GeoDesy GD-3000 User Manual

PX-P3000E100TP

Users’ Manual 1.5f

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Table of contents

1 Introduction ...................................................................................................................... 4

1.1 What is FSO?........................................................................................................... 4

1.2 Why is it important? ............................................................................................... 4

1.3 Optical Free-space Transmission .......................................................................... 6

1.4 Typical applications ................................................................................................ 7

2 Interfaces for the PX-P3000E100TP and technical specification ................................. 8

2.1 100Mbps TP interface............................................................................................. 8

3 Sites of installation ........................................................................................................... 9

3.1 Key factors of operation ......................................................................................... 9

3.2 Preferred installation sites ..................................................................................... 9

3.3 Distance measurement .......................................................................................... 11

3.4 Direct sunshine ...................................................................................................... 11

4 Eye safety ........................................................................................................................ 12

5 The mounting bracket .................................................................................................... 13

5.1 Fixing the heads..................................................................................................... 13

5.2 Alignment of the heads ......................................................................................... 13

5.2.1 Steps of the head fixation .................................................................................... 13

5.3 Meanings of the LEDs .......................................................................................... 14

5.4 LCD screens ........................................................................................................... 14

5.5 Inside the laserhead .............................................................................................. 15

6 Alignment ....................................................................................................................... 15

6.1 LCD panel (receiver) Aligment............................................................................ 15

6.2 Beam Alignment .................................................................................................... 17

6.3 Set the beam size ................................................................................................... 18

7 System installation ......................................................................................................... 19

7.1 On the table test .................................................................................................... 19

7.1.1 Alignment of the PX3000E100TP ..................................................................... 20

7.1.2 Connecting to your Network ............................................................................... 21

8 Management ................................................................................................................... 22

8.1 Features .................................................................................................................. 22

Login Screen and password ........................................................................................ 22

Head information screen ............................................................................................. 22

Status info screen ........................................................................................................ 23

Device setup ................................................................................................................ 24

IP Setup ....................................................................................................................... 25

SNMP Setup ............................................................................................................. 26

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Security ...................................................................................................................... 27

Network statistics page ........................................................................................... 27

PX-P3000E100TP0 extra MGM features ................................................................... 29

Mandatory Management Activation ........................................................................... 30

8.2 Firmware update ................................................................................................... 31

8.3 Reloading factory default settings ....................................................................... 33

8.4 Setting up the SNMP ............................................................................................ 33

8.4.1 SNMPc Installation ............................................................................................. 34

8.4.2 Configuration of the SNMPc Management console ........................................... 35

8.4.3 Compiling GeoDesy-FSO Mib file ..................................................................... 38

8.4.4 Using SNMP to monitor the link ........................................................................ 40

8.4.5 Generating failure ............................................................................................... 42

8.4.6 SNMP Technology.............................................................................................. 44

Trap event list ........................................................................................................... 51

9 Warranty conditions ....................................................................................................... 52

10 Privacy statement ........................................................................................................... 53

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1 Introduction

1.1 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.

GeoDesy FSO offers FSO systems with the highest power budget available on

the market.

1.2 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.

GeoDesy FSO offers high transmit power and also

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

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To meet the demands for every higher bandwidth, GeoDesy FSO (Europe) Limited
continues to invest heavily in research and development with the newest product line
which offers Gigabit speeds being launched.

This manual describes the GeoDesy FSO Next series of free space laser
transmission system.

The GeoDesy FSO Next product range offers cost effective reliable free space
laser transmission for two Mbps up to 1000 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 GeoDesy FSO devices provides
transparent and wire-speed data transfer with virtually zero latency. Because they

use infrared light as the transmission medium, GeoDesy FSO system do not
require frequency licenses and the transmission is not effected by electro-magnetic

or radio-frequency interference. Basically the GeoDesy FSO 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 GeoDesy FSO X 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

GeoDesy FSO.

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1.3 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

1.4 Typical applications

Most typically the GeoDesy FSO Next products are 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 deployment of the GeoDesy

FSO is the most adequate as a 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
GeoDesy FSO 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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2 Interfaces for the PX-P3000E100TP and technical

specification

2.1 100Mbps TP interface

The GeoDesy FSO X PoE series products are designed to provide easy-to-use
and cost-effective solution for interconnecting Local Area Networks. By utilizing
standard Category 5 cable and using standard IEEE802.3af interface the
deployment of the system is easier than ever before. The transparent and wire
speed data transfer together with virtually zero latency assures the easy integration
of the system in all environments.

The X PoE systems should be considered as repeaters in the network. So the
installation distance between the head and the network device is 100m. The
distance on a back to back site is maximum 5 meters, between the heads without
signal regeneration.

