NEWS
Federal Communications Commission
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Washington, D. C.  20554
This is an unofficial announcement of Commission action.  Release of the full text of a Commission order constitutes official action.
See MCI v. FCC. 515 F 2d 385 (D.C. Circ 1974).
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FOR IMMEDIATE RELEASE: NEWS MEDIA CONTACT:
March 22, 2007 Chelsea Fallon: (202) 418-7991
FCC ADDRESSES RULES FOR PRIVATE LAND MOBILE RADIO SYSTEMS TO 
TRANSITION TO 6.25 kHz NARROWBAND TECHNOLOGY
Washington, D.C. –Today, the Federal Communications Commission (FCC) adopted a 
Third Report and Order (Order) that declines, for now, to establish a fixed date for private land 
mobile radio (PLMR) systems in the 150-174 MHz and 421-512 MHz bands to transition to 6.25 
kHz narrowband technology, but strongly urges licensees to consider migrating directly to 6.25 
kHz technology rather than first adopting 12.5 kHz technology and later migrating to 6.25 kHz 
technology.  The Order also revises the implementation date of the 6.25 kHz equipment 
certification rules from January 1, 2005 to January 1, 2011.
In today’s Order, the FCC declined to establish, at the present time, a fixed date for 
PLMR systems to transition to 6.25 kHz narrowband technology.  There are no accepted industry 
standards for 6.25 kHz technology, which would be a bar to interoperability.  Further, 6.25 kHz 
technology is not mature enough to warrant setting a migration schedule. The FCC reiterated, 
however, that it will expeditiously establish a schedule for transition to 6.25 kHz narrowband 
technology once the technology matures to the point that sufficient equipment is available for 
testing.
The FCC also decided in today’s Order to change the date for the implementation of the 
6.25 kHz equipment certification rules from January 1, 2005 to January 1, 2011, but strongly 
urges licensees to consider migrating directly to 6.25 kHz technology by January 1, 2013 rather 
than first adopting 12.5 kHz technology and later migrating to 6.25 kHz technology.  Deferring 
the implementation date permits manufacturers to develop and test equipment after the expected 
finalization of 6.25 kHz standards in the near future.  
Action by the Commission on March 22, 2007, by Third Report and Order (FCC 07-39).
Chairman Martin and Commissioners Copps, Adelstein, Tate, and McDowell.
For additional information, contact Scot Stone at (202) 418-0638 or Scot.Stone@fcc.gov, or 
Thomas Eng at (202) 418-0019 or Thomas.Eng@fcc.gov.
WT Docket No. 99-87.
– FCC –
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