CeoTronics CT-DECT-H24, CT-DECT-M24 Users Manual
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:
z Before using CeoTronics products read completely the appropriate operating instructions. If in doubt,
ask our technical staff.
z 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.
z 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) !
z 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.
z Do not immerse a CeoTronics product into water, if it is not expressly specified for this purpose.
z When using CeoTronics products that are equipped with connection leads ensure that the latter do
not get caught up in operational machinery or wheels !
z 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.
z 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 !
z 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 !
z Connect CeoTronics accessories to a device or disconnect them from a device only when the device
is switched off.
z 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.
z 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.
z 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.
z 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.
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z 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.
z 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.
z 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 !
z 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.
z 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.
z 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 !
z Safe operation requires clean devices. Ensure that the devices (microphones, connectors etc.) are
clean and in good condition at all times.
z CeoTronics products may only be used for the specific application envisaged.
z 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.
Important Note
Please note that any changes or modifications not expressly approved by the party
responsible 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 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.
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Fig. 1 System overview
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2. Description
2.1 General
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 »CTGateCom 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.
2.2 Communication circuits
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 doesn‘t 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«.
2.3 System overview
The system (Fig. 1) consists of:
y four GroundCom Headsets
y four Transmitter/Receiver Units CT-GateCom II.24/Multi
y one Aircraft Interface CT-GateCom II.24+4
y one charging station for up to four removable Li-Ion rechargeable battery packs 3.6 V/2300 mAh
y 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
2.4 Communication Headsets
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.
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2.4.2 Headset, basic version
Fig. 2 Headset, basic version
Key to Fig. 2
a Adjustable head band
b Ear cushions
c Left headset muff
d Microphone and windshield
e Flexible gooseneck
f 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
2.4.3 Headset for tug driver
Fig. 3 Headset for tug driver
Key to Fig. 3
a Adjustable head band
b Ear cushions
c Left headset muff
d On/Off switch for microphone
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 Flexible gooseneck
g Option – External PTT button with belt clip for
communication with the flight deck
h Connecting cable and plug for the
Transmitter/Receiver Unit
CT-GateCom II.24/Multi
i Right headset muff
j 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
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