The X PoE systems connecting to the network with an RJ 45 cable which provides
the power required for operation and the data. The system requires IEEE 802.3af
Power over Ethernet switch or power injector. The power consumption suits to the
standards described in the standard. Also provides fast and easy connection for the
management system for more details please see the chapters below. The system is

certified Class 1M product, this way 100% eye safe.

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3 Sites of installation

3.1 Key factors of operation

There are four key issues that the site survey has to shed light on. Proper system
operation cannot be guaranteed without satisfying all of the four requirements.

Clear line of sight - The entire optical path between the two ends must be free

of any obstacles. It not only means that one has to see the other side, but other
possible sources of disturbance should also be taken into consideration. For
example there might be turbulence above the roofs and other constructions, and this
can cause fraction or scattering of the beam or snow accumulation on roofs too
close to the beam can influence or even interrupt communication.

Solid mount surface - is the key for long-term operation. Since the diameter of

the beam is limited, it is extremely important to mount the unit on a stable structure
with the possible smallest movement. This way the receiver of the remote unit
cannot get out of the beam due to the movement of the opposite head.

East-West orientation - although the receiver optics are equipped with optical

filters to protect the receiver diode from the effect of undesired light sources, direct
sunshine can cause saturation of the diode. This prevents the system from working
properly for several minutes a day at certain times of the year. In most cases this
effect can be avoided by careful selection of the mounting spot.

In order to comply with the requirements of the successful installation - including the
discussed four key factors and other criteria - the following matters should be taken
into consideration.

3.2 Preferred installation sites

All buildings and constructions have a certain movement of their own. It’s

determined by the structure and material of the building. Metal structures can shift or
twist due to temperature changes. Wooden construction can expand or shrink with
any changes in humidity. Give preference to concrete or brick buildings. On the
other hand high structures like towers, skyscrapers or poles are always subject to
movement. Mount the support frame to walls of the building or near corners, as they
are the most stable spots. Use appropriate consoles for wall mounting. If a stand is
used on the top of
building, secure it directly to the ceiling or to the concrete cornice wherever is
possible. Do not fix stands to insulating materials as they can slowly sink under the
weight of the unit and with temperature changes. Big chimneys and smokestacks
may look stable, but as their inner temperature varies they can also move. Vibration
caused by heavy traffic, trains and elevators etc. may slowly move the system out of
its specified direction. Another important consideration is to provide enough space
for alignment and to have the potential for future maintenance. Consider that the
support frame is usually heavy, so the selected spot should be easily accessible.

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Preferred installation
sites

Pay attention to

Avoid (*)

Concrete wall

Behind window

Soft materials

Brick wall

Old constructs

Chimneys

Microwave towers

Wooden constructs

Metal masts or Frames

Hidden heat isolations,
like Styrofoam

(*)
In cases where installations are listed under “AVOID” cannot be avoided than special mounting
accessories to be designed and special installations must be used.

It is not only the building that has to be solid, but the support structure too. Antenna
poles and security camera holders are not suitable for the GeoDesy FSO units.

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3.3 Distance measurement

Because the units were designed, and calibrated for certain distance operations the
higher distance will decrease the availability. GeoDesy FSO pre-calibrates and pre­tests every unit shipped to the customer. To ensure that the unit you are about to

buy fits to the needs, the first step
is to measure the distance. The
best way to measure it is by GPS
(Global Positioning
System), these units
are accurate enough to
determine the distance
between two points.
For more details
please refer to the
GPS manufacturer
handbook. Also there are several
other ways to measure the
distance. If you know the exact

address you can use mapping software like MapPoint or Auto route.

3.4 Direct sunshine

To prevent the sun
shining directly into the
receiver optics, first one
has to determine the
orientation of the link.
Try to avoid East-West
orientation wherever it is
possible. Examine both
sides of the link at
sunset and sunrise and
find a position where the
sun cannot get behind
any of the heads. Be aware that the path of the sun is changing throughout the year.

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Type : LB PX-P3000E100TP
S/N : LBH-«s/n»

Input Power : -48VDC IEEE 802.3af compilant
Laser : 1M
Wavelength : 860nm

Manufactured by: GeoDesy FSO 1162 Budapest,

Kondorfa u. 6-8, HUNGARY, Tel.:[phone] Fax.:[phone]

www.GeoDesy FSO.com

INVISIBLE LASER RADIATION

DO NOT VIEW DIRECTLY WITH

OPTICAL INSTRUMENTS

CLASS 1M LASER PRODUCT

4 Eye safety

There are no two installation spots of the same kind, the buildings or structures, the
available space and the accessibility of the place will be different in each case.
Nevertheless, as a general rule it is very important to select the installation site so
that nobody can look directly into the transmitter. For this reason place the head
either so high (on the side wall of the building) or so close to the edge of the building
(on a parapet on the rooftop) that no person can approach it accidentally and can
get into the beam path. Set up barriers if necessary and put warning signs at
prominent places.
The laser heads are provided with all labels and hazard warnings required by the
laser standard. There are warning labels on both the left and right side of the
protective cover next to the optical window and there is a warning and an informative
label on the rear side of the laser head.

