ELSA AirLancer MC-2 User manual

Manual
M
ELSA AirLancer
TM
MC-2
M
ELSA AirLancer
TM
ISA-2

© 1999 ELSA AG, Aachen (Germany)
While the information in this manual has been compiled with great care, it may not be deemed an assurance of product
characteristics. ELSA shall be liable only to the degree specified in the terms of sale and delivery.
Thereproductionanddistributionofthedocumentationandsoftwaresuppliedwiththisproductandtheuseofitscontents
is subject to written authorization from ELSA. We reserve the right to make any alterations that arise as the result of
technical development.
Trademarks
Windows®, Windows NT®and Microsoft®are registered trademarks of Microsoft, Corp.
All other names mentioned may be trademarks or registered trademarks of their respective owners. The ELSA logo is a
registered trademark of ELSA AG.
Subject to change without notice. No liability for technical errors or omissions.
Aachen, September 1999
ELSA AG
Sonnenweg 11
52070 Aachen
Germany
ELSA, Inc.
2231 Calle De Luna
Santa Clara, CA 95054
USA

Preface
Thank you for placing your trust in this ELSA product.
Wireless networks from ELSA are economical alternatives or additions to local wired
networks (LANs). Notebooks and PCs can use mobile network cards to communicate
withoneanotheroraccesswirednetworksviabasestationsandcanevenbeintegrated
into the ISDN network.
This documentation is intended for the user of the
ELSA AirLancer MC-2 and ELSA
AirLancer ISA-2
mobile network cards. First we describe the devices and their options,
then provide instructions for installing the devices and the drivers and as an initial
application example we describe how to connect two computers with each other and to
a base station.
Documentation
The accompanying documentation comprises:
KInstallation Guide
Hardware installation and configuration examples
KCD containing electronic documentation
All product manuals, basic technical information (e.g. wireless networks, general
networking technology, TCP/IP etc.), workshop with detailed examples of
applications, reference section for general information including a complete
description of the menus
Ouronlineservices(Internetserverwww.elsa.com)areavailabletoyouaroundtheclock
shouldyouhaveany queriesregardingthetopics discussedinthismanual orrequireany
further support. In the Support file section under 'know-how', you can find answers to
frequently asked questions (FAQs). The KnowledgeBase also contains a large pool of
information. Current drivers, firmware, tools and manuals can be downloaded at any
time.
The KnowledgeBase can also be found on the CD. Just open the file
\Misc\Support\MISC\ELSASIDE\index.htm.
English

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Introduction
The advantages of wireless LANs are obvious: Notebooks and PCs can be set up where
theyarewanted—problems with missing portsor construction alterations areathing of
the past with wireless networking.
Networklinksinconferencesor presentations, access toresourcesinadjacentbuildings
and exchanging data with mobile units are only a few of the options available with a
wireless LAN.
The base station plays the central role in enabling these options in an existing wired
network. All stations in the wireless network access the LAN via the base station.
What does a wireless network card really do?
WLAN
A wireless network card is used to link individual notebooks and PCs to a local network,
a Local Area Network (LAN). Because the standard network wiring belonging to a
conventionalLANisreplacedbyaradioconnection in this LAN,thesewirelessnetworks
are also referred to as a Wireless Local Area Network (WLAN).
Allthe functions of a wired network are available ina wirelessnetwork: Access to files,
servers, printers etc. is possible as is the integration of the mobile stations into an
internal company e-mail system.
Radio transmission
IEEE 802.11
Wireless network cards from ELSA operate under IEEE Standard 802.11. This standard
is a supplement to the current IEEE standards for LANs, with IEEE 802.3 for Ethernet
beingthemostwell-known. IEEE802.11coverstheoperationof localwirelessnetworks
onprivateandpublicpropertyintheISMfrequencyrange(Industrial,Scientific,Medical:
2.4 and 2.483 GHz).
Please note that not all frequencies are permitted in every country! A table of the
frequencies is given in the appendix.
2 Mbps
The maximum bandwidth for data transfer is 2 Mbps. The transfer range in the open is
up to 300 meters, in buildings it is typically around 30 meters.
DSSS
The wireless network cards from ELSA use the DSSS process (Direct Sequence Spread
Spectrum) to shield against interference from other transmitters that may be using the
same frequency range. A transmitter normally uses only a very narrow range of the
available frequency band for transfer. If precisely this range is also in use by another
transmitter, this will cause interference in the transfer. In the DSSS process the
transmitterusesabroadersectionofthepossiblefrequencybandandsoislesssensitive
to narrow-band interference. This process is also used by the military to make

