§ 27.75   Basic interoperability requirement.

   (a)(1)  Mobile  and  portable  stations that operate on any portion of
   frequencies in the paired 1755-1780 MHz and 2155-2180 MHz band must be
   capable of operating on all frequencies in the paired 1710-1780 MHz and
   2110-2180  MHz  band, using the same air interfaces that the equipment
   utilizes on any frequencies in the paired 1710-1780 MHz and 2110-2180 MHz
   band.

   (2) Mobile and portable stations that operate on any portion of frequencies
   in the 600 MHz band must be capable of operating on all frequencies in the
   600 MHz band using the same air interfaces that the equipment utilizes on
   any frequencies in the 600 MHz band.

   (b) The basic interoperability requirement in paragraph (a) of this section
   does not require a licensee to use any particular industry standard. Devices
   may also contain functions that are not operational in U.S. Territories.

   [ 79 FR 32413 , June 4, 2014, as amended at  79 FR 48539 , Aug. 15, 2014]

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