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5 The mounting bracket

5.1 Fixing the heads

Your PX-3500E100TP head can be fixed to its
stand with an Alignment Base Unit (ABU). On the
figure you can see an ABU, and a plinth of a PX­3000E100TP unit, and the necessary fixing parts.
The necessary nuts and washers can be foubd on
the legs of the head. The steps of the fixing are.

 First, fix the Abu to the stand using the

washers and nuts

 Place the head to the ABU
 Fix the bolts with the nuts, using the

washers

 Tight up all the nuts

5.2 Alignment of the heads

5.2.1 Steps of the head fixation

 Target Side B with the crosshair bulit in to the

head on Side A!

 Screw the two nuts up tight on both heads,
which are used for the fixing the vertical direction, but
be careful that the heads do not move out from its
position!

 Screw the three nuts up tight on both heads,
which are used for the horizontal fixation, but be
careful that the heads do not move out from its
position!

 Repeat this on the other side of the link!

 Place up the spacers on both sides!

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Place the two spacers where the figure shows to.

Open the spacers until it reaches the bottom of the
upper plate of the ABU! Repeat this on the back side
too!

Then do the same on the remote side too!

5.3 Meanings of the LEDs

Power: The head is powered up.
RX-OK: Received beam is good for

communication.

TP Lk: Copper link between the head and the Network equipment.
FO Lk: The recived signal form the remote end is modulated and .
R-V/TP: Remote end is visible for the management system and there is TP

connected to remote end – same as TP-Lk but displays it on the remote end.

5.4 LCD screens

Please press the button on the backside of the unit to scroll between the screens!

1.screen

Loc (local level): Light received from the remote end.
Rem (remote level): Remote Sites Received level.
Op: optimal
Ov: overload

2.screen

HeadSN: The laser head serial number
0000001

3.screen

Temperature: Temperature inside the laser head.
TT°C

4.screen

[e-mail]

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5.5 Inside the laserhead

Warning only trained personal should open the casing. No user servicable part

inside.

6 Alignment

The very first step is to power up the heads. After this the boot sequence should run
down, which takes 10-15 seconds.

6.1 LCD panel (receiver) Aligment

Important! For alignment purposes you might need a computer connected to the

system. The adjustment of the motor control, and the swithcing of the transmitters
are possible with a PC.

For adjustment please see PX-3000E100TP extra MGM functions chapter.(30 page)

For manual disabling please follow the below:

 Turning off the motor control: Restart the laser head during boot and pull out

the plug while booting. After plugging in the motor controler will turn off.

The motor control is a “light-buffer” this saves the power for the bad weather and in
the same time protects the receiver against overload.
During the alignment it can be used manually, to avoid the saturation, and keep the
detector voltage on the level where it can be still monitored. The detector voltage

can be increased to seven volts; above seven volts you won’t be able to monitor the

detector voltage.
This plate is located in front of the receiver, and you can rotate it (clockwise
decreases the detector voltage, counter- clockwise increases).

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 Follow the steps below

1. Switch on one of your transmitter on one side, and switch off all the
others.

Switch off the transmitters on the other side too. You can adjust the
transmitters only in the management. Please take a look at the PX­3000E100TP extra MGM features chapter.(30 page)

You can check which transmitter is in use, in the management (refer to page 30)
with the Local level LEDs of LCD on the back of every transmitter.
Each LED indicates the transmitters are functioning, and transmitting.

2. Move the head with the off switched transmitters until you can get the
biggest incoming light effciency on the other side.

3. Fix the head as hardly as you can!

4. Repeat this with the other head too.

The receiver alignment should be done on both sides; the requirement is some
incoming light from the remote side (at least receive). This alignment will determine
the position of the head and in the position of the receiver. The idea is similar to the
focusing, but the only way to find focus is to move the head. You can check the
incoming light efficiency in two ways. You can use the level on the LCD screen.

On the LCD screen you can see the remote level of the other Laser Head!

Because of the weight of the heads for the
vertical moving you can use the spacers as it is
shown on the figure. For this moving you need
two wrencches. With one of them you have to
hold the head of the bolt, and with the other you
can turn the thick nuts to lift or loose the plate of
the ABU!

To not enable any movement after the receiver
alignment on the vertical angle of the head and
due to the heat expansion please close the
locking nut under the thick nut, as it shown on
the figure, on both sides.

Please not before the vertical reciver alignment we strongly suggest doing the
horizontal the same way as it is written above.

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