FCC ID: L52CT-DECT-H24 DECT Headset

CT-DECT Headset for Wireless Duplex Communication Operating Instructions Contents 1. Important safety instructions.....................................................................................................................3 2. Description .................................................................................................................................................5 2.1 General...................................................................................................................................................5 2.2 Power supply and operating time .........................................................................................................6 2.3 Audio signals used.................................................................................................................................6 2.4 Sidetone..................................................................................................................................................6 2.5 On/Off switch for the microphone .........................................................................................................6 3. On-air subscription.....................................................................................................................................6 3.1 General...................................................................................................................................................6 3.2 On-air subscription.................................................................................................................................7 3.2.1 On-air subscription of the first standard headset ............................................................................7 3.2.2 On-air subscription of the second standard headset ......................................................................7 4. Commissioning and operation.................................................................................................................7 4.1 Putting on the headset and adjusting the microphone .......................................................................7 4.2 Wearing the headset with an additional head strap............................................................................8 4.3 Switching on, synchronization, adjusting the speaker volume...........................................................8 4.4 Connection setup and release..............................................................................................................9 4.4.1 Connection setup and release by the standard headset................................................................9 4.4.2 Connection setup and release by the base headset.....................................................................10 4.5 End of operation...................................................................................................................................10 5. Headset with level-limited ambient sound reception ............................................................................10 5.1 General.................................................................................................................................................10 5.2 Operator control...................................................................................................................................11 6. Headset with radio set connection .........................................................................................................11 7. Headset muffs for helmet fastening .......................................................................................................12 8. Safekeeping storage ............................................................................................................................12 9. Recharging the batteries.........................................................................................................................13 10. Maintenance.........................................................................................................................................13 10.1 Visual inspection ..............................................................................................................................13 10.2 Cleaning............................................................................................................................................13 10.3 Replacing the windshield on the microphone ................................................................................14 10.4 Replacing the ear cushions.............................................................................................................14 11. Accessories and consumable parts ...................................................................................................14 2 Please note that any changes or modifications not expressly approved by the party responsible for compliance will void the users authority to operate the equipment. Important Note This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that cause undesired operation. SAFETY INFORMATION Your wireless headset transceiver contains a low power transmitter. When transmitting it sends out radio frequency (RF) signals. In August 1996, the Federal Communications Commission (FCC) adopted RF exposure guidelines with safety levels for wireless devices. WARNING This headset is considered to be a portable device which housing (the ear cushion) operates in contact with the user's body. Because of the construction of this headset the internal transmitter and it's antenna is located in such a way, that a separation distance from the user's body is maintained in compliance with the FCC's RF Exposure Guidelines. This device and it's antenna must not be co-located or operating in conjunction with any other antenna or transmitter. Use only the internal antenna. Unauthorized antennas, modifications, or attachments could damage the transmitter and may violate FCC regulations. 1. Important safety instructions When using CeoTronics products do not fail to comply with the following safety information:

l Before using CeoTronics products read completely the appropriate operating instructions. If in doubt, ask our technical staff. l If repair work of any kind needs to be done to CeoTronics products, arrange for it to be performed only by the company CeoTronics or by a specialized workshop that is authorized by CeoTronics. In all other cases our warranty and liability for the product shall lapse. l If products are operated on a mains voltage, always pull the mains plug out of the mains plug socket before opening such products (e.g. for servicing purposes) !

l Do not store CeoTronics products outside or in damp ambient conditions. At all times keep them clean, dry and at normal air humidity. CeoTronics products must not be stored in areas with a temperature of over +80 C (+176 F), e.g. in the summertime on the parcel shelf of a car. If not stated 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. l Do not immerse a CeoTronics product into water, if it is not expressly specified for this purpose. l When using CeoTronics products that are equipped with connection leads ensure that the latter do not get caught up in operational machinery or wheels !

l Type-tested muffs with a high degree of passive noise attenuation are used for CeoTronics headsets with headset muffs. If not stated otherwise, it is our experience that the passive noise attenuation of the headset muffs is reduced by approx. 3 dB due to the electronics that are integrated into the headset muffs. As a rule no empirical values are available for non-standard products. 3 At very high noise levels that exceed the passive protective effect of the headset muffs we recommend that ear plugs be worn as an additional measure. If in doubt, ask your safety officer or company doctor. Full noise attenuation exists only if the muff padding is in perfect condition. This should be replaced at the latest after every 6 months of use. l In the case of headsets with headset muffs that protect against harmful ambient noise and that are not equipped with additional electronics for level-limited ambient sound reception, take heed that the audibility of warning signals, warning calls etc. is also impaired !

l CeoTronics products that are not intrinsically safe (explosion-proof) and therefore have no special explosion-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 off explosions in such areas !

l If you are a cardiac pacemaker carrier, before operating a transmitter/receiver ask the manufacturer of your cardiac pacemaker for information about any impairment that might be caused due to high frequencies. l For safety reasons reception volumes in excess of 85 dB(A) are possible with a whole series of CeoTronics products. However, these can be regulated by the user. Do not set the volume any higher than is necessary. A very high volume setting can lead to damaged hearing, particularly if it is continuous. For high volumes or noise levels wear additional ear plugs. If in doubt, ask your safety officer or company doctor. l When on board an airplane always keep a transmitter/receiver switched off. Operation of the transmitter/receiver could affect the safety of the airplane and it is therefore prohibited. Never operate electronic devices on board an airplane without the express approval of an authorized member of the cabin crew. l Do not leave CeoTronics products lying around loose in cars, e.g. on the parcel shelf. Stow these products in a suitable, safe place in the car so that they do not present a danger to you or to other occupants of the car, if emergency braking is effected. l When driving a car, do not use the radio because it may distract you from the other traffic. Never use a CeoTronics product that will impair your hearing. l Transmit only when it is necessary. Unnecessarily occupying a channel can prevent the transmission of vitally important information. l Charge rechargeable batteries only with the appropriate suitable CeoTronics charger. Observe the voltage 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. l When handling rechargeable batteries comply with environmental protection regulations !

Rechargeable batteries contain toxic chemicals (e.g. cadmium). Never attempt to open a rechargeable 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 the household waste !

l Ensure that a short-circuit (risk of fire or injury) is not created across rechargeable battery terminals or charging sockets by a short-out (bent-open paper clip, bunch of keys etc.). In such an event the warranty shall lapse. Transport any spare rechargeable batteries in an electrically non-conducting package in order to avoid short-circuiting the rechargeable batteries. l Keep CeoTronics products and rechargeable batteries out of the reach of children and any other persons who are not familiar with the handling and operation thereof. l Packaging materials, e.g. filling materials and plastic bags are not toys and have to be kept out of the reach of children. There is a risk of children ingesting them and choking !

l Safe operation requires clean devices. Ensure that the devices (microphones, connectors etc.) are clean and in good condition at all times. l CeoTronics products may only be used for the specific application envisaged. l If the device is to be put out of operation definitively, bring it to a local recycling plant for disposal or send it to CeoTronics. 4 Description General 2. 2.1 The headset is a transmitter/receiver for wireless duplex voice and data communication between a max. of three communication parties over short distances. The range depends on the local circumstances. Up to two standard headsets can log into a base headset. Channel selection is effected automatically by the unit. The headset protects against harmful ambient noise and renders possible communication in noisy environments. The headset microphone is noise-compensating und is equipped with a flexible swan-

neck and windshield. The microphone can be switched on and off by means of a switch at the bottom of the right-hand headset muff. The minimum version of the system comprises a base headset and one standard headset. A second standard headset can also be operated in conjunction with the base headset. The base and standard headsets are marked by an imprint on the left headset muff, as follows:

