1. Low-speed network

1.1 General principle

The low-speed network covers the collection, transport and distribution of information for telephone, SAI and public address/audio services.

The general principle adopted is based on the functions distributed among the equipment making up the TSS ground/ground transmission network, as shown in figure 1 .

A schematic diagram summarizing the functions described above is shown in figure 2 .

The proposed architecture for the distribution of information from these four networks adopts a point-to-point...