aerial amplifier black dish house metal receiver satellite shadow sky space television tv wall white wire box boxes communication correspondence letter Letterbox lock lock box lockbox mail mailbox post Postman receive write angles cables communicating communications communications-equipment concave connecting distant distinctive electrical-signals electromagnetic equipment exterior external height high light mobile-phones modern parabolic parabolic-reflector radio-waves receivers receiving round satellite-dish satellite-dishes sending Signals steel steel-structure technical technology telecommunications telephones tower towering transmission transmissions transmitters transmitting wires wiring air-conditioners air-conditioning building cambodia clouds colorful coloring colors colourful colouring colours culture feedhorn highrise mauve multi-storey multi-story purple roof rooftop Australia Australian brown bush central central-Australia contrast contrasting descriptive distance drought dry dry-brown-land far hills hilly mountain mountain-range outback outcrops rocky rough scrub slope sloping steel structure antenna cloud dishes engineering pole antique call communicate dial dialing listen mouth mouthpiece numbers phone reproduction speak talk telephone blue cautiously cripple cross delicate disabled person female glass gray green invalid male mark red symbol token delivers delivery Envelope letters lick office paper postal posting seal sealed send stationery base basestation cell cells cellular grid radiate radiation radio repeater station stations transmitter close-up handset hear key macro numeric pad ring sound voice