Drilling apparatus having a drillstring and operable to rotate the drillstring and operable to provide vibration axially to the drill head. Each of the N coaxial cables is configured to receive an amplified radio frequency signal from a respective one of the N radio frequency power amplifiers. Information is then retrieved from a database in accordance with the decision logic. On completion of the subscriber services requiring the increased bandwidth, the bandwidth management system can reallocate bandwidth in accordance with the requirements determined from information provided by the service provider and the plurality of subscriber devices. The particular rate is deemed as being supported by the multipath channel if the metric is greater than or equal to the threshold SNR.