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eavesdropping more difficult. In this process data are “chopped up” and spread over a
wide frequency band, ensuring a reliable eavesdropping-proof transfer.
Applications
Two basically different application options can be selected with the wireless network
cards from ELSA:
Direct PC
connection
Usethe wireless network cards tolink two or more computersdirectly. All computersin
a WLAN can then communicate with one another with no additional hardware.
Peer-to-peer
Thisapplicationisgenerallyreferredtoasapeer-to-peernetwork;however,inthejargon
of wireless networks this type of networking is referred to as an ad hoc network.
Connection to
wired LAN
Allcomputerswithwirelessnetworkcardsareabletoaccessawirednetworkviaabase
station. Thebase stationacts asthe connectionbetween theLAN andthe WLANand it
also forms the switching center for data traffic within the WLANs.
Peer-to-LAN
Awirelessnetworkwithabasestationisgenerallyreferredtoasapeer-to-LANnetwork;
however, in the jargon of wireless networks this type of networking is referred to as an
infrastructure network.
Ad hoc network
Infrastructure network

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This network type is ideally suited as an addition to existing LANs. The infrastructure
networkistheidealsolutionforexpansionofaLANinareaswherewiringisnotpossible
or not economical.
Introducing the ELSA AirLancer
PC card
Thewirelessnetworkcard
ELSAAirLancerMC-2
isdesignedasa PC card. In contrastto
other PC cards,
ELSA AirLancer MC-2
has an antenna extending beyond the base of the
card.
LEDs
The antenna has three LEDs, which provide information on the status and the activity of
the card:
KThe red LED indicates that the PCMCIA slot is active and that the card driver was
successfully loaded.
KThe yellow LED indicates that the wireless network card is logged on to a base
station.
KThe green LED shows the activity on the wireless network, i.e. transmission and
reception of data packets. If this LED is not lit or is permanently lit, the wireless
network card is faulty.
ELSA AirLancer MC-2
can be inserted into a free PCMCIA slot. If you use the wireless
network card in a desktop PC, you will need an adapter.
ELSA AirLancer ISA-2
includes an adapter for PCI slots.
The wireless network cards in the PCMCIA slots, the PCI adapter and the base stations
are interchangeable. Therefore, if you do not require the PC card on a desktop PC for a
period, you can easily install it in another notebook.

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Installation
Theaimofthischapteristogetyouonlineasquicklyaspossible. Youarethereforegiven
a brief description of the hardware installation and the driver installation under various
operating systems.
System
requirements
Your computer must fulfill the following requirements for the installation:
KWindows 95, Windows 98 or Windows NT 4.0 (i386) operating system
KCD-ROM
KFree ISA slot (desktop PC)
KPCMCIAtypeIIortypeIIIslot,correctlyinstalledintheoperatingsystem(notebooks)
Data media
During installation, files may be required from the data media which you used to install
your operating system and network client, if applicable. Have the appropriate diskettes
or CDs ready.
System settings
To enable full usage of the functions of the wireless network, the TCP/IP protocol must
be installed. In addition, the NetBEUI network protocol is required for Windows
networks in the ad hoc mode.
Install ELSA AirLancer ISA-2
aSafety First! Disconnect the power cord from the PC before opening the housing.
bLoosen the retaining screws on the housing lit and remove it.
cRemove the blind bracket of a free slot.
dInsert the
ELSA AirLancer ISA-2
card (without
ELSA AirLancer MC-2
) into this slot,
and screw down the sheet metal of the card. Replace the PC housing and screw it
tight.
eReconnect the power cord to your computer and switch the computer on.
Installation under Windows 95 and Windows 98
Almostallthewindowsappearingonyourscreenduringinstallationcanbeconfirmedby
clickingontheOK,FinishorNextbuttons. Thefollowinginformationshowsyouexactly
where you will need to take any special steps.
If the files are not found on the Windows CD during installation, try to find them in the
subdirectory D:\win95 or D:\win98 or D:\windows.