CT-DECT Base CT-DECT Standard NOTE The base headset and the standard headset can also be used in conjunction with other CeoTronics DECT units. Please take heed of the special CeoTronics operating instructions for these DECT units. Fig. 1 Headset, basic version Key to Fig. 1 Headset, basic version a Adjustable head band b Left headset muff c On/Off switch and volume control d Button for subscription, connection setup and release e Ear cushions f Microphone and windshield g Flexible swanneck h On/Off switch for microphone i Right headset muff 5 Power supply and operating time 2.2 A 3.6 V/600 mAh rechargeable battery in the right headset muff provides the power supply for the headset. With a fully charged battery the operating time for continuous operation is approx. 6 hours. Audio signals used 2.3 Two different tones are used for signalling the operating statuses. The tone for the indication of positive responses (P-tone) has a higher frequency than the tone for the indication of negative responses (N-

tone). Signalling of the various events is effected by a varying number of consecutive P-tones or N-

tones. Positive acknowledgement tone All positive responses are indicated by a high P-tone. Negative acknowledgement tone and error tone All negative responses and error statuses are indicated by a low N-tone. Battery warning If the battery has an undervoltage a low 3-fold N-tone sequence N-N-N sounds approximately every 10 seconds in the headset. Range warning If the range limit is reached, a high 3-fold P-tone sequence P-P-P sounds approx. every 5 seconds in the headset. Sidetone 2.4 The sidetone while speaking is audible in headsets only after interconnection setup between the headsets (see sections 4.4...4.4.2). Due to this a control is always available as to whether a connection is active or not. On/Off switch for the microphone 2.5 The microphone can be switched on and off with the switch Mic.OFFMic. (Fig. 1/h) at the bottom of the right-hand headset muff. Three switch positions are possible. However, communication can only be performed after subscription (sections 3...3.2.2), switching on, synchronization, adjustment of the speaker volume (section 4.3) and connection setup (sections 4.4...4.4.2) have all been effected. Middle position OFF (receive): The headset microphone is switched off. You can only receive. Front switch position Mic. (transmit and receive): The headset microphone is switched on. You can speak into the microphone as long as you hold the switch in this position and simultaneously a message is being received. After releasing the switch the switch returns to the middle position OFF. Rear fixedswitch position Mic. (transmit and receive): The headset microphone is constantly switched on. You can speak into the microphone and simultaneously receive a message. On-air subscription General 3. 3.1 Each headset has its own identification number. First of all an allocation must always take place between the base headset and the maximum of two standard headsets. This subscription procedure, which has to be perfomed once only, is performed on the base headset and the maximum of two standard headsets manually by means of an operator control procedure. If a base headset or a standard headset is set to subscription mode and this is terminated after 2 minutes without the subscription procedure having been successfully concluded, the data bases of stored standard headsets available on the base headset and in the case of the standard headset the available data base for the stored base headset are deleted (Time Out). Once the subscription procedure has been successfully concluded, the identity of the calling party is stored in the data base of the headset. The standard headset stores a base headset. The base headset stores the last two successfully subscribed standard headsets, a repeat subscription being permitted. 6 If a third standard headset is subscribed into the base headset, the standard headset that was subscribed in next to last is deleted from the data base of the base headset. NOTE The base headset and the standard headset can also be used in conjunction with other CeoTronics DECT units. The on-air subscription of a headset to one of these DECT units is carried out analogous and in the sequence as described in sections 3.2....3.2.2. Going to do so, first ascertain which of the DECT units is the base unit (lettering CT-DECT Base) and which a standard unit (lettering CT-DECT Standard). For on-air subscription at a DECT unit always the on/off switch and the push-button )) for subscription, connection setup and release are used. Please take heed of the special CeoTronics operating instructions for the DECT unit. On-air subscription 3.2 NOTE Two standard headsets can never be simultaneously subscribed into the base headset, they must always be subscribed one after the other. For subscription the base headset must always be switched on before the standard headset. 3.2.1 On-air subscription of the first standard headset On the base headset press the push-button ) (Fig. 1/d) and switch on the base headset by means of the On/Off switch and volume control (rotary knob Fig. 1/c). After switching on keep the button ) pressed for at least 10 seconds. On the standard headset press the push-button ) (Fig. 1/d) and switch on the standard headset by means of the On/Off switch and volume control (rotary knob Fig. 1/c). After switching on keep the button ) pressed for at least 10 seconds. The standard headset has to be switched on within 2 minutes of the base headset being switched on, otherwise a Time Out may occur (see section 3.1). After approx. 30 seconds a high double-beep tone can be heard both in the base headset and in the standard headset. This indicates that the on-air subscription has been successfully completed. A second high double-beep tone finally reports that the standard headset has synchronized itself with the base headset. 3.2.2 On-air subscription of the second standard headset Switch off (position OFF) the base headset and, if it is switched on, the second standard headset by means of the On/Off switch and volume control (rotary knob Fig. 1/c). Repeat the subscription procedure as described in section 3.2.1 for the base headset and for the second standard headset. Commissioning and operation Putting on the headset and adjusting the microphone 4. 4.1 a. Put on the headset. Adjust the headset muffs by sliding the headband so that the muff padding fully encloses your ears and so that the headband is lying on the centre of your head. Only then is the best possible noise attenuation provided. For hygienic reasons we recommend that you use washable perspiration absorbers made of cotton for the headset. These are pulled over the muff padding, making them comfortable to wear. CAUTION Do not twist the flexible swanneck. Do not carry the headset by the swanneck. Use the microphone only with a windshield. 7 b. Adjust the flexible swanneck so that the microphone is located at a distance of approx. 5 mm

(0.2 in.) in front your lips. Optimum voice transmission with the best possible noise compensation is then provided. 4.2 Wearing the headset with an additional head strap In the event of fast body movements or extreme body postures or if you are using a protection helmet the headset can be fixed to your head additionally by means of the head strap provided (Fig. 2/a). a. Pull the headstrap as per Fig. 2 through the slit in the headset muffs and fasten it with the two retainers (Fig. 2/b). b. Put on the headset, fold the head band (Fig. 2/c) to the rear and wear the head band as a neck band. Ensure that the head strap and neck band are tautly seated. Fig. 2 Switching on, synchronization, adjusting the speaker volume 4.3 a. The rotary knob for switching the headset On/Off and for adjusting the speaker volume is located at the bottom of the left-hand headset muff. The headset is switched off in position OFF. Switch on the base headset and then the standard headset by means of the On/Off switch and volume control

