(Telecompaper) Vodafone Spain and Huawei have announced the successful completion of the first over-the-air connection on a live network using standardised NB-IoT (narrowband Internet of Things). The trial was held in Madrid on 19 September, with engineers using a live 4G base station supporting NB-IoT technology to make the connection via the 800 MHz licensed spectrum frequency band. In a statement the companies described the test as the last important milestone before the commercial launch of NB-IoT in 2017.