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Install driver for ELSA AirLancer ISA-2
aIf your computer does not automatically search for new hardware after restarting,
startthehardwaredetectionmanuallywithStartESettingsE ControlPanelE
Hardware. Follow the directions of the hardware wizard and start the search for
new hardware components. This may take several minutes.
bOnce the hardware detection has finished, use the Details button to check whether
a 'PCIC-compatible PCMCIA adapter' has been found. Continue with the
installation.
cIn Windows 98 answer the questions of the 'PC Card Wizard'. In general, you can
answer the questions regarding any other existing PC cards and the system files
check with No.
dRestart your computer after copying the required files.
Install driver for ELSA AirLancer MC-2
aInsert
ELSA AirLancer MC-2 into the free PCMCIA slot of a notebook computer or
into the PCMCIA adapter
ELSA AirLancer ISA-2 . Note the marks to ensure that the
card is in the correct position. The card will be recognized automatically and all
required drivers will be set up.
Depending on your Windows version, the hardware detection process takes place
as follows:
dWindows now copies the required driver files.
Windows 95,
version 4.00.950 Windows 95, version 4.00.950 B Windows 98
bWindows 95 reports
'New Hardware Found'.
Select Driver from disk
provided by hardware
manufacturer.
Windows 95 starts
'Update Device Driver
Wizard' and selects the
driver for you.
Windows 98 starts the
'Hardware Installation
Wizard' and offers you
two different ways of
searching for drivers.
Selectthe'Searchforthe
best driver for your
device' option.
cThedriversforthecardareonthe
ELSALANCOM -CD.
Switch to the next window in the main directory in
your CD-ROM drive (e.g.: D:\).
In the next window acti-
vatetheoption'CDdrive',
insertthe
ELSALANCOM
CD into the drive, and
confirm with Next.

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After installing the drivers check whether the parameters for the wireless network (e.g.
for ad hoc network or infrastructure network) are set correctly for your application (see
also 'Configuration Examples').
Installation under Windows NT 4.0
Before installing the driver you should ensure that you have system administrator
authorization. OtherwiseyouwillnotbeabletoinstallthedriverusingWindowsNT4.0.
The subsequent operation of the card is also possible with user rights, of course.
The NT network support for TCP/IP is required to operate ELSA AirLancer MC-2 under
Windows NT.
Install driver for ELSA AirLancer ISA-2
aStarttheinstallationwithStartESettingsEControl PanelEDevices. Select
the entry PCMCIA and change the entry Start Type to 'automatic'. Confirm with
OK and start the device by clicking the Start button with the mouse.
bAfterwardschooseStart ESettingsEControl Panel EPC card (PCMCIA). If
the driver for
ELSA AirLancer ISA-2 has not been properly loaded, you will find the
entry '(Empty) - Socket 0' here.
Install driver for ELSA AirLancer MC-2
When installing under Windows NT 4.0, check whether the required system resources
are available.
ELSA AirLancer MC-2 will be installed with IRQ 10 and the address 200 -
240 by default. The interrupts and addresses can be viewed under Start EPrograms
EAdministrative Tools (Common) EWindows NT Diagnostics.
If the required resources are not available, please make a note of other free resources
and specify them during the installation. It is also possible to change the resource
allocations at a later time with Start E Settings EControl Panel ENetwork E
Adapters EProperties.
aInsert
ELSA AirLancer MC-2 into the free PCMCIA slot of a notebook computer or
into the PCMCIA adapter
ELSA AirLancer ISA-2 . Note the marks to ensure that the
card is in the correct position.
bStarttheinstallationwithStartESettingsEControlPanelENetwork. Select
the Add button on the 'Adapter' register tab.
cIn the 'Select Network Adapter' window select the Have disk... button,and enter
the path to your CD drive (e.g. D:\).
dCheck the settings of the wireless network card.

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– Activate the option Infrastructure if you wish to set up a connection to a base
station with the wireless network card (peer-to-LAN).
– ActivatetheoptionStandardifyouwishtosetupadirectconnectiontoanother
computer with the wireless network card (peer-to-peer).
eFinish the installation and restart your computer.
After installing the drivers check whether the parameters for the wireless network (e.g.
for ad hoc network or infrastructure network) are set correctly for your application (see
also 'Configuration Examples').

