CeoTronics CT-DECT-I24 CT-DECT-Module User Manual CT GateCom UserMan

CeoTronics AG CT-DECT-Module CT GateCom UserMan

users manual

CT-GateCom II.24Full duplex communication system for aircraft push-backExampleUsers ManualContentsIntroduction............................................................................................................................................... 21. Important safety instructions ............................................................................................................. 22. Description ........................................................................................................................................ 52.1 General.......................................................................................................................................... 52.2 Communication circuits ................................................................................................................. 52.3 System overview ........................................................................................................................... 52.4 Aircraft Interface CT-GateCom II.24+4.......................................................................................... 52.8 Battery charger .............................................................................................................................. 73. Commissioning and operation........................................................................................................... 73.1 Aircaft Interface ............................................................................................................................. 73.2 Headsets and Transmitter/Receiver Units..................................................................................... 83.3 Switching on, adjusting the speaker volume ................................................................................. 83.4 Connection setup and release by the Transmitter/Receiver Unit(s) .............................................. 83.5 End of operation ............................................................................................................................ 94. Safekeeping – storage ...................................................................................................................... 95. Recharging the Battery Pack ............................................................................................................ 96. Maintenance...................................................................................................................................... 96.1 Visual inspections.......................................................................................................................... 96.2 Cleaning ........................................................................................................................................ 97. On-air subscription.......................................................................................................................... 107.1 General........................................................................................................................................ 107.2 On-air subscription of the first Transmitter/Receiver Unit of group 1........................................... 117.3 On-air subscription of the second Transmitter/Receiver Unit of group 1..................................... 117.4 On-air subscription of the first and second Transmitter/Receiver Unit of group 2 ....................... 11
2IntroductionThis user manual is an example and describes the CeoTrionics Aircraft Interface– that contains the Transceiver Module CT-DECT-I24 – in conjunction with 4 CeoTronicsTransmitter/Receiver Units CT-GateComII.24/Multi provided with CT GroundComHeadsets.Important NotePlease note that any changes or modifications not expressly approved by the partyresponsible for compliance will void the user’s authority to operate the equipment.This device complies with part 15 of the FCC Rules. Operation is subject to the following twoconditions: (1) This device may not cause harmful interference, and (2) this device mustaccept any interference received, including interference that cause undesired operation.Declaration concerning RF Radiation Exposure:The CT-GateCom II.24 contains the transceiver module CT-DECT-I24. The system isconsidered to be a mobile transceiver. The safety distance between the mobile device and anyhuman person must be 20 centimeters (7.9 in.).1. Important safety instructionsWhen using CeoTronics products do not fail to comply with the following safetyinformation:zBefore using CeoTronics products read completely the appropriate operating instructions. If in doubt,ask our technical staff.zIf repair work of any kind needs to be done to CeoTronics products, arrange for it to be performedonly by the company CeoTronics or by a specialized workshop that is authorized by CeoTronics. Inall other cases our warranty and liability for the product shall lapse.zIf products are operated on a mains voltage, always pull the mains plug out of the mains plug socketbefore opening such products (e.g. for servicing purposes) !zDo not store CeoTronics products outside or in damp ambient conditions. At all times keep themclean, dry and at normal air humidity. CeoTronics products must not be stored in areas with atemperature of over +80° C (+176° F), e.g. in the summertime on the parcel shelf of a car. If notstated otherwise, the following temperature ranges are allowed for CeoTronics products: -10 to+55° C (+14 to +131° F) for operation, -40 to +80° C (-40 to +176° F) for storage.
