Radio Relay Stations and Infrastructure

The trunk networks may use fixed radio links as well as underground or above ground cables. These radio links require the provision of radio relay stations. A station usually consists of a small building to accommodate the radio equipment and a tower normally of up to 60 metres in height supporting a number of antennas. Antennas can also be located on buildings or other structures. Fixed radio link antennas are round 'dishes', with typical diameters of 0.3, 0.6 and 1.2 metres, although reflectors may be of other shapes and sizes.