of contents

1 Table of contents________________________________________________________ 4

2 Introduction ___________________________________________________________ 5

2.1 What is FSO? ______________________________________________________ 5

2.2 Optical Free-space Transmission______________________________________ 7

2.3 Typical applications ________________________________________________ 8

3 The product BlackBox ___________________________________________________ 9

4 Content of the package__________________________________________________ 11

5 Sites of installation _____________________________________________________ 11

5.1 Key factors of operation ____________________________________________ 11

5.2 Preferred installation sites __________________________________________ 12

5.3 Direct sunshine ___________________________________________________ 14

6 Eye safety ____________________________________________________________ 14

7 The mounting bracket __________________________________________________ 15

8 System installation _____________________________________________________ 16

8.1 On the table test___________________________________________________ 16

8.1.1 Fixing the heads________________________________________________ 18

8.1.2 Alignment of the heads __________________________________________ 19

8.1.3 Connecting to your Network ______________________________________ 21

8.1.4 How can you install the ODIU? (only in case of E1) ___________________ 23

8.1.5 Connecting to the management (only in case of E1)____________________ 26

9 Warranty conditions ____________________________________________________ 27

10 Appendix A _________________________________________________________ 29

a. Product registration form_____________________________________________ 29

b. Failure report form __________________________________________________ 30

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2 Introduction

2.1 What is FSO?

FSO is free space optics provides point-point broadband communications using

Laser Light as the transmission medium.

FSO is a state of art data communication method which is based on a very old

communication solution. Ancient Chinese developed a protection system against the Mongol tribes, building watchtowers within the line of site to other towers. And as soon as the towers saw some hostile sign on the horizon they use they shield to reflect the sun to the remote towers. In this way the area could be prepared against

the attack in a very short period of time.

In the ancient times for this communication use the mirror as a transmitter and the sunlight was the light source, and the receiver was the remote guard’s eye. This basic signalling method was developed later into up communication device which used „line coding”. This allowed the guards to tell the number of enemy, or the direction they are coming from.

Current FSO systems use a laser-diode as a light source, and a receptor diode (photo diode) to receive the signals coming from the laser diode from the transmitter side. But the basic elements are still the same: line of site between

the communication nodes, and individual line coding. It is all about performance. BlackBox offers FSO systems with the highest power budget available on the

market.

Why is it important?

Because of in the ancient Chinese times, the rain, the fog, or even the cloudy weather, could impact the operation of the whole system.

In the FSO units, comprising light source and receiver the cloud problem was solved, but development conditions still can impair performance. To go throw the rain, the fog, or snow you need more and more power to be seen from the remote side. Achievable power levels are limited by a number of factors including eye safety.

In this way there is no other choice to see more than „training the eye”. Making the receiver more and more sensitive to sense delight emitted from the remote side. BlackBox offers high transmit power and also very hard

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receiver sensitivity. These two factors combined to provide one of the best performing FSO systems on the market today.

This manual describes the BlackBox product of free space laser transmission system. The BlackBox product offers cost effective reliable free space laser transmission for 100 Mbps data to the air, where a clean line of site is available. It delivers the most effective point-to-point connection between computer networks or telephone exchanges. No need for installing cables, no rental costs, no licensing requirements.

Ideal for urban areas or city centres, where the use of these lines are expensive. Suitable for factories or industrial environments where high noise level can interfere with the transmitted data. The best choice to make a connection across rivers and other natural or artificial obstacles, where cable is not available.

The transmission technique used in the BlackBox FSO devices provides transparent and wire-speed data transfer with virtually zero latency. Because they use infrared light as the transmission medium, BlackBox system do not require frequency licenses and the transmission is not effected by electro-magnetic or radiofrequency interference. Basically the BlackBox link can be considered as a virtual fibre in the air, which ends in real fibre optic cable at both ends. Our product is built using high quality components for operation in even the most adverse conditions.

Metal housing gives robust, waterproof environment for the electronics. The shield protects the device from direct sunlight and provides extra air isolation. The BlackBox systems comprise two laser-heads and the two indoor interconnection units (OIU) - one at each end. The interface connections are housed in the outdoor unit together with the PSU of the system.

Best practises were employed in cost engineering throughout the development of BlackBox .

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2.2 Optical Free-space Transmission

The principle used in free space laser transmission is very similar to the one is used for fibre optic transmission. The difference is while fibre optic devices use electronics and optics optimized for transmission to the air. Also one can observe to the similarity in the transmission properties. No galvanic contact, no ground-loops, no need for surge protection, noise immunity, long distances, high bandwidth.

