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When the law to create FirstNet was passed, 20 MHz of 700-MHz spectrum including 10 MHz previously known as the D-Block public-safety spectrum had been licensed to the Public Safety Spectrum Trust (PSST). Two adjacent segments of spectrum were combined to provide 20 MHz dedicated to what is now the National Public Safety Broadband Network (NPSBN) and/or Band 14. This 20 MHz of spectrum is divided into two segments with 10 MHz used for cell site-to-device transmissions and 10 MHz for devices to talk to the cell sites…