3zDo not immerse a CeoTronics product into water, if it is not expressly specified for this purpose.zWhen using CeoTronics products that are equipped with connection leads ensure that the latter donot get caught up in operational machinery or wheels !zCeoTronics products that are not intrinsically safe (explosion-proof) and therefore have no specialexplosion-proof designation must never be operated in potentially explosive environments (e.g.when refuelling cars, aircraft etc.). Devices that are not explosion-proof can unintentionally trigger offexplosions in such areas !zConnect CeoTronics accessories to a device or disconnect them from a device only when the deviceis switched off.zIf you are a cardiac pacemaker carrier, before operating a transmitter/receiver ask the manufacturerof your cardiac pacemaker for information about any impairment that might be caused due to highfrequencies.zWhen on board an airplane always keep a transmitter/receiver switched off. Operation of thetransmitter/receiver could affect the safety of the airplane and it is therefore prohibited. Neveroperate electronic devices on board an airplane without the express approval of an authorizedmember of the cabin crew.zDo not leave CeoTronics products lying around loose in cars, e.g. on the parcel shelf. Stow theseproducts in a suitable, safe place in the car so that they do not present a danger to you or to otheroccupants of the car, if emergency braking is effected.zCharge rechargeable batteries only with the appropriate suitable CeoTronics charger. Observe thevoltage and currency specifications, including those on the mains face (e.g. 230 V AC or 115 V AC).Never use the charger to recharge non-rechargeable batteries.zWhen handling rechargeable batteries comply with environmental protection regulations !Rechargeable batteries contain toxic chemicals (e.g. cadmium). Never attempt to open arechargeable battery and never throw a rechargeable battery into fire. Expended (defective)rechargeable batteries are subject to compulsory regulated waste disposal. Do not put them in thehousehold waste !zEnsure that a short-circuit (risk of fire or injury) is not created across rechargeable battery terminalsor charging sockets by a short-out (bent-open paper clip, bunch of keys etc.). In such an event thewarranty shall lapse. Transport any spare rechargeable batteries in an electrically non-conductingpackage in order to avoid short-circuiting the rechargeable batteries.zKeep CeoTronics products and rechargeable batteries out of the reach of children and any otherpersons who are not familiar with the handling and operation thereof.zPackaging materials, e.g. filling materials and plastic bags are not toys and have to be kept out ofthe reach of children. There is a risk of children ingesting them and choking !zSafe operation requires clean devices. Ensure that the devices are clean and in good condition at alltimes.zCeoTronics products may only be used for the specific application envisaged.zIf the device is to be put out of operation definitively, bring it to a local recycling plant for disposal orsend it to CeoTronics.
4Fig. 1 System overview (example)
52. Description2.1 GeneralThis duplex communication system (see example Fig. 1) is used for aircraft push-back. The tug driver,two wing walkers and marshalling agent wear headsets in conjunction with Transmitter/Receiver Units»CT-GateCom II.24/Multi«. The four headset wearers outside the aircraft can communicate with oneanother. The tug driver is able to communicate with the flight deck via the Aircraft Interface that isconnected to the aircraft intercom on the outside of the aircraft.The Aircraft Interface contains the Transceiver Module CT-DECT-I24.The range depends on the local circumstances. Protection against eavesdropping is ensured by thedigital design. Channel selection is effected automatically.2.2 Communication circuitsWing walkersThe two wing walkers can communicate with each other, with the marshalling agent, and with the tugdriver. The wing walkers are not able to speak to the flight deck. But they are able to hear thecommunication between the flight deck and the tug driver.Marshalling agentThe marshalling agent can communicate with the two wing walkers and with the tug driver. He is able tohear the communication between the flight deck and the tug driver. When the tug driver speakes to theflight deck the marshalling agent can also speak to the flight deck as long as the microphone switch atthe left headset muff of the tug driver is in position »PTT« or »HOT«.Tug driverThe tug driver can communicate with the two wing walkers, with the marshalling agent, and with theflight deck. When he communicates with the wing walkers and/or with the marshalling agent the flightdeck doesn‘t hear this communication. When the tug driver communicates with the flight deck the twowing walkers and the marshalling agent will hear this communication also.The tug driver is the only person who is able to control the communication with the flight deck.Flight deckThe flight deck can only communicate with the tug driver. The two wing walkers and the marshallingagent can hear this communication as well. When the tug driver speakes to the flight deck themarshalling agent can also speak to the flight deck as long as the microphone switch at the left headsetmuff of the tug driver is in position »PTT« or »HOT«.2.3 System overviewThe system (see example Fig. 1) consists of:yone Aircraft Interface CT-GateCom II.24+4 that contains the Transceiver Module CT-DECT-I24yone single-unit charger for the Li-Ion rechargeable battery 3.6 V/2300 mAh in the Battery Pack of theAircraft Interface CT-GateCom II.24+4yfour Transmitter/Receiver Units CT-GateCom II.24/Multi provided with four GroundCom Headsets2.4 Aircraft Interface CT-GateCom II.24+4The Aircraft Interface (Fig. 2) consists of Interface (Fig. 2/j) and Battery Pack (Fig. 2/c) which reside in acarrying bag (Fig. 2/a). The Transceiver Module CT-DECT-I24 is integrated in the Aircraft Interface.The carrying bag is closed by means of a zip. The unit is connected to the aircraft intercom viaconnecting cable and male jack-plug (Fig. 2/k).The Battery Pack contains a Li-Ion rechargeable battery 3.6 V/2300 mAh. It supplies the power for theInterface. The Battery Pack can be charged via the charging socket (Fig. 2/d).
