ISICSB - Iowa Statewide Interoperable Communications Board


The Federal Communication Commission (FCC) has mandated that by December 31, 2012, "all VHF and UHF Public Safety and Industrial/Business land mobile radio (LMR) systems in the 150-174 MHz and 421-512 MHz bands" must migrate from 25 kHz channel bandwidth to 12.5 kHz or narrower technology.

According to the FCC, this Federal narrowbanding mandate "will ensure more efficient use of spectrum, relieve congestion, and result in increased channel availability for LMR systems."

The ISICSB has assembled several resources to assist agencies in understanding this Federally unfunded mandate, and complying with it by 12/31/2012, as contained in the following pages.

Of particular note, we have included the Iowa State Patrol Narrowbanding Schedule to assist agencies in coordinating their narrowbanding conversions, if they so desire.


FCC Narrowbanding Enforcement Advisory

Narrowbanding Summary Tracker Tool Information

Narrowbanding Fact Sheet

FCC Supplemental Guidance for Narrowbanding (2/21/2012)

FCC Issues Narrowbanding Reminder (Jan. 5, 2012)

FCC Issues Narrowbanding Reminder on July 13, 2011

Narrowband Checklist

A Practical Guide to Narrowbanding.

Narrowbanding Coordination is Critical

Narrowbanding Executive Memo

Narrowbanding: Will It Affect Your Municipality?

Request for Interoperability Funding, 2012

Request for Operational Funding, 2012

FCC Issues Narrowbanding Reminder (Jan. 5, 2012)





Last Updated: 09-14-2013 (SRA)