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Example configurations
In this chapter we present two examples of the use of ELSA AirLancer MC-2 .
Additionalapplicationexamplesandinformationonconfiguringthebasestationscanbe
found in the electronic documentation on the CD.
Direct PC connection
Even small companies, branches and offices with small numbers of employees are
increasingly using their computer workstations not simply as isolated solutions but they
are also linking the individual computers, printers etc. to form a common structure, a
network.
The Windows operating systems, used in most cases, include everything required for
connectingseveralcomputerstoanetwork. ThewirelessnetworkcardsfromELSAeven
makeitunnecessarytowirethecomputerstogether. AsmallWindowsnetworkinwhich
every computer can have “wireless” access to the released files, folders and printers on
the other computers can be set up very quickly.
For example: In an architect's office
Weshalltakeasmallarchitecturalofficeasan exampleofapeer-to-peernetwork(orad
hocnetwork). Twoarchitectsandoneassistantworkinthe office. Eachofthethreehas
a desktop PC, and a printer, used by all three, is connected to the assistant's computer.
The two architects also have notebook computers to keep them up to date with outside
appointments. It should be possible to exchange data between the notebooks and the
desktop PCs and the notebooks should also be able to access the printer quickly at any
time.
In this case all computers are fitted with
ELSA AirLancer MC-2 wireless network cards,
and the desktop PCs are also fitted with the
ELSA AirLancer ISA-2 PCMCIA adapters.
Ad hoc network

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Setting up the
wireless
network cards
Toenablethewirelessnetworkcardstodetectoneanotherandexchangedatawithone
another, the various parameters must have the same values.
OpenthenetworkneighborhoodwithStartESettingsEControlPanelENetwork.
Highlight the entry 'ELSA AirLancer MC-2' and choose the properties. Open the register
card 'Advanced' and check the values displayed:
KChannel (from 1 to 13) must be set the same for all computers in the wireless
network; it can be left at the default setting 'Channel 11'.
By selecting another channel you can operate different wireless networks adjacent
tooneanother. Therearetheoretically14differentchannelsavailable,butbecause
of the frequency overlapping in the DSSS process only three channels can be
implemented without overlapping (1, 6, 13) to operate adjacent to one another
without interference caused by superimposition.
Please note that not all channels in all countries are available for private use (see table
with radio channels in the appendix).
KLLC Type remains at 'IEEE 802.11' for all computers.
KOperating Mode is set to 'ad hoc' in a peer-to-peer network.
KPacket Size remains at the default value of '1550' for all computers.
At Packet Size you set the length of the individual data packets that are sent over
the wireless network. Values from 50 to 1600 bytes are possible. Larger packets
must be taken apart before transfer (fragmented) and reassembled at the receiver
(assembled).
Smallpacketscanallowmorereliabletransfersininterference-proneenvironments,
but the proportion of useful data to management information is less.
KWLAN Domain can be freely selected. This value must also be the same for all
computers and base stations in the wireless network.
Changethisvalueonallradiostationsfromthedefault'ELSA'toanyothervalueassoon
aspossible,becausetheWLANDomainisusedtoprotectyourwirelessnetworkagainst
unauthorized access as with a password.

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Operating
system settings
After installing and setting up the drivers for
ELSA AirLancer ISA-2
and
ELSA AirLancer
MC-2
in all computers, there are still some components to be set up in the operating
system.
KNetwork protocol
ThenetworkprotocolsTCP/IPandNetBEUIarerequiredtoimplementapeer-to-peer
networkwiththewirelessnetworkcardsfromELSA. Installtheprotocolsiftheyare
not already installed and check the protocol links to the
ELSA AirLancer MC-2
wireless network card in the control panel.
KClient
The Microsoft network client is required to permit all of the workstations in the
Microsoft network to log on with names and passwords.
KCapab.
File and printer sharing permits drives and printers to be shared with other users in
the Windows network.
KName and group designation
Click Start ESettings EControl Panel ENetwork and switch to the
Identification tab.
Thenameoftheworkstationmustbeunique. Namesalsomaynotrecurindifferent
groups.
The workgroup must be set the same for all computers that are intended to
exchange data and resources.
KFile and printer sharing
Ensure that file and printer sharing is enabled after the installation is complete.
Click Start ESettings EControl Panel ENetwork EFile and printer
sharing. Specify whether other users in the Windows network should be allowed
access to the printer and/or files of this workstation.