(rotary knob). NOTE The push-button )) (Fig. 1/d) must not be pressed until the headsets are synchronized with each other. Synchronization: A click is audible in the base and in the standard headset roughly 10 seconds after switching on. The synchronization procedure then begins, i.e. the standard headset seeks its base headset. This synchronization procedure can last approx. 30 seconds. Upon completion of synchronization i.e. the standard headset has found its base headset a high double-beep tone sounds in the standard and in the base headset, indicating that the standard and the base headset are ready for operation. In the case of two standard headsets two high double-beep tones are audible in the base headset upon successful completion of synchronization. b. On voice reception adjust the speaker volume for your headset by means of the On/Off switch and volume control (rotary knob). NOTE Always leave the headsets switched on for the usage duration of the headsets so that immediate operating standby and availability of the headsets are provided. c. Connection setup and release see sections 4.4...4.4.2. 8 Connection setup and release 4.4 NOTE The base headset and the standard headset can also be used in conjunction with other CeoTronics DECT units. The connection setup and release for the units is carried out basically as described in sections 4.4.1, 4.4.2. Going to do so, first ascertain which of the DECT units is the base unit (lettering CT-DECT Base) and which a standard unit (lettering CT-DECT Standard). For the connection setup and release at a DECT unit always the push-button )) is used. Please take heed of the special CeoTronics operating instructions for the DECT unit. Prerequisites 4.4.1 Connection setup and release by the standard headset

(1)

Headsets subscribed (sections 3...3.2.2)

Headsets switched on and synchronized (section 4.3) Two-party conference

(2) Connection setup: Briefly press the push-button ) on the left-hand side of the headset muff of your standard headset. When the connection is set up a high beep tone sounds in the calling standard headset and in the called base headset. Subsequently duplex communication (speech and simultaneous listening) is possible for both parties. The microphone must be switched on in order to speak (see section 2.5). When the connection is active a sidetone is audible in the headset while speaking. This is for the purpose of control. Connection release: Briefly press the push-button ) on the left-hand side of the headset muff of your standard headset. The standard headset is disconnected from the base headset. To conclude a high beep tone then sounds in the standard headset and in the base headset. The standard headset and base headset are now on standby. Three-party conference

(3) Below the designations standard headset 1 and standard headset 2 are used only for the purpose of better differentiation in the operating instructions. Both the standard headsets operate with equal entitlement. Connection setup: Briefly press the push-button ) on the left-hand headset muff of your standard headset 1. Standard headset 1 sets up a connection with the active base headset. Upon setup of the connection a high beep tone sounds in standard headset 1 and in the called base headset. The base headset does not automatically set up a connection with standard headset 2. Not until the push-button ) has been pressed on standard headset 2 does standard headset 2 set up a connection with the base headset. If a connection exists between standard headset 1 and the base headset, the base headset then switches over automatically to three-party conference mode. If a connection already exists between standard headset 2 and the base headset when standard headset 1 sets up a connection with the base headset, the connection between standard headset 2 and the base headset is retained and the base headset switches over automatically to three-party conference mode. The microphone must be switched on in order to speak (see section 2.5). When the connection is active a sidetone is audible in the headset while speaking. This is for the purpose of control. Connection release: Briefly press the push-button ) on the left-hand headset muff of your standard headset 1. The standard headset 1 disconnects itself from the base headset. This procedure is acknowledged by a high beep tone in standard headset 1 and in the base headset. If a connection still exists at this time between the base headset and standard headset 2, the connection between the base headset and standard headset 2 is retained. Not until the push-button ) on standard headset 2 is pressed briefly does standard headset 2 disconnect itself from the base headset and the three headsets are on standby. 9 Prerequisites 4.4.2 Connection setup and release by the base headset

(1)

Headsets subscribed (sections 3...3.2.2)

Headsets switched on and synchronized (section 4.3) Two-party conference

(2) Connection setup: Briefly press the push-button ) on the left-hand side of the headset muff of your base headset. When the connection is set up a high beep tone sounds in the calling base headset and in the called standard headset. Subsequently duplex communication (speech and simultaneous listening) is possible for both parties. The microphone must be switched on in order to speak (see section 2.5). When the connection is active a sidetone is audible in the headset while speaking. This is for the purpose of control. Connection setup: Briefly press the push-button ) on the left-hand side of the headset muff of your base headset. The base headset disconnects itself from the standard headset. A high beep tone then sounds in the base headset and in the standard headset. The base headset and standard headset are now on standby. Three-party conference

(3) Below the designations standard handset 1 and standard headset 2 are used only for the purpose of better differentiation in the operating instructions. Both standard headsets operate with equal entitlement. Connection setup: Briefly press the push-button ) on the left-hand headset muff of your base headset. The base headset sets up automatically a connection with the active standard headsets 1 and 2. Upon setup of the connection a high beep tone sounds in the calling base headset and in the called standard headsets 1 and 2, and the base headset switches over automatically to three-party conference mode. The microphone must be switched on in order to speak (see section 2.5). When the connection is active a sidetone is audible in the headset while speaking. This is for the purpose of control. Connection release: Briefly press the push-button ) on the left-hand headset muff of your base headset. The base headset disconnects itself from the standard headsets 1 and 2. This procedure is acknowledged by a high beep tone in the base headset and in the standard headsets 1 and 2. The three headsets are now on standby. End of operation 4.5 Switch off the Headset with the ON/OFF switch and volume control knob (switch position OFF). This guarantees a longer usage from the rechargeable battery. If necessary recharge the headset battery. Headset with level-limited ambient sound reception General 5. 5.1 The headset with level-limited ambient sound reception (ASR) (Fig. 3) is used mainly where ambient sounds, warning signals etc, have to be heard perfectly alongside voice communication. With ASR, ambient sounds can be received via a second microphone (Fig. 3/a) on the front side of the right-hand headset muff and can be heard via one ASR speaker each in the right-hand and left-hand headset muffs. The hearing of voice communication is also effected via one speaker each in the right-

hand and left-hand headset muffs. Even when receiving a message the external sound reception is in operation. 10 Fig. 3 Headset with level-limited ambient sound reception In the case of external sound levels of over 85 dB(A) the sound level emitted by the ASR speakers in the headset muffs to the ear is limited to a maximum of 85 dB(A). The overall noise attenuation of the headset is, however, limited to passive noise attenuation of the headset muff. Operator control 5.2 Described below are only the operating control differences relating to external sound reception. Switch on the ambient sound reception by means of the rotary knob ASR (Fig. 3/b) on the rear side of the right-hand headset muff and adjust by means of this rotary knob the desired volume for the ambient sound reception. The ambient sound reception is switched off in position OFF. It is possible to use the headset for ambient sound reception only via the separate On/Off switch and volume control ASR. Fig. 4 6. Headset with radio set connection Two communication circuits are realizable with the additional radio set connection (example Fig. 4). Both the base headset and the standard headset can be equipped with a radio set connection. Connection to the radio set is effected via a radio set adapter which consists as a rule of the following parts:

Inline PTT button with fastening clip on the rear side (Fig. 4/b) Connection cable with socket for connection to the headset (Fig. 4/a) Connection cable with radio set plug (Fig. 4/c) depending on the radio set 11 Communication circuit 1 Communication between the user of the base headset and a max. of two other users of standard headsets within the headset frequency range. The standard headsets must have logged into the base headset. Communication circuit 2 Communication in connection with an additional radio set on the radio set channel. The radio set is connected to the headset via the radio set adapter. Commissioning and operation Described below are only the differences relating to the additional radio set connection. a. Insert the plug connection (Fig. 4/a). Connect the radio set adapter via the radio set plug (Fig. 4/c) to the accessory connection of the radio set. Fasten the inline PTT button (Fig. 4/b) by means of the clip on the rear side to a suitable place on your clothing. Switch on the radio set and adjust on the radio set the basic volume for the headset. Take heed of the operating instructions for the radio set issued by the radio set manufacturer. Switch on the headsets as per section 4.3, wait until the standard headset has synchronized itself with the base headset and adjust the desired speaker volume on the headsets. b. Voice communication circuit 1: See sections 4.4...4.4.2. c. Voice communication circuit 2: To transmit press the inline PTT button (Fig. 4/b), i.e. in order to key the radio set transmitter. You can speak into the headset microphone as long as you keep the key pressed. Upon releasing the key the radio set is back on standby/reception. A message that is received via the radio set is audible only in the right-hand headset muff of the headset which is connected to the radio set. When you press the inline PTT button and speak into the headset microphone, the message transmission path is dependent on the position of the microphone switch Mic.OFFMic.

