§ 25.287   Requirements pertaining to operation of mobile stations in the NVNG,
1.5/1.6 GHz, 1.6/2.4 GHz, and 2 GHz Mobile-Satellite Service bands.

   (a)  Any mobile earth station (MES) operating in the 1530-1544 MHz and
   1626.5-1645.5 MHz bands must have the following minimum set of capabilities
   to ensure compliance with Footnote 5.353A in 47 CFR 2.106 and the priority
   and real-time preemption requirements imposed by Footnote US315.

   (1)  All  MES transmissions must have a priority assigned to them that
   preserves the priority and preemptive access given to maritime distress and
   safety communications sharing the band.

   (2) Each MES with a requirement to handle maritime distress and safety data
   communications must be capable of either:

   (i) Recognizing message and call priority identification when transmitted
   from its associated Land Earth Station (LES), or

   (ii) Accepting message and call priority identification embedded in the
   message or call when transmitted from its associated LES and passing the
   identification to shipboard data message processing equipment.

   (3) Each MES must be assigned a unique terminal identification number that
   will be transmitted upon any attempt to gain access to a system.

   (4) After an MES has gained access to a system, the mobile terminal must be
   under control of an LES and must obtain all channel assignments from it.

   (5) All MESs that do not continuously monitor a separate signaling channel
   or signaling within the communications channel must monitor the signaling
   channel at the end of each transmission.

   (6) Each MES must automatically inhibit its transmissions if it is not
   correctly receiving separate signaling channel or signaling within the
   communications channel from its associated LES.

   (7) Each MES must automatically inhibit its transmissions on any or all
   channels  upon  receiving a channel-shut-off command on a signaling or
   communications channel it is receiving from its associated LES.

   (8) Each MES with a requirement to handle maritime distress and safety
   communications must have the capability within the station to automatically
   preempt lower precedence traffic.

   (b)  Any  LES  for  an  MSS  system operating in the 1530-1544 MHz and
   1626.5-1645.5 MHz bands must have the following minimum set of capabilities
   to ensure compliance with Footnotes 5.353A and the priority and real-time
   preemption requirements imposed by Footnote US315. An LES fulfilling these
   requirements must not have any additional priority with respect to FSS
   stations operating with other systems.

   (1) LES transmissions to MESs must have a priority assigned to them that
   preserves the priority and preemptive access given to maritime distress and
   safety communications pursuant to paragraph (a) of this section.

   (2) The LES must recognize the priority of calls to and from MESs and make
   channel assignments taking into account the priority access that is given to
   maritime distress and safety communications.

   (3) The LES must be capable of receiving the MES identification number when
   transmitted and verifying that it is an authorized user of the system to
   prohibit unauthorized access.

   (4) The LES must be capable of transmitting channel assignment commands to
   the MESs.

   (5) The communications channels used between the LES and the MES shall have
   provision for signaling within the voice/data channel, for an MES that does
   not continuously monitor the LES signaling channel during a call.

   (6) The LES must transmit periodic control signals to MESs that do not
   continuously monitor the LES signaling channel.

   (7) The LES must automatically inhibit transmissions to an MES to which it
   is  not  transmitting  in  a signaling channel or signaling within the
   communications channel.

   (8) The LES must be capable of transmitting channel-shut-off commands to
   MESs on signaling or communications channels.

   (9) Each LES must be capable of interrupting, and if necessary, preempting
   ongoing  routine  traffic  from an MES in order to complete a maritime
   distress, urgency or safety call to that MES.

   (10) Each LES must be capable of automatically turning off one or more of
   its associated channels in order to complete a maritime distress, urgency or
   safety call.

   (c) No person without an FCC license for such operation may transmit to a
   space  station  in  the  NVNG,  1.5/1.6  GHz,  1.6/2.4  GHz,  or 2 GHz
   Mobile-Satellite  Service from anywhere in the United States except to
   receive service from the holder of a pertinent FCC blanket license or from
   another party with the permission of such a blanket licensee.

   (d)  The  holder  of  an  FCC  blanket license for operation of mobile
   transmitters or transceivers for communication via an NVNG, 1.6/2.4 GHz,
   1.5/1.6 GHz, or 2 GHz Mobile Satellite Service system will be responsible
   for  operation  of any such device to receive service provided by that
   licensee or provided by another party with the blanket licensee's consent.
   Operators of such satellite systems must not transmit communications to or
   from  such devices in the United States unless such communications are
   authorized under a service contract with the holder of a pertinent FCC
   blanket earth station license or under a service contract with another party
   with authority for such operation delegated by such a blanket licensee.

   [ 79 FR 8326 , Feb. 12, 2014]

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Subpart E [Reserved]

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Subpart F—Competitive Bidding Procedures for DARS

   Source:  62 FR 11106 , Mar. 11, 1997, unless otherwise noted.

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