The radio base station includes a monitoring controller for determining whether to switch between BB cards; and a baseband signal processor for transmitting a suspension request to suspend the transmission of the user data when it is determined that the BB cards are switched, and performing the handover of a processing between the BB cards based on the transmission of the suspension request. These methods and apparatus include broadband and multi-band techniques for speech detection, estimation of near-end transmission path attenuation, and estimation of far-end transmission path attenuation and delay. Each test board includes a plurality of banks of electrically conductive receptacles, each one for resting a corresponding electronic device; each receptacle is adapted to receive a terminal of the corresponding electronic device. The WLAN module operates in response to the first clock reference. The packet is then routed to the output of the selected port.