(Fig. 1/h).

Microphone switch Mic.OFFMic. in middle position OFF: The message is transmitted to the radio set only

Microphone switch Mic.OFFMic. in key position Mic. or in the fixed switch position Mic.: The message is transmitted to the radio set and to the headset or to the two headsets with which an active connection setup exists. Headset muffs for helmet fastening 7. The two headset muffs can be supplied without a head band for lateral fastening to a helmet. Different fastening parts are available depending on the helmet type. Separate installation instructions are available for fastening to the helmet, these being provided together with the delivery of the fastening parts. Lay the connection cable between the two headset muffs in the helmet so that it causes no annoyance. In addition you can also use the head strap that is provided with each headset (see section 4.2). If no noise protection is required for the activity, you can fold the two fastening arms with the headset muffs outwards and away from the helmet. Safekeeping storage 8. Store the cleaned device in a clean, dry place at normal room temperature and in normal relative air humidity. 12 9. Recharging the batteries CAUTION Never use battery chargers to charge non-rechargeable batteries. Never open rechargeable batteries or throw them into fire. Used (defective) rechargeable batteries are subject to special waste disposal. Do not put them in the household refuse !

Fig. 5 Use a CeoTronics charger (see section 11) to charge the 3.6 V/600 mAh battery in the headset. Using other chargers can cause rechargeable batteries to become damaged. The charging time of a battery is dependent on the charger you are using. Separate CeoTronics operating instructions are available for this purpose. The battery charging socket (Fig. 5/b) is located on the right-hand headset muff and is sealed with a stopper (Fig. 5/a). Before connecting the charger pull the stopper out of the battery charging socket and re-insert it after recharging. WARNING To recharge the battery always switch off the headset (On/Off switch and volume control in position OFF). 10. Maintenance 10.1 Visual inspection Regularly examine the headset muffs and in particular the ear cushions for signs of fractures, cracks and wear. If the headset muffs are damaged, replace them and send them in to CeoTronics for repair. Replace damaged or worn ear cushions in accordance with section 10.4, and, even if not damaged, every 6 months of use at the latest. 10.2 Cleaning WARNING When cleaning ensure that no moisture penetrates inside the unit. 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 with a suitable clean cloth that has been slightly moistened with clear water, and rub the parts dry afterwards. If heavily soiled, some dishwashing liquid can be used in addition. 13 10.3 Replacing the windshield on the microphone Pull the windshield (Fig. 6/a) off the microphone and replace it. Fig. 6 10.4 Replacing the ear cushions Pull the ear cushion (Fig. 6/b) off the headset muff and replace it. Ensure that the new ear cushion fully engages. 11. Accessories and consumable parts Designation and description Carrying case for transceiver headset, colour grey Single-unit quick charger, charging time approx. 30 minutes For a mains voltage of 100...240 V AC and for operation on a car's 12 V DC electrical system For a mains voltage of 100...240 V AC and for operation on a car's 12 V DC electrical system (charger without main cord) Single-unit plug-in charger, charging time approx. 7 hours For a mains voltage of 230 V AC. Charger with Euro plug (CENELEC standard) For a mains voltage of 115 V AC mains. Charger with US plug (US standard) Ear cushion, 2 pcs. Windshield for microphone, 10 pcs. Comfort set consisting of 50 pcs. (25 pair-pack) sweat absorbing cotton pads Art. No. 40 35 030 09 10 100 09 10 110 40 06 525 40 06 530 50 00 501 50 02 201 40 10 025 14

CT-GateCom II.24 Full duplex communication system for aircraft push-back Description and Operation Contents 1. Important safety instructions ............................................................................................................. 2 2. Description ........................................................................................................................................ 5 2.1 General.......................................................................................................................................... 5 2.2 Communication circuits ................................................................................................................. 5 2.3 System overview ........................................................................................................................... 5 2.4 Communication Headsets ............................................................................................................. 5 2.5 Transmitter/Receiver Unit CT-GateCom II.24/Multi....................................................................... 9 2.6 Transmitter/Receiver Headset CT-GateCom II.24 ........................................................................ 9 2.7 Aircraft Interface CT-GateCom II.24+4........................................................................................ 10 2.8 Battery chargers .......................................................................................................................... 11 3. On-air subscription.......................................................................................................................... 12 3.1 General........................................................................................................................................ 12 3.2 On-air subscription of the first Transmitter/Receiver Unit of group 1........................................... 13 3.3 On-air subscription of the second Transmitter/Receiver Unit of group 1..................................... 13 3.4 On-air subscription of the first and second Transmitter/Receiver Unit of group 2 ....................... 13 4. Commissioning and operation......................................................................................................... 14 4.1 Aircaft Interface ........................................................................................................................... 14 4.2 Headsets and Transmitter/Receiver Units................................................................................... 14 4.3 Switching on, adjusting the speaker volume ............................................................................... 15 4.4 Connection setup and release by the Transmitter/Receiver Unit(s) ............................................ 15 4.5 End of operation .......................................................................................................................... 16 5. Safekeeping storage .................................................................................................................... 16 6. Recharging the batteries................................................................................................................. 16 7. Maintenance.................................................................................................................................... 17 7.1 Visual inspection.......................................................................................................................... 17 7.2 Cleaning ...................................................................................................................................... 17 7.3 Replacing the windshield on the headset microphone ................................................................ 17 7.4 Replacing the ear cushions of the headset muffs........................................................................ 17 8. Accessories and consumable parts ................................................................................................ 17 1. Important safety instructions When using CeoTronics products do not fail to comply with the following safety information:

Before using CeoTronics products read completely the appropriate operating instructions. If in doubt, ask our technical staff.

If repair work of any kind needs to be done to CeoTronics products, arrange for it to be performed only by the company CeoTronics or by a specialized workshop that is authorized by CeoTronics. In all other cases our warranty and liability for the product shall lapse.

If products are operated on a mains voltage, always pull the mains plug out of the mains plug socket before opening such products (e.g. for servicing purposes) !

Do not store CeoTronics products outside or in damp ambient conditions. At all times keep them clean, dry and at normal air humidity. CeoTronics products must not be stored in areas with a temperature of over +80 C (+176 F), e.g. in the summertime on the parcel shelf of a car. If not stated 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.

Do not immerse a CeoTronics product into water, if it is not expressly specified for this purpose.

When using CeoTronics products that are equipped with connection leads ensure that the latter do not get caught up in operational machinery or wheels !

