§  90.419   Points of communication.

   Normally, operations licensed under this part are intended to provide
   intrastation mobile communications. For example, a base station is
   intended to communicate with its associated mobile stations and mobile
   stations are intended to communicate between associated mobile stations
   and associated base stations of the licensee. Accordingly, operations
   between base stations at fixed locations are permitted only in the
   following situations:

   (a) Base stations licensed under subpart T of this part and those in
   the Public Safety Pool that operate on frequencies below 450 MHz, may
   communicate on a secondary basis with other base stations, operational
   fixed stations, or fixed receivers authorized in these services or
   pools.

   (b) Base stations licensed on any frequency in the Industrial/Business
   Pool and on base stations frequencies above 450 MHz in the Public
   Safety Pool may communicate on a secondary basis with other base
   stations, operational fixed stations, or fixed receivers authorized in
   these pools only when:

   (1) The messages to be transmitted are of immediate importance to
   mobile stations; or

   (2) Wireline communications facilities between such points are
   inoperative, economically impracticable, or unavailable from
   communications common carrier sources. Temporary unavailability due to
   a busy wireline circuit is not considered to be within the provisions
   of this paragraph.

   (c) Operational fixed stations may communicate with units of associated
   mobile stations only on a secondary basis.

   (d) Operational fixed stations licensed in the Industrial/Business Pool
   may communicate on a secondary basis with associated base stations
   licensed in these services when:

   (1) The messages to be transmitted are of immediate importance to
   mobile stations; or

   (2) Wireline communications facilities between such points are
   inoperative, economically impracticable, or unavailable from
   communications common carrier sources. Temporary unavailability due to
   a busy wireline circuit is not considered to be within the provisions
   of this paragraph.

   (e) Travelers' Information Stations are authorized to transmit certain
   information to members of the traveling public (see § 90.242).

   (f) CMRS licensees in the SMR categories of part 90, subpart S, CMRS
   providers authorized in the 220 MHz service of part 90, subpart T, CMRS
   paging operations as defined by part 90, subpart P and for-profit
   interconnected business radio services with eligibility defined by
   § 90.35 are permitted to utilize their assigned spectrum for fixed
   services on a co-primary basis with their mobile operations.

   [ 61 FR 45356 , Aug. 29, 1996, as amended at  62 FR 18933 , Apr. 17, 1997;
    72 FR 35199 , June 27, 2007]