tower climber and working

aerial antenna architecture base blue bts cable cdma cell cellular climb climber climbing coax communicate communication construction danger dangerous electric electricity electronics equipment fall frequency gprs gsm hard harness hat height high industrial instalation job male manual many mast men microwave mobile modern object occupation person phone professional pylon radio safety satellite sky station street support tall tank technology telecom telecommunication telephone tower transceiver transmission transmit transmitter umts vender wave wcdma white wire wireless work worker