Type-tested muffs with a high degree of passive noise attenuation are used for CeoTronics headsets with headset muffs. If not stated otherwise, it is our experience that the passive noise attenuation of the headset muffs is reduced by approx. 3 dB due to the electronics that are integrated into the headset muffs. As a rule no empirical values are available for non-standard products. At very high noise levels that exceed the passive protective effect of the headset muffs we recommend that ear plugs be worn as an additional measure. If in doubt, ask your safety officer or company doctor. Full noise attenuation exists only if the muff padding is in perfect condition. This should be replaced at the latest after every 6 months of use.

In the case of headsets with headset muffs that protect against harmful ambient noise and that are not equipped with additional electronics for level-limited ambient sound reception, take heed that the audibility of warning signals, warning calls etc. is also impaired !

CeoTronics products that are not intrinsically safe (explosion-proof) and therefore have no special explosion-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 off explosions in such areas !

Connect CeoTronics accessories to a device or disconnect them from a device only when the device is switched off.

If you are a cardiac pacemaker carrier, before operating a transmitter/receiver ask the manufacturer of your cardiac pacemaker for information about any impairment that might be caused due to high frequencies.

For safety reasons reception volumes in excess of 85 dB(A) are possible with a whole series of CeoTronics products. However, these can be regulated by the user. After switching on the communication system, set the reception volume to approx. 1/2 the available loudness volume and then test the audible volume. Do not set the volume any higher than is necessary. A very high volume setting can lead to damaged hearing, particularly if it is continuous. For high volumes or noise levels wear additional ear plugs. If in doubt, ask your safety officer or company doctor.

When on board an airplane always keep a transmitter/receiver switched off. Operation of the transmitter/receiver could affect the safety of the airplane and it is therefore prohibited. Never operate electronic devices on board an airplane without the express approval of an authorized member of the cabin crew.

Do not leave CeoTronics products lying around loose in cars, e.g. on the parcel shelf. Stow these products in a suitable, safe place in the car so that they do not present a danger to you or to other occupants of the car, if emergency braking is effected. 2

When driving a car, do not use the radio because it may distract you from the other traffic. Never use a CeoTronics product (headset, insert earphone, induction receiver etc.) that will impair your hearing.

Charge rechargeable batteries only with the appropriate suitable CeoTronics charger. Observe the voltage 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.

When handling rechargeable batteries comply with environmental protection regulations !

Rechargeable batteries contain toxic chemicals (e.g. cadmium). Never attempt to open a rechargeable 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 the household waste !

Ensure that a short-circuit (risk of fire or injury) is not created across rechargeable battery terminals or charging sockets by a short-out (bent-open paper clip, bunch of keys etc.). In such an event the warranty shall lapse. Transport any spare rechargeable batteries in an electrically non-conducting package in order to avoid short-circuiting the rechargeable batteries.

Keep CeoTronics products and rechargeable batteries out of the reach of children and any other persons who are not familiar with the handling and operation thereof.

Packaging materials, e.g. filling materials and plastic bags are not toys and have to be kept out of the reach of children. There is a risk of children ingesting them and choking !

Safe operation requires clean devices. Ensure that the devices (microphones, connectors etc.) are clean and in good condition at all times.

CeoTronics products may only be used for the specific application envisaged.

If the device is to be put out of operation definitively, bring it to a local recycling plant for disposal or send it to CeoTronics. Please note that any changes or modifications not expressly approved by the party responsible for compliance will void the users authority to operate the equipment. Important Note This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Declaration concerning RF Radiation Exposure:

The CT-DECT.24/CT-GateCom II.24 system is considered to be a portable transceiver. A portable device is defined to be used so that the radiating structure of the device is within 20 centimeters (7.9 in.) of the body of the user and no specific safety distance is needed. 3 Fig. 1 System overview 4 Description General 2. 2.1 This duplex communication system (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 one another. The tug driver is able to communicate with the flight deck via the Aircraft Interface that is connected to the aircraft intercom on the outside of the aircraft. Detailed information see section 2.2. The range depends on the local circumstances. Protection against eavesdropping is ensured by the digital design. Channel selection is effected automatically. Communication circuits 2.2 Wing walkers The two wing walkers can communicate with each other, with the marshalling agent, and with the tug driver. The wing walkers are not able to speak to the flight deck. But they are able to hear the communication between the flight deck and the tug driver. Marshalling agent The marshalling agent can communicate with the two wing walkers and with the tug driver. He is able to hear the communication between the flight deck and the tug driver. When the tug driver speaks to the flight deck the marshalling agent can also speak to the flight deck as long as the microphone switch at the left headset muff of the tug driver is in position PTT or HOT. Tug driver The tug driver can communicate with the two wing walkers, with the marshalling agent, and with the flight deck. When he communicates with the wing walkers and/or with the marshalling agent the flight deck doesnt hear this communication. When the tug driver communicates with the flight deck the two wing 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 deck The flight deck can only communicate with the tug driver. The two wing walkers and the marshalling agent can hear this communication as well. When the tug driver speaks to the flight deck the marshalling agent can also speak to the flight deck as long as the microphone switch at the left headset muff of the tug driver is in position PTT or HOT. System overview 2.3 The system (Fig. 1) consists of:

four GroundCom Headsets

four Transmitter/Receiver Units CT-GateCom II.24/Multi

one Aircraft Interface CT-GateCom II.24+4

one charging station for up to four removable Li-Ion rechargeable battery packs 3.6 V/2300 mAh

one single-unit charger for the Li-Ion rechargeable battery 3.6 V/2300 mAh in the Battery Pack of the Aircraft Interface CT-GateCom II.24+4 Communication Headsets 2.4 2.4.1 General The wing walkers, the marshalling agent and the tug driver use GroundCom Headsets in conjunction with Transmitter/Receiver Units CT-GateCom II.24/Multi. The GroundCom Headsets protect against harmful ambient noise and allow communication in noisy environments. The headset microphone is noise-compensating and is equipped with a flexible gooseneck and windshield. The microphone can be switched on and off by means of a switch at the headset muff. 5 2.4.2 Headset, basic version Fig. 2 Headset, basic version 2.4.3 Headset for tug driver Fig. 3 Headset for tug driver Key to Fig. 2 a Adjustable head band b Ear cushions c d Microphone and windshield e f Left headset muff Flexible gooseneck Option External PTT button with belt clip for communication between the wing walkers, the marshalling agent, and the tug driver g Connecting cable and plug for the Transmitter/Receiver Unit CT-GateCom II.24/Multi h Right headset muff i On/Off switch for microphone The 3-position microphone switch at the right headset muff allows communication between the wing walkers, the marshalling agent, and the tug driver but not with the flight deck. Information for the microphone switch see section 2.4.6 Key to Fig. 3 a Adjustable head band b Ear cushions c d On/Off switch for microphone Left headset muff The 3-position microphone switch at the left headset muff allows communication between the tug driver and the flight deck. Information for the microphone switch see section 2.4.6 e Microphone and windshield f g Option External PTT button with belt clip for Flexible gooseneck communication with the flight deck h Connecting cable and plug for the Transmitter/Receiver Unit CT-GateCom II.24/Multi Right headset muff On/Off switch for microphone The 3-position microphone switch at the right headset muff allows communication between the wing walkers, the marshalling agent, and the tug driver but not with the flight deck. Information for the microphone switch see section 2.4.6 i j 6 2.4.4 Headset with level-limited ambient sound reception Fig. 4 Headset with level-limited ambient sound reception General Headsets with level-limited ambient sound reception (Fig. 4) are used mainly where ambient sounds, warning signals etc. have to be heard alongside communication. The external sounds are received by a microphone (Fig. 4/b) on the front side of the left-hand headset muff and are audible inside this headset muff via the ambient sound speaker. If the external sounds exceed 85 dB(A), the sound level emitted to the ear by the ambient sound speaker is limited electronically to a maximum of 85 dB(A). The power for the ambient sound reception electronics is supplied by the Transmitter/Receiver Unit CT-