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In the Windows Explorer, right-click the drives, folders or printers that you would
like to share with others on the network and select the item Sharing... from the
context menu.
Enter a name for the shared resource and a description if required. The manner in
which the resource can be accessed can be selected under Access Type, and by
entering passwords as required.
It'seasy to check whether theWindows network settingshave been made correctly: the
local computer must appear with its name in the Network Neighborhood.
Access to other
resources
Shortly after a computer has been started in a Windows network, the user can see the
names of all other currently accessible computers in the network in the Windows
Explorer Network Neighborhood (including the user's own computer).
The released folders and files are as easily accessible in Explorer as the hard disks and
drives in the user's computer.
Link to a local network
Aswellassettingupindependentnetworks,the second great advantageofthewireless
network is the ability to expand existing wired networks. It makes no difference here
whether the existing LAN is to be extended but wiring the new workstations is
uneconomical or impossible or whether, for example, external employees should have a
mobile link to the LAN during an internal assignment.
For example: In
the marketing
department
Weshallusethemarketing department of amedium-sizedcompanyasan example for a
peer-to-LAN network. The marketing employees are transferred to another floor.
Becausethey are working externally most of the time inany case,the new workstations

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will not be full wired but only an access point to the company LAN will be established
with a
ELSA LANCOM Wireless L-2 base station.
Everymarketingemployeereceivesa
ELSAAirLancerMC-2 wirelessnetworkcardforthe
notebook computer so the employee can log into the company network while in the
office. To enable the marketing employees to print, there is also a network printer
connected to the LAN in their office.
Setting up the
wireless
network cards
To enable the wireless network cards in the notebooks to log on to the base station and
exchange data with the LAN, the various parameters must have the same values as the
wireless network card in the base station.
Open the Network Neighborhood with Start ESettings EControl Panel E
Network. Highlight the entry 'ELSA AirLancer MC-2' and choose the properties. Open
the register card 'Advanced' and check the values displayed:
KChannel (from 1 to 13) must be set the same for all computers in the wireless
network; it can be left at the default setting 'Channel 11'.
KLLC Type remains at 'IEEE 802.11' for all computers.
KOperating Mode is set to 'infrastructure' for all computers in the peer-to-LAN
network.
KPacket Size remains at the default value of '1550' for all computers.
KWLAN Domain can be freely selected. This value must also be the same for all
computers.
Changethisvalueonallradiostationsfromthedefault'ELSA'toanyothervalueassoon
aspossible,becausetheWLANDomainisusedtoprotectyourwirelessnetworkagainst
unauthorized access as with a password!
Infrastructure network

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Youcanfind information onconfiguringthe basestationsin thedocumentationfor ELSA
LANCOM Wireless IL-2 and ELSA LANCOM Wireless L-2 and in the electronic
documentation on the CD.
Access to the
LAN
After setting up the wireless network cards, all functions and services available on the
desktop PCs in the wired network will be available for the marketing employees with
their notebook computers:
KFile server (Novell, NT or other)
KNetwork printer in the marketing department
KInternal company mail system (e.g. Lotus Notes)
KInternet through the LAN

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Appendix
Technical data
Radio channels
Every one of the 14 radio channels that can be set for a wireless network has a breadth
of22MHzwiththeuseofDSSS. Thisenablesamaximumofthreemutuallyindependent
channelsintheISMfrequencyband. Thetableshowsthemediumfrequenciesandwhat
channels are permitted in what country.
Frequency band 2400-2483.5 MHz (ISM)
Datatransferrate 2 Mbps (with an alternative option of 1 Mbps, automatic rate selection)
Range Up to 300 meters in the open, approx. 30 meters in enclosed structures
(typical range)
Antenna 2dBi dipole antenna
Bit error rate Better than 10-5
Standard IEEE 802.11, DSSS (Direct Sequence Spread Spectrum)
Operating sys-
tems Windows 95, Windows 98, Windows NT 4.0 (Windows 2000, Windows CE in preparation)
Connects
ELSA AirLancer MC-2 ELSA AirLancer ISA-2
PC card (PCMCIA Type II) ISA bus
Package con-
tents Elaborated documentation in German, English, French and Italian
Service Warranty: 1 year
Support: via hotline and Internet
Channel no. Medium frequency [MHz] EU (ETSI) Spain France
1st radio band
channel 3
12412X
22417X
32422X
42427X
52432X
2nd radio band
channel 8
62437 X
7 2442 X
8 2447 X
9 2452 X
10 2457 X X X
3rdradioband
channel 13
11 2462 X X X
12 2467 X X
13 2472 X X
14 2484

