§  90.547   Narrowband Interoperability channel capability requirement.

   (a) Except as noted in this section, mobile and portable transmitters
   operating on narrowband channels in the 769-775 MHz and 799-805 MHz
   frequency bands must be capable of operating on all of the designated
   nationwide narrowband Interoperability channels pursuant to the
   standards specified in this part.

   (1) Mobile and portable transmitters that are designed to operate only
   on the Low Power Channels specified in § 90.531 (b)(3) and (4) are
   exempt from this Interoperability channel requirement.

   (2) Mobile and portable transmitters that are designed to operate only
   in the data mode must be capable of operation on the data
   Interoperability channels specified in § 90.531(b)(1)(i); but need not
   be capable of voice operation on other Interoperability channels.

   (3) Mobile and portable transmitters that are designed to operate only
   in the voice mode do not have to operate on the data Interoperability
   channels specified in § 90.531(b)(1)(i).

   (b) Mobile and portable transmitters designed for data are not required
   to be voice capable, and vice versa.

   [ 67 FR 61005 , Sept. 27, 2002, as amended at  72 FR 48863 , Aug. 24, 2007]