GateCom II.24/Multi. Switching On/Off and adjusting the volume for ambient sound reception The ambient sound reception is switched on and off and volume controlled by means of the additional combined On/Off switch and volume adjuster (Fig. 4/a) on the headset muff. 2.4.5 Audio signals used Two different audible tones are used for signaling the operating status via the headset connected to the Transmitter/Receiver Unit. The tone for the indication of positive responses (P-tone) has a higher frequency than the tone for the indication of negative responses (N-tone). Signaling of the various events is effected by a varying number of consecutive P-tones or N-tones. Positive acknowledgement tone All positive responses are indicated by a high P-tone. Negative acknowledgement tone and error tone All negative responses and error status are indicated by a low N-tone. Examples battery warning If the battery has an undervoltage a low 3-beep N-tone sequence N-N-N sounds approximately every 10 seconds in the Headset. Examples range warning If the range limit is reached, a high 3-beep P-tone sequence P-P-P sounds approx. every 5 seconds in the Headset. 2.4.6 On/Off switch for the microphone The microphone of the headset can be switched on and off with the microphone switch PTT.OFF HOT. at the bottom of the headset muff(s). Three switch positions are possible. However, communication can only be performed after on-air subscription (sections 3...3.4) that is carried out ex-

works, switching on, synchronization, adjustment of the speaker volume (sections 4...4.3) and connection setup (sections 4.4...4.4.2) have all been effected. Middle position OFF (receive): The headset microphone is switched off. You can only receive. Front switch position PTT (transmit and receive): PTT position (PTT = push-to-talk). The headset microphone is switched on. You can speak into the microphone as long as you hold the switch in this position and simultaneously a message is being received. After releasing the switch, the switch returns to the middle position OFF. Rear fixed switch position HOT (transmit and receive): Hot mic position. The headset microphone is constantly switched on. You can speak into the microphone and simultaneously receive a message. 7 2.4.7 Wearing the headset with an additional head strap In the event of rapid body movements or extreme body postures or if you are using a protective helmet the headset can be additionally secured on your head by means of the head strap (Fig. 5/a) provided. a. Pull the head strap as per Fig. 5 through the slit in the headset muffs and fasten it with the two retainers (Fig. 5/b). b. Put on the headset, fold the head band (Fig. 5/c) to the rear and wear the head band as a neck band. Ensure that the head strap and neck band are tautly seated. Fig. 5 8 Transmitter/Receiver Unit CT-GateCom II.24/Multi 2.5 Fig. 6 Transmitter/Receiver Unit CT-GateCom II.24/Multi The wing walkers, the marshalling agent and the tug driver have Transmitter/Receiver Units CT-GateCom II.24/Multi which are used in conjunction with the headsets. They are worn on waist belt by means of a fastening clip on the rear. The Transmitter/Receiver Unit is used for communication over short distances. The max. range depends on the local circumstances. Protection against eavesdropping is ensured by the digital design. Channel selection is effected automatically by the unit. Power for the Transmitter/Receiver Unit is supplied by a removable Li-Ion 3.6 V/2300 mAh rechargeable battery pack which resides in a battery compartment in the unit. Key to Fig. 6 a Jack for connection of the headset b On/off switch and volume control (rotary knob) c Bank of 5 push-buttons (red or black) Buttons 1 and 5 for on-air subscription Buttons 2, 3 and 4 for connection setup and connection release The tug driver and the marshalling agent have Transmitter/Receiver Units with red colored push-

button bank and the two wing walkers with black colored push-button bank. d Fastening clip on the rear to fasten the unit on waist belt e Removable cover for the battery compartment f Multi-purpose jack, e.g. for programming or for connection of accessories Transmitter/Receiver Headset CT-GateCom II.24 2.6 Fig. 7 Transmitter/Receiver Headset CT-GateCom II.24 Instead of a Transmitter/Receiver Unit CT-GateCom II.24/Multi (section 2.5) in conjunction with a communication headset

(sections 2.4...2.4.7), the Transmitter/Re-

ceiver Headset CT-GateCom II.24 (Fig. 7) can be used. Key to Fig. 7 a Adjustable head band b Left-hand headset muff c On/Off switch and volume control d Button for subscription, connection setup and release e Ear cushions f Microphone and windshield g Flexible gooseneck h On/Off switch for microphone i Right-hand headset muff 9 Fig. 8 Transmitter/Receiver Headset CT-GateCom II.24, microphone on/off switch (item a) On/Off switch for the microphone The microphone can be switched on and off with the switch Mic.OFFMic. (Fig. 8/a) at the bottom of the right-hand headset muff. Three switch positions are possible. Middle position OFF (receive): The headset microphone is switched off. You can only receive. Front switch position Mic. (transmit and receive):

The headset microphone is switched on. You can speak into the microphone as long as you hold the switch in this position and at the same time you can hear a received message. After releasing the switch the switch returns to the middle position OFF. Rear fixed switch position Mic. (transmit and receive): The headset microphone is constantly switched on. You can speak into the microphone and at the same time you can receive a message. Fig. 9 Transmitter/Receiver Headset CT-GateCom II.24, battery charging socket Power supply A 3.6 V/600 mAh NiCd rechargeable battery or an optional 3.6 V/2300 mAh Li-Ion rechargeable battery in the right headset muff provides the power supply for the headset. The battery charging socket (see example Fig. 9/a) is located on the rear of the right-

hand headset muff. Aircraft Interface CT-GateCom II.24+4 2.7 The Aircraft Interface (Fig. 10) consists of Interface (Fig. 10/j) and Battery Pack (Fig. 10/c) which reside in a carrying bag (Fig. 10/a). The carrying bag is closed by means of a zip. The unit is connected to the aircraft intercom via connecting cable and male jack-plug (Fig. 10/k). The Battery Pack contains a Li-Ion rechargeable battery 3.6 V/2300 mAh. It supplies the power for the Interface. The Battery Pack can be charged via the charging socket (Fig. 10/d). The weatherproof carrying bag is used to stow the Interface and the Battery Pack and can be attached to the aircraft, e.g. the access cover for the aircraft intercom, by means of the carrying strap or a hook.

NOTE

Keep the carrying bag closed when in use. 10 Fig. 10 CT-GateCom II.24+4/Aircraft Interface Key to Fig. 10 a Carrying bag for the Interface and the Battery b Stowage place for the coiled connecting cable Pack

(item k) c Battery Pack for the Interface. Equipped with a Li-Ion rechargeable battery 3.6 V/2300 mAh in the unit d Charging socket CHARGE for the Li-Ion rechargeable battery 3.6 V/2300 mAh in the Battery Pack e Green push-button ON to switch on the unit f Control lamp, lights up if the unit is switched on, flashes if the Battery Pack voltage is too low g Red push-button OFF to switch off the unit h Black subscription button W for the Transmitter/Receiver Units group 2 for wing walkers with black colored push-button bank i Red subscription button R for the Transmitter/Receiver Units group 1 for tug driver and marshalling agent with red colored push-button bank Interface j k Coiled connecting cable with male jack-plug for connection to the aircraft intercom Battery chargers 2.8 Two battery chargers are shipped with the system (see section 2.3). For recharging the batteries see section 6 and the special CeoTronics Operating Instructions for the chargers. 11 On-air subscription General 3. 3.1

NOTES

The 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 Unit CT-GateCom II.24 will be used in conjunction with the Aircraft Interface.