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Warranty conditions
The ELSA AG warranty, valid as of June 01, 1998, is given to purchasers of ELSA products in addition to
the warranty conditions provided by law and in accordance with the following conditions:
1 Warranty coverage
a) Thewarranty coverstheequipment deliveredand all itsparts. Parts will, atour sole discretion,be
replaced or repaired free of charge if, despite proven proper handling and adherence to the
operating instructions, these parts became defective due to fabrication and/or material defects.
Also we reserve the right to replace the defective product by a successor product or repay the
original purchase price to the buyer in exchange to the defective product. Operating manuals and
possibly supplied software are excluded from the warranty.
b) Material and service charges shall be covered by us, but not shipping and handling costs involved
in transport from the buyer to the service station and/or to us.
c) Replaced parts become property of ELSA.
d) ELSA are authorized to carry out technical changes (e.g. firmware updates) beyond repair and
replacement of defective parts in order to bring the equipment up to the current technical state.
This does not result in any additional charge for the customer. A legal claim to this service does
not exist.
2 Warranty period
The warranty period for ELSA products is six years. Excepted from this warranty period are ELSA color
monitors and ELSA videoconferencing systems with a warranty period of 3 years. This period begins at
thedayofdeliveryfromtheELSAdealer. Warrantyservicesdo notresultinanextensionofthewarranty
period nor do they initiate a new warranty period. The warranty period for installed replacement parts
ends with the warranty period of the device as a whole.
3 Warranty procedure
a) If defects appear during the warranty period, the warranty claims must be made immediately, at
the latest within a period of 7 days.
b) Inthecaseofanyexternallyvisibledamagearisingfromtransport(e.g.damagetothehousing),the
transport company representative and ELSA should be informed immediately. On discovery of
damage which is not externally visible, the transport company and ELSA are to be immediately
informed in writing, at the latest within 7 days of delivery.
c) Transporttoandfromthelocationwherethewarrantyclaimisacceptedand/ortherepaireddevice
is exchanged, is at the purchaser's own risk and cost.
d) Warranty claims are only valid if the original purchase receipt is returned with the device.
4 Suspension of the warranty
All warranty claims will be deemed invalid
a) if the device is damaged or destroyed as a result of acts of nature or by environmental influences
(moisture, electric shock, dust, etc.),
b) if the device was stored or operated under conditions not in compliance with the technical
specifications,

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c) if the damage occurred due to incorrect handling, especially to non-observance of the system
description and the operating instructions,
d) if the device was opened, repaired or modified by persons not authorized by ELSA,
e) if the device shows any kind of mechanical damage,
f) ifinthecaseofanELSAMonitor,damagetothecathoderaytube(CRT)hasbeencausedespecially
by mechanical load (e.g. from shock to the pitch mask assembly or damage to the glass tube), by
strongmagnetic fieldsnear theCRT (colored dotsonthe screen),or throughthe permanent display
of an unchanging image (phosphor burnt),
g) if, and in as far as, the luminance of the TFT panel backlighting gradually decreases with time, or
h) if the warranty claim has not been reported in accordance with 3a) or 3b).
5 Operating mistakes
If it becomes apparent that the reported malfunction of the device has been caused by unsuitable
software, hardware, installation or operation, ELSA reserves the right to charge the purchaser for the
resulting testing costs.
6 Additional regulations
a) The above conditions define the complete scope of ELSA’s legal liability.
b) The warranty gives no entitlement to additional claims, such as any refund in full or in part.
Compensationclaims, regardlessofthe legalbasis, areexcluded. This does notapply if e.g.injury
to persons or damage to private property are specifically covered by the product liability law, or in
cases of intentional act or culpable negligence.
c) Claims for compensation of lost profits, indirect or consequential detriments, are excluded.
d) ELSA is not liable for lost data or retrieval of lost data in cases of slight and ordinary negligence.
e) InthecasethattheintentionalorculpablenegligenceofELSAemployeeshascausedalossofdata,
ELSAwillbeliableforthosecoststypicaltotherecoveryofdatawhereperiodicsecuritydataback-
ups have been made.
f) The warranty is valid only for the first purchaser and is not transferable.
g) ThecourtofjurisdictionislocatedinAachen,Germanyinthecasethatthepurchaserisamerchant.
If the purchaser does not have a court of jurisdiction in the Federal Republic of Germany or if he
moves his domicile out of Germany after conclusion of the contract, ELSA’s court of jurisdiction
applies. Thisisalsoapplicableif the purchaser'sdomicile is not knownat the time ofinstitution of
proceedings.
h) The law of the Federal Republic of Germany is applicable. The UN commercial law does not apply
to dealings between ELSA and the purchaser.