6The weatherproof carrying bag is used to stow the Interface and the Battery Pack and can be attachedto the aircraft, e.g. the access cover for the aircraft intercom, by means of the carrying strap or a hook.Î NOTEzKeep the carrying bag closed when in use.Fig. 2 CT-GateCom II.24+4/Aircraft Interfacea Carrying bag for the Interface and the BatteryPackb Stowage place for the coiled connecting cable(item »k«)c Battery Pack for the Interface. Equipped with aLi-Ion rechargeable battery 3.6 V/2300 mAh inthe unitd Charging socket »CHARGE« for the Li-Ionrechargeable battery 3.6 V/2300 mAh in theBattery Packe Green push-button »ON« to switch on the unitf Control lamp, lights up if the unit is switched on,flashes if the Battery Pack voltage is too lowg Red push-button »OFF« to switch off the unith Black subscription button »W« for theTransmitter/Receiver Units group 2 for wingwalkers with black colored push-button banki Red subscription button »R« for theTransmitter/Receiver Units group 1 for tugdriver and marshalling agent with red coloredpush-button bankj Interfacek Coiled connecting cable with male jack-plug forconnection to the aircraft intercom
72.8 Battery chargerThe rechargeable Li-Ion battery 3.6 V/2300 mAh in the Battery Pack of the Aircraft Interface should onlybe charged with the charger supplied with the system (see section 2.3). For recharging the battey seesection 5 and the special CeoTronics users manual for the charger.3. Commissioning and operationÎ NOTEIn the following the commissioning and operation of the system is described for the AircraftInterface and the Transmitter/Receiver Units CT-GateCom II.24/Multi which are used inconjunction with communication headsets. The Aircraft Interface contains the TransceiverModule CT-DECT-I24.3.1 Aircaft InterfaceThe rechargeable battery in the Battery Pack must be fully charged.a. Open the carrying bag for the Aircraft Interface by means of the zip.b. Take the connecting cable (Fig. 3/a) with male jack-plug (Fig. 3/c) out of the cover of the carryingbag. Lead the connecting cable with male jack-plug through one of the loops (Fig. 3/b) on thecarrying bag. Close the carrying bag by means of the zip. This prevents any fluids running alongthe lead into the carrying bag.Fig. 3c. At the aircraft locate the aircraft intercom connector. Hang the carrying bag e.g. over the accesscover or to a suitable place near the aircraft intercom connector by means of the carrying strap or bymeans of a hook.Connect the Aircraft Interface via the connection cable and the male jack-plug to the female jack-plug for the aircraft intercom.Î NOTEKeep the carrying bag for the Aircraft Interface closed at all times while in use!
