Manufacturers serving public-safety agencies operating LMR systems on T-Band spectrum in the 470-512 MHz swath should be allowed to develop new products that use 25 kHz channels, according to a recent filing from the National Public-Safety Telecommunications Council (NPSTC)
Mark Twain’s response to the widely circulated news reports of his death in May 1897 — “Reports of my death are greatly exaggerated” — serves as a great lead-in to one of the most troubling public-safety communications rumors of our time. Unfortunately, as ads for my favorite imported ultimate driving machine point out, “Perception is Reality.”
The FCC’s recent decision to permit the use of two 6.25 kHz channels utilizing the NXDN 4 kHz emission mask within a single 12.5 kHz channel not only offers greater spectrum efficiency to licensees operating trunked systems in the UHF band (from 450 MHz to 470 MHz), it also greatly simplifies the narrowbanding process, according to Ralph Haller, chairman of the National Public Safety Telecommunications Council.
According to Andrew Thiessen, requirements and standards lead for Public Safety Communications Research, once the LTE-based nationwide public-safety wireless broadband communications system is built, it will exist side by side with the sector’s LMR-based narrowband communications networks for at least a decade. Keep in mind that it likely will take at least a decade to build.