What is Narrowbanding?
Private Land Mobile Radio (LMR) Systems - including municipal government, state and local public safety systems - use blocks of radio spectrum called channels. Historically, LMR systems have used 25 kHz wide channels. In December 2004, the Federal Communications Commission mandated that all private LMR users operating below 512 MHz move to 12.5 kHz narrowband voice channels and highly efficient data channel operations by January 1, 2013. This migration complements a National Telecommunications and Information Administration mandate for more rapid Federal agency migration to 12.5 kHz narrowband operation.
Using narrowband channels will ensure that agencies take advantage of more efficient technology and, by reducing channel width, will allow additional channels to exist within the same spectrum space.
Narrowbanding Brochure
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