In the following the on-air subscription is described for the Aircraft Interface in conjunction with Transmitter/Receiver Units CT-GateCom II.24/Multi. The on-air subscription for the Aircraft Interface in conjunction with Transmitter/Receiver Headsets CT-GateCom II.24 is carried out analogous and in the sequence as described in sections 3.2...3.4. The subscription procedure is performed on the Aircraft Interface and the Transmitter/Receiver Units manually by means of a procedure carried out by the operator. The Aircraft Interface is equipped with two radio modules. The four Transmitter/Receiver Units are equipped 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 the Aircraft Interface. The Aircraft Interface is the base unit and the Transmitter/Receiver Units are subscribed to the Aircraft Interface. First of all an allocation must always take place between the Aircraft Interface and the Transmitter/Receiver Units. Ex-works the four Transmitter/Receiver Units are divided in two groups as follows

(Fig. 10/i and h):

Group 1 Transmitter/Receiver Units with red colored push-button bank for tug driver and marshalling agent. The subscription is carried out by means of the red subscription button T (Fig. 10/i) for group 1 at the Aircraft Interface

Group 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. 10/h) for group 2 at the Aircraft Interface Other allocations in pairs can be carried out later by the customer. Please heed that the subscription of the 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 Aircraft Interface, the Transmitter/Receiver Unit that was subscribed first is deleted from the data base of the Aircraft Interface. Once the subscription procedure has been successfully concluded, the identity of the communication partners is stored in the data base of the Aircraft Interface and of the Transmitter/Receiver Units. A Transmitter/Receiver Unit stores one Aircraft Interface, the Aircraft Interface stores in pairs up to four

(2 x 2) Transmitter/Receiver Units. If the Aircraft Interface or a Transmitter/Receiver Unit is set to subscription mode and this is terminated or not completed after 2 minutes without the subscription procedure having been successfully concluded a time out occurs. After a time out the subscription procedure must be restarted. 12 On-air subscription of the first Transmitter/Receiver Unit of group 1 3.2

NOTE

The Transmitter/Receiver Units are subscribed in pairs (group 1 and 2 see section 1), but one after the other, to the Aircraft Interface. First the two Transmitter/Receiver Units of group 1 are subscribed one after the other to the Aircraft Interface and then the two Transmitter/Receiver Units of group 2 are subscribed one after the other to the Aircraft Interface (see section 3.1).

Two Transmitter/Receiver Units can never be simultaneously subscribed to the Aircraft Interface. The Transmitter/Receiver Units must always be subscribed one after the other to complete a group.

For subscription the Aircraft Interface must always be switched on before the Transmitter/Receiver Unit. a. Connect the first headset of group 1 to the first Transmitter/Receiver Unit of group 1 (identifiable by the red colored push-button bank) via the connecting cable and plug of the headset. Open the carrying bag for the Aircraft Interface by means of the zip. b. At the Aircraft Interface press the red subscription push-button T (Fig. 10/i) for group 1, keep the red push-button T pressed and switch on the Aircraft Interface by means of the green push-button ON (Fig. 10/e). The control lamp (Fig. 10/f) illuminates. After switching on keep the red subscription push-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 the subscription button 1 simultaneous with subscription button 5 located at the begin and end of the push-button bank (Fig. 6/c). Keep the two push-buttons pressed and switch on the Transmitter/Receiver Unit by means of the On/Off switch and volume control (rotary knob Fig. 6/b). After switching on keep the two push-buttons pressed for at least 10 seconds. The subscription procedure on the Transmitter/Receiver Unit has to be started within 2 minutes after the subscription procedure on the Aircraft Interface was started, otherwise a Time Out may occur (see section 3.1). After approx. 30 seconds a high double-beep tone can be heard in the headset. This indicates that the on-air subscription has been successfully completed. A second high double-beep tone finally reports that the Transmitter/Receiver Unit has synchronized itself with the Aircraft Interface. On-air subscription of the second Transmitter/Receiver Unit of group 1 3.3 a. Switch off the Aircraft Interface with the red push-button OFF (Fig. 10/g). The control lamp (Fig. 10/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 the headset. Ensure that the Transmitter/Receiver Unit is switched off. The on/off switch and volume control (rotary knob Fig. 6/b) must be set to OFF . c. Repeat the subscription procedure for the Aircraft Interface and the second Transmitter/Receiver Unit of group 1 as described in section 3.2, steps b and c, for the Aircraft Interface and for the first Transmitter/Receiver Unit of group 1. 3.4 On-air subscription of the first and second Transmitter/Receiver Unit of group 2 The 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 3.2 and 3.3 for the two Transmitter/Receiver Units of group 1. At the Aircraft Interface the black subscription push-

button W (Fig. 10/h) for group 2 is used instead of the red push-button T for group 1 (Fig. 10/i). 13 Commissioning and operation 4.

NOTE In the following the commissioning and operation of the system is described for the Aircraft Interface and the Transmitter/Receiver Units CT-GateCom II.24/Multi which are used in conjunction with communication headsets. Aircaft Interface 4.1 The 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. 11/a) with male jack-plug (Fig. 11/c) out of the cover of the carrying bag. Lead the connecting cable with male jack-plug through one of the loops (Fig. 11/b) on the carrying bag. Close the carrying bag by means of the zip. This prevents any fluids running along the lead into the carrying bag. Fig. 11 c. At the aircraft locate the aircraft intercom connector. Hang the carrying bag e.g. over the access cover or to a suitable place near the aircraft intercom connector by means of the carrying strap or by means 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.

NOTE

Keep the carrying bag for the Aircraft Interface closed at all times while in use!

Headsets and Transmitter/Receiver Units 4.2 a. Connect the headset via the connecting cable and plug to its Transmitter/Receiver Unit. Fasten the Transmitter/Receiver Unit by means of the clip on the rear to a suitable place on your clothing. b. Put on the headset. Take care for a perfect comfortable fit. Only when the ear cushions are properly located around the ears the best noise attenuation of the ear muffs is provided. Adjust the height of each ear muff equally on both sides while holding the head band down until the ear cushions have a tight and comfortable fit. The head band should sit straight and comfortable on the top of the head. For hygiene reasons we recommend the use of the washable sweat absorbers on the ear muffs. These are pulled over the ear cushions and are for the purpose of wear comfort and hygiene. 14 CAUTION Do not twist the flexible gooseneck. Do not carry the headset by the gooseneck. Use the microphone only with a windshield. c. Adjust the flexible gooseneck by bending so that the microphone is located at a distance of approx. 5 mm (0.2 in.) in front your lips. Optimum voice transmission with the best possible noise compensation is then provided. Switching on, adjusting the speaker volume 4.3

NOTES

The Aircraft Interface must always be switched on before the Transmitter/Receiver Units.

