Sec.  90.547   Narrowband Interoperability channel capability requirement.

   (a) Except as noted in this section, mobile and portable transmitters
   operating on narrowband channels in the 764–776 MHz and 794–806 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  Sec. 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  Sec. 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  Sec. 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]