User's Manual

7. On-air subscription

7.1 General

Î 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. The Aircraft Interface

contains the Transceiver Module CT-DECT-I24.

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 7.2...7.4.

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. 2/i and h):

y 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. 2/i) for group 1 at the Aircraft Interface

y 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. 2/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 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.

Time Out

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. The »Time Out« effects that in the Aircraft Interface the available data

bases for a max. of two stored Transmitter/Receiver Units of a group and in the case of the

Transmitter/Receiver Unit the available data base for the stored Aircraft Interface are deleted. After a

»Time Out« the subscription procedure for the Aircraft Interface and for both Transmitter/Receiver Units

must be restarted.