Complex sentence: The network uses OpenBTS, Asterisk, and an Ettus Research Universal Software Radio Peripheral to provide voice and SMS service to connected devices, but during DEF CON 20 it did not have data ability.
Split into simpler sentences: The network uses OpenBTS, Asterisk, and an Ettus Research Universal Software Radio Peripheral to provide voice and SMS service to connected devices. During DEF CON 20 it did not have data ability.