Filtro Oy is a provider of products and services such as television test card generators,telephone cable gas pressure monitoring systems,measuring instruments, crosstalk,measuring instruments, noise transmission, telecommunications systems,electrical test equipment, telephone cable,electrical test equipment, telephone transmission equipment,electrical test equipment, sound receiver, for telephones,test equipment for telephone exchanges,electrical test equipment, telegraph relay,oscillators and field meters for television aerial installations,analysers for telegraph and telephone line traffic,dummy loads, measuring and testing,electrical test equipment for television sets and television systems,test benches for telecommunications,test equipment for push-button telephones,test and fault detection equipment for mobile telephones (cellular phones),radio frequency (rf) measuring equipment,pulse meters, recording, for telephony,tracing instruments, individual wires in telecommunication cables,cable fault locators, telecommunications,testing equipment for asymmetrical digital subscriber lines (adsl),time domain reflectometers (tdrs),testing and measuring laboratories, mobile, for telecommunications.