On the Transmitter/Receiver Units the push-buttons 2,3,4 for connection setup and connection release, placed in the middle of the push-button bank (Fig. 6/c), must not be pressed until the Transmitter/Receiver Units are synchronized with the Aircraft Interface.

Always leave the Aircraft Interface and the Transmitter/Receiver Units switched on as long as you work with the communication system so that immediate availability of the system is provided. a. First switch on the Aircraft Interface by means of the green push-button ON (Fig. 10/e). The control lamp (Fig. 10/f) illuminates. If the Battery Pack voltage is too low the control lamp flashes and the Battery Pack must be charged. b. Switch on the Transmitter/Receiver Unit by means of the On/Off switch and volume control (rotary knob Fig. 6/b). After Switching on the connection synchronization between Transmitter/Receiver Unit and Aircraft Interface is effected automatically. Synchronization: A click is audible in the headset connected to the Transmitter/Receiver Unit approximately 10 seconds after switching on. The synchronization procedure then begins, i.e. the previously switched on Aircraft Interface seeks its Transmitter/Receiver Unit. This synchronization procedure can last approx. 30 seconds. Upon completion of synchronization i.e. the Aircraft Interface has found its Transmitter/Receiver Unit a high double-beep P-tone sounds in the headset, indicating that the Transmitter/Receiver Unit and the Aircraft Interface are ready for operation. c. At the Transmitter/Receiver Unit set the On/Off switch and volume control (rotary knob Fig. 6/b) to mid-position. Later, on voice reception, adjust the desired speaker volume for your headset. Do not set the volume any higher than necessary. d. Connection setup and release by the Transmitter/Receiver Units see sections 4.4...4.4.2. Connection setup and release by the Transmitter/Receiver Unit(s) 4.4 4.4.1 Prerequisites

Aircraft Interface and Transmitter/Receiver Unit(s) subscribed (sections 3...3.4)

Aircraft Interface and Transmitter/Receiver Unit(s) switched on and synchronized (section 4.3) 4.4.2 Connection setup and release Automatic connection setup after switching on After the Aircraft Interface and the Transmitter/Receiver Unit(s) are switched on the connection synchronization between the the Aircraft Interface and the Transmitter/Receiver Unit(s) is(are) effected automatically. Subsequently communication is possible. Connection release Briefly press one of the push-buttons for connection setup and release in the middle of the push-button bank (Fig. 6/c) at the Transmitter/Receiver Unit. The Transmitter/Receiver Unit is disconnected from the Aircraft Interface. This procedure is acknowledged by a high beep P-tone in the headset connected to the Transmitter/Receiver Unit. 15 Reconnection Briefly press one of the push-buttons for connection setup and release in the middle of the push-button bank (Fig. 6/c) at the Transmitter/Receiver Unit. In the headset connected to the Transmitter/Receiver Unit a high beep P-tone sounds when the connection is set up between the Transmitter/Receiver Unit and the Aircraft Interface. 4.5 End of operation 4.5.1 Aircraft Interface a. At the end of the workshift, switch off the Aircraft Interface before any of the Transmitter/Receiver Units. b. Recharge the rechargeable battery in the Battery Pack. 4.5.2 Transmitter/Receiver Units CT-GateCom II.24/Multi Switch off the Transmitter/Receiver Unit. Recharge the rechargeable battery. Safekeeping storage 4.5.3 Transmitter/Receiver Headsets CT-GateCom II.24 Switch off the headset. Recharge the rechargeable battery. 5. Store the cleaned devices in a clean, dry place at normal room temperature and in normal relative air humidity. 6. The rechargeable Li-Ion battery 3.6 V/2300 mAh in the Transmitter/Receiver Units and in the Battery Pack of the Aircraft Interface should only be charged with the chargers supplied with the system (see section 2.3). Otherwise the batteries may be damaged. The chargers are neither water-tight nor dust-

tight. Protect them against water, rain and dirt. They may only be used in rooms with normal relative air humidity and temperature. Do not cover up the ventilation slots of the chargers. Recharging the batteries CAUTION Never use battery chargers to charge non-rechargeable batteries. Never open rechargeable batteries or throw them into fire. Used (defective) rechargeable batteries are subject to special waste disposal. Do not put them in the household refuse. Observe your local regulations !

CAUTION Never 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 that does not contain dangerous concentrations of volatile vapors. Notice the special CeoTronics Operating Instructions for the chargers. To charge the battery pack in the Transmitter/Receiver Unit, switch off the Transmitter/Receiver Unit, remove the cover from the battery compartment and take out the battery pack as described on the battery pack sticker. Charge the battery pack with the charging station for Li-Ion rechargeable batteries. 16 Maintenance Visual inspection 7. 7.1 Regularly examine the devices, the headset muffs, the ear cushions, the cables and plug connectors for signs of fractures, cracks and wear. Send defective devices to CeoTronics for repair. Replace damaged or worn ear cushions in accordance with section 7.4, and, even if not damaged, every 6 months of use at the latest. 7.2 Cleaning CAUTION When 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 suitable clean cloth that has been slightly moistened with clear water, and rub the parts dry afterwards. If heavily soiled, some dishwashing liquid can be used in addition. 7.3 Replacing the windshield on the headset microphone Pull the windshield (Fig. 12/a) off the microphone and replace it. Fig. 12 7.4 Replacing the ear cushions of the headset muffs Pull the ear cushion (Fig. 12/b) off the headset muff and replace it. Ensure that the new ear cushion fully engages. Accessories and consumable parts 8. Designation and description Carrying case for headset, color grey Ear cushion, 2 pcs. Windshield for microphone, 10 pcs. Comfort set consisting of 50 pcs. (25 pair-pack) sweat absorbing cotton pads Art. No. 40 35 030 50 00 501 50 02 201 40 10 025 17 Germany and International Sales CeoTronics AG Adam-Opel-Str. 6 63322 Rdermark (Germany) Tel. +49-(0) 6074/87 51-0 Fax +49-(0) 6074/87 51-676 E-Mail verkauf@ceotronics.com USA/Canada/Mexico Great Britain and Ireland CeoTronics, Inc. Battlefield Lakes Tech Center II 533 Byron Street, Suite E Chesapeake, VA 23320-6603 Tel. (757) 549-6220 Fax (757) 549-6230 E-Mail sales@ceotronicsusa.com CeoTronics Ltd. 1 Highview High Street BORDON, Hampshire GU35 0AX Tel. 01420-47 93 53 Fax 01420-47 93 72 E-Mail ceotronics@winweb.com France Spain Switzerland CeoTronics Sarl Z.A. des Arpents 16, Rue du Pr aux Aulnes 77340 PONTAULT-COMBAULT Tlphone 01 60 18 33 00 Tlcopie 01 60 28 60 60 E-Mail ceotronics@worldonline.fr EIGENE/CT-GATECOMII/ZUL-USA.DOC/01/0901 DOK 0357 Copyright 9/2001 CeoTronics AG, 63322 Rdermark, Germany, Internet www.ceotronics.com CeoTronics S.L. C/Antonio Vicent 23-1 28019 Madrid Tel. 91-460 82 50/51 Fax 91-460 31 93 E-Mail ceotronics.gil@mad.canalpyme.com CeoTronics AG Grundstr. 16 6343 Rotkreuz Tel. 041/790 58 38 Fax 041/790 58 39 E-Mail ceotronics@tic.ch Subject to change