adventure parks in ahus other outdoor activities in ahus nature & parks in ahus beaches in ahus nature & wildlife areas in ahus tours in ahus sightseeing tours in ahus adrenaline & extreme tours in ahus city tours in ahus historical & heritage tours in ahus film & tv tours in ahus zipline & aerial adventure...
open-wire line, with several conductors attached to porcelain insulators on cross-arms on "telegraph" poles. hence party line service was often given to residential customers to minimise the number of local loops required. usually all these circuits went into aerial or buried cables with a twisted pair...