What makes it unique – and difficult to design – is that it does not require any transmission medium like fibre or copper, but it has to cope with the dynamically changing parameters. For instance while the attenuation of an optical fibre is constant, the attenuation of the atmosphere between the laser units can change dramatically (depending on the weather conditions). The laser-heads are usually placed on top of building, where the clean line of site is guaranteed and the beam cannot be interrupted.

In the head the incoming signal is amplified, encoded, and then drives the laserdiode. The transmitter optics assures the proper beam shape and controls the beam divergence. The receive optics perceives and directs the transmitter signal to the photo diode. The diode converts it back into electrical, than it is decoded, amplified and converted.

There are several things that can influence the quality of transmission. We can classify those factors into three main groups. System conditions - transmitting power, transmitter’s wavelength, beam divergence, receiver optics diameter, receiver sensitivity, parameters of optical system and casing. These parameters determine the system’s characteristic at a certain distance and are controlled by system design and factory set up.

Weather conditions - molecular absorption, particle scattering and turbulence. These elements have great effect on the operational conditions of the system. We do not have very much influence on them; proper product selection can eliminate the undesirable effects.

Environmental conditions - building movements, direct sunlight, refractive surfaces. These are also key factors related to the installation sites and can be controlled by appropriate site survey and system installation

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Corporate

LAN

ISP

2.3 Typical applications

Most typically the BlackBox is used to interconnect LAN-s. The system is protocol transparent, thus other applications also can be taken into consideration. Appropriate interface converters are needed and system bandwidth must be matched for that. Here we collected some circumstances, where the employment of the BlackBox is the most adequate and cost effective solution.

Those are:

Areas with natural or artificial obstacles

Where cable is actually not an alternative, like across rivers or railways or in rugged terrain.

Urban areas

Where only leased lines are available with limited speed, and high rental cost. With Black Box links you can establish on line LAN-to-LAN connections.

Industrial areas

Where you have noisy environment with high EMI or RFI. Factory buildings, airport objects can be connected through laser link.

ISP connections

Where high bandwidth is required. ISP’s can offer high-speed links to their customers or trunks can be established between ISP’s instead of expensive leased lines.

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3 The product BlackBox

The BlackBox series products from BlackBox set a new standard for Free Space Optical transmission systems. They provide simple and easy to installation solution that is unique in laser based networking. This new range of products incorporates a lightweight, compact mechanical design with a factory-set optical system, which allows end-users to benefit from simple and quick installation. The BlackBox is more competitively priced than 2.4 GHz radio solutions and the bandwidth provided can be about ten times higher. BlackBox range offers cost effective, reliable and secure laser based free space optical transmission for local area networks (LAN) at full duplex Fast Ethernet wire speed. The transmission carries data using a concentrated laser beam and a unique modulation technique is employed to ensure error free data transfer over distances of up to 200 meter. Transparent and wire speed data transfer together with virtually zero latency ensures that the BlackBox system can be easily integrated into any environment. The BlackBox series use laser light as a transmission medium. As with all BlackBox systems this means that frequency licenses are not required and transmission is not affected by electro-magnetic interference. The data transmission via a laser beam is secure as it is extremely hard to intercept, and cannot be detected by spectrum analysers. In the case of a BlackBox system the laser link is considered a “virtual” fibre in the air.

The BlackBox system comprises of two Laser Heads, two Outdoor Interconnection Units (OIU) and two sets of interconnection cables — one at each end. The Laser Heads are installed outdoors, usually on rooftops or sidewalls of buildings, where a clear optical path exists between the two sites. Next to the head the Outdoor Interconnection Unit provides fast and easy interconnection between the laser head and the cable coming from the network equipment. Moreover the OIU houses the Power Supply Unit (PSU) of the system and the network interface. The PSU provides the low voltage power required to operate the laser. Each BlackBox head contains built-in transmission monitoring service, which features a visual signal strength indicator and LINK status information accessible on the rear side of the head assembly through a window. In addition BlackBox units are equipped with optical aid to target the remote head easily. All that makes the installation real fast and easy even for people who have never dealt with FSO equipment before

By utilizing IEEE, and ITU standard compliant interfaces BlackBox system protects the customers’ investments in long-term projects. Provides fast and easy connection for Fast-Ethernet, or PDH computer or telephone networks.

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