83.2 Headsets and Transmitter/Receiver UnitsConnect the headset via the connecting cable and plug to its Transmitter/Receiver Unit. Fasten theTransmitter/Receiver Unit by means of the clip on the rear to a suitable place on your clothing. Put onthe headset.3.3 Switching on, adjusting the speaker volumeÎ NOTESzThe Aircraft Interface must always be switched on before the Transmitter/Receiver Units.zOn the Transmitter/Receiver Units the push-buttons for connection setup and connectionrelease, placed in the middle of the push-button bank, must not be pressed until theTransmitter/Receiver Units are synchronized with the Aircraft Interface.zAlways leave the Aircraft Interface and the Transmitter/Receiver Units switched on as long asyou work with the communication system so that immediate availability of the system isprovided.a. First switch on the Aircraft Interface by means of the green push-button ON (Fig. 2/e). The controllamp (Fig. 2/f) illuminates. If the Battery Pack voltage is too low the control lamp flashes and theBattery Pack must be charged.b. Switch on the Transmitter/Receiver Unit by means of the On/Off switch and volume control (rotaryknob).After Switching on the connection synchronization between Transmitter/Receiver Unit and AircraftInterface is effected automatically.Synchronization: A click is audible in the headset connected to the Transmitter/Receiver Unitapproximately 10 seconds after switching on. The synchronization procedure then begins, i.e. thepreviously switched on Aircraft Interface seeks its Transmitter/Receiver Unit. This synchronizationprocedure can last approx. 30 seconds. Upon completion of synchronization – i.e. the AircraftInterface has found its Transmitter/Receiver Unit – a high double-beep P-tone sounds in theheadset, indicating that the Transmitter/Receiver Unit and the Aircraft Interface are ready foroperation.c. At the Transmitter/Receiver Unit set the On/Off switch and volume control (rotary knob) to mid-position. Later, on voice reception, adjust the desired speaker volume for your headset. Do not setthe volume any higher than necessary.d. Connection setup and release by the Transmitter/Receiver Units see sections 3.4...3.4.2.3.4 Connection setup and release by the Transmitter/Receiver Unit(s)3.4.1 PrerequisitesyAircraft Interface and Transmitter/Receiver Unit(s) subscribed (sections 7...7.4)yAircraft Interface and Transmitter/Receiver Unit(s) switched on and synchronized (section 3.3)3.4.2 Connection setup and releaseAutomatic connection setup after switching onAfter the Aircraft Interface and the Transmitter/Receiver Unit(s) are switched on the connectionsynchronization between the the Aircraft Interface and the Transmitter/Receiver Unit(s) is(are) effectedautomatically. Subsequently communication is possible.Connection releaseBriefly press one of the push-buttons for connection setup and release in the middle of the push-buttonbank at the Transmitter/Receiver Unit. The Transmitter/Receiver Unit is disconnected from the AircraftInterface. This procedure is acknowleded by a high beep P-tone in the headset connected to theTransmitter/Receiver Unit.
9ReconnectionBriefly press one of the push-buttons for connection setup and release in the middle of the push-buttonbank at the Transmitter/Receiver Unit. In the headset connected to the Transmitter/Receiver Unit a highbeep P-tone sounds when the connection is set up between the Transmitter/Reciever Unit and theAircraft Interface.3.5 End of operationAt the end of the workshift, switch off the Aircraft Interface before any of the Transmitter/Receiver Units.Recharge the rechargeable battery in the Battery Pack.4. Safekeeping – storageStore the cleaned devices in a clean, dry place at normal room temperature and in normal relative airhumidity.5. Recharging the Battery PackThe rechargeable Li-Ion battery 3.6 V/2300 mAh in the Battery Pack of the Aircraft Interface should onlybe charged with the charger supplied with the system (see section 2.3). Otherwise the battery may bedamaged. The charger is neither water-tight nor dust-tight. Protect it against water, rain and dirt. Thecharger may only be used in rooms with normal relative air humidity and temperature. Do not cover upthe ventilation slots of the charger.CAUTIONNever use battery chargers to charge non-rechargeable batteries. Never open rechargeablebatteries or throw them into fire. Used (defective) rechargeable batteries are subject to specialwaste disposal. Do not put them in the household refuse. Observe your local regulations !CAUTIONNever charge a rechargeable battery in areas with an explosion risk – an explosion may result.Charge and change rechargeable batteries only within a building or similar environment thatdoes not contain dangerous concentrations of volatile vapors.Notice the special CeoTronics users manual for the charger.To charge the battery pack, switch off the unit by means of the red push-button OFF (Fig. 2/g).6. Maintenance6.1 Visual inspectionsRegularly examine the device, the cables and plug connectors for signs of fractures, cracks and wear.Send a defective device to CeoTronics for repair.6.2 CleaningCAUTIONWhen cleaning ensure that no moisture penetrates inside the devices. Do not use any solvents(e.g. benzine, alcohol, etc.) for cleaning purposes !Remove any loose dust with a soft brush. Clean, if necessary, the outside of the devices with a suitableclean cloth that has been slightly moistened with clear water, and rub the parts dry afterwards. If heavilysoiled, some dishwashing liquid can be used in addition. Clean connectors with a commonly availablecontact cleaning agent.
