While implementing a non-carrier-grade wireless backhaul, a technician notices the current channel selection is externally polluted with various RF signals. Upon performing a spectral anaIysis, the technician discovers a channel containing almost no RF pollution. Unfortunately, the technician is unable to select that channel. Which of the following is the MOST likely reason for this issue?
发布于 2021-03-18 18:36:55
【单选题】 A The channel is reserved for licensed band use B The channel selection is defective, contact the manufacturer C The channel must be unblocked by the vendor. D The device requires a firmware update to unlock the channel.