107. On-air subscription7.1 GeneralÎ NOTESzThe on-air subscription is a procedure which has to be performed once only ex-works.It must be performed again only in the case of an error or if another Transmitter/Receiver UnitCT-GateCom II.24 will be used in conjunction with the Aircraft Interface. The Aircraft Interfacecontains the Transceiver Module CT-DECT-I24.zIn the following the on-air subscription is described for the Aircraft Interface in conjunctionwith Transmitter/Receiver Units CT-GateCom II.24/Multi. The on-air subscription for theAircraft Interface in conjunction with Transmitter/Receiver Headsets CT-GateCom II.24 iscarried out analogous and in the sequence as described in sections 7.2...7.4.The subscription procedure is performed on the Aircraft Interface and the Transmitter/Receiver Unitsmanually by means of a procedure carried out by the operator.The Aircraft Interface is equipped with two radio modules. The four Transmitter/Receiver Units areequipped with one radio module each. Each unit (radio module) has its own identification number.A max. of four Transmitter/Receiver Units (in two groups) is allocated to the two radio modules in theAircraft Interface. The Aircraft Interface is the base unit and the Transmitter/Receiver Units aresubscribed to the Aircraft Interface. First of all an allocation must always take place between the AircraftInterface and the Transmitter/Receiver Units.Ex-works the four Transmitter/Receiver Units are divided in two groups as follows(Fig. 2/i and h):yGroup 1 – Transmitter/Receiver Units with red colored push-button bank for tug driver andmarshalling agent. The subscription is carried out by means of the red subscription button»T« (Fig. 2/i) for group 1 at the Aircraft InterfaceyGroup 2 – Transmitter/Receiver Units with black colored push-button bank for wing walkers.The subscription is carried out by means of the black subscription button »W« (Fig. 2/h) forgroup 2 at the Aircraft InterfaceOther allocations in pairs can be carried out later by the customer. Please heed that the subscription ofthe Transmitter/Receiver Units in conjunction with the Aircraft Interface is always carried out in pairs.If a third Transmitter/Receiver Unit is subscribed to one of the two groups of the the Aircraft Interface,the Transmitter/Receiver Unit that was subscribed first is deleted from the data base of the AircraftInterface.Once the subscription procedure has been successfully concluded, the identity of the communicationpartners is stored in the data base of the Aircraft Interface and of the Transmitter/Receiver Units. ATransmitter/Receiver Unit stores one Aircraft Interface, the Aircraft Interface stores in pairs up to four(2 x 2) Transmitter/Receiver Units.Time OutIf the Aircraft Interface or a Transmitter/Receiver Unit is set to subscription mode and this is terminatedor not completed after 2 minutes without the subscription procedure having been successfullyconcluded a »Time Out« occurs. The »Time Out« effects that in the Aircraft Interface the available databases for a max. of two stored Transmitter/Receiver Units of a group and in the case of theTransmitter/Receiver Unit the available data base for the stored Aircraft Interface are deleted. After a»Time Out« the subscription procedure for the Aircraft Interface and for both Transmitter/Receiver Unitsmust be restarted.
117.2 On-air subscription of the first Transmitter/Receiver Unit of group 1Î NOTEzThe Transmitter/Receiver Units are subscribed in pairs (group 1 and 2 see section 1), but oneafter the other, to the Aircraft Interface. First the two Transmitter/Receiver Units of group 1are subscribed one after the other to the Aircraft Interface and then the twoTransmitter/Receiver Units of group 2 are subscribed one after the other to the AircraftInterface.zTwo Transmitter/Receiver Units can never be simultaneously subscribed to the AircraftInterface. The Transmitter/Receiver Units must always be subscribed one after the other tocomplete a group.zFor subscription the Aircraft Interface must always be switched on before theTransmitter/Receiver Unit.a. Connect the first headset of group 1 to the first Transmitter/Receiver Unit of group 1 (identifiable bythe red colored push-button bank) via the connecting cable and plug of the headset. Open thecarrying bag for the Aircraft Interface by means of the zip.b. At the Aircraft Interface press the red subscription push-button »T« (Fig. 2/i) for group 1, keep thered push-button »T« pressed and switch on the Aircraft Interface by means of the green push-buttonON (Fig. 2/e). The control lamp (Fig. 2/f) illuminates. After switching on keep the red subscriptionpush-button »T« pressed for at least 10 seconds. Than immediately carry out step »c«.c. At the first Transmitter/Receiver Unit group 1 with red colored push-button bank press thesubscription button 1 simultaneous with subscription button 5 located at the begin and end of thepush-button bank. Keep the two push-buttons pressed and switch on the Transmitter/Receiver Unitby means of the On/Off switch and volume control (rotary knob). After switching on keep the twopush-buttons pressed for at least 10 seconds.The subscription procedure on the Transmitter/Receiver Unit has to be started within 2minutes after the subscription procedure on the Aircraft Interface was started, otherwise a»Time Out« may occur (see section 7.1).After approx. 30 seconds a high double-beep tone can be heard in the headset. This indicates thatthe on-air subscription has been successfully completed. A second high double-beep tone finallyreports that the Transmitter/Receiver Unit has synchronized itself with the Aircraft Interface.7.3 On-air subscription of the second Transmitter/Receiver Unit of group 1a. Switch off the Aircraft Interface with the red push-button OFF (Fig. 2/g). The control lamp (Fig. 2/f)extinguishes.b. Connect the second headset of group 1 to the second Transmitter/Receiver Unit of group 1(identifiable by the red colored push-button bank) by means of the connecting cable and plug of theheadset. Ensure that the Transmitter/Receiver Unit is switched off. The on/off switch and volumecontrol (rotary knob) must be set to OFF .c. Repeat the subscription procedure for the Aircraft Interface and the second Transmitter/ReceiverUnit of group 1 as described in section 7.2, steps »b« and »c«, for the Aircraft Interface and for thefirst Transmitter/Receiver Unit of group 1.7.4 On-air subscription of the first and second Transmitter/Receiver Unit of group 2The subscription procedure for the Aircraft Interface and the two Transmitter/receiver Units of group 2(identifiable by the black colored push-button bank) is carried out as described in sections 7.2 and 7.3for the two Transmitter/Receiver Units of group 1. At the Aircraft Interface the black subscription push-button »W« (Fig. 2/h) for group 2 is used instead of the red push-button »T« for group 1 (Fig. 2/i).
Germany andInternational SalesCeoTronics AGAdam-Opel-Str. 663322 Rödermark (Germany)Tel. +49-(0) 6074/87 51-0Fax +49-(0) 6074/87 51-676E-Mail verkauf@ceotronics.comUSA/Canada/MexicoCeoTronics, Inc.533 Byron Street, Suite EChesapeake, VA 23320-6603Tel. (757) 549-6220Fax (757) 549-6230E-Mail sales@ceotronicsusa.comGreat Britain and IrelandCeoTronics Ltd.1 Highview y High StreetBORDON, HampshireGU35 0AXTel. 01420-47 93 53Fax 01420-47 93 72E-Mail ceotronics@winweb.comFranceCeoTronics SarlZ.A. des Arpents16, Rue du Pré aux Aulnes77340 PONTAULT-COMBAULTTéléphone 01 60 18 33 00Télécopie 01 60 28 60 60E-Mail ceotronics@worldonline.frSpainCeoTronics S.L.C/Antonio Vicent 23-1°28019 MadridTel. 91-460 82 50/51Fax 91-460 31 93E-Mailceotronics.gil@mad.canalpyme.comSwitzerlandCeoTronics AGGrundstr. 166343 RotkreuzTel. 041/790 58 38Fax 041/790 58 39E-Mail ceotronics@tic.chEIGENE/CT-GATECOMII/ZUL-USA-2.DOC/02/0102 y DOK 0357 Subject to changeCopyright © 1/2002 CeoTronics AG, 63322 Rödermark, Germany, Internet www.ceotronics.com
Federal Communications CommissionAuthorization and Evaluation DivisionEquipment Authorization Branch7435 Oakland Mills RoadColumbia, MD 21046January 31, 2002Applicant’s declaration concerning RF Radiation ExposureWe hereby indicate that the product CT-DECT-I24is considered to be a mobile transceiver.A safety distance of 20 centimeter (7.9 inch) between the Dect-module and humanperson must be ensured.The output power is maximum +20.6 dBm.This device and its antenna must not be co-located or operating in conjunction with anyother antenna or transmitter.A safety statement will be integrated in the user’s manual to provide end-users withtransmitter operating instructions for satisfying RF exposure compliance.CeoTronics AGAdam Opel Strasse 6D- 63322 RödermarkGermanyRödermark, January 31, 2002Berthold HemerMember of board R & D

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