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                       FEDERAL COMMUNICATIONS COMMISSION

                               ENFORCEMENT BUREAU

                              South Central Region

                                  Miami Office

                                P.O. Box 520617

                              Miami, FL 33152-0617

                                 July 20, 2010

   Via Certified Mail:

   Sling Broadband, LLC

   Miami, Florida

                       NOTICE OF UNLICENSED OPERATION AND

                      NOTIFICATION OF HARMFUL INTERFERENCE

   Case Number: EB-10-MA-0111

   Document Number: W201032600061

   On June 9, 2010, in response to a complaint from the Federal Aviation
   Administration ("FAA"), agents from the Enforcement Bureau's Miami Office
   confirmed by direction finding techniques that radio emissions on
   frequency 5.650 GHz were emanating from a radio transmitter device located
   on antenna structure #1028046 in Miami, Florida. These transmissions were
   interfering with the FAA's Terminal Doppler Weather Radar ("TDWR") serving
   the Fort Lauderdale-Hollywood International Airport. The device in use was
   the Rocket M5 model manufactured by Ubiquiti Networks with FCC ID SWX-M5
   ("Ubiquiti Rocket M5"). On June 11, 2010, an agent contacted your CTO
   (Managing Partner) about your transmissions on 5.650 GHz. The agent
   confirmed that the interference to the TDWR ceased when your Ubiquiti
   Rocket M5 device was tuned to a different frequency.

   Radio stations must be licensed by the Federal Communications Commission
   ("FCC") pursuant to 47 U.S.C. S: 301. The only exception to this licensing
   requirement is for certain transmitters using or operating at a power
   level or mode of operation that complies with the standards established in
   Part 15 of the Commission's rules, 47 C.F.R. S:S: 15.1 et seq. Nonlicensed
   operation pursuant to Part 15 of the FCC's rules, however, is conditioned
   upon compliance with all applicable regulations in the subpart, 47 C.F.R.
   S: 15.1(b). All intentional radiators operating pursuant to Part 15 of the
   FCC's rules must be certified for use as a Part 15 device, 47 C.F.R. S:
   15.201(b).

   The Ubiquiti Rocket M5 device is not authorized for use on frequency 5.650
   GHz. Accordingly, your operation of the Ubiquiti Rocket M5 device on
   frequency 5.650 GHz does not comply with the requirements of Part 15 of
   the FCC's rules and should therefore be licensed by the FCC. The FCC has
   no record of a license being issued to you to operate a transmitter on
   5.650 GHz from your location. Thus, your operation was in violation of 47
   U.S.C. S: 301.

   Nonlicensed operation of a radio transmitter is also subject to the
   condition that it must not cause harmful interference and, if harmful
   interference occurs, operation of the device must cease. See 47 C.F.R. S:
   15.5. Harmful interference is defined as "[a]ny emission, radiation or
   induction that endangers the functioning of a radio navigation service or
   of other safety services or seriously degrades, obstructs or repeatedly
   interrupts a radio communications service." See 47 C.F.R. S: 15.3(m).

   You are hereby notified that the Ubiquiti Rocket M5 device operating on
   5.650  GHz was causing harmful interference to the TDWR that serves the
   Fort Lauderdale-Hollywood International Airport.

   You are also hereby warned that operation of radio transmitting equipment
   without a valid radio station authorization, including the use of
   certified equipment on unauthorized frequencies, and/or operation of
   otherwise authorized equipment that continues to cause harmful
   interference after your receipt of this warning, constitutes a violation
   of the Federal laws cited above and could subject the operator to severe
   penalties, including, but not limited to, substantial monetary fines, in
   rem arrest action against the offending radio equipment, and criminal
   sanctions including imprisonment. (See 47 U.S.C. S:S: 401, 501, 503 and
   510).

   UNLICENSED OPERATION ON FREQUENCY 5.650 GHz MUST NOT RESUME. NONLICENSED
   OPERATION OF A PART 15 DEVICE MAY NOT RESUME UNLESS YOU ARE IN FULL
   COMPLIANCE WITH PART 15 OF THE FCC'S RULES.

   You have ten (10) days from the date of this notice to respond with any
   evidence that the transmitter you are using is certified for use as a Part
   15 device  to operate on 5.650 GHz. Your response should also describe the
   steps you are taking to ensure that your operation does not interfere with
   the TDWR that serves the Fort Lauderdale-Hollywood International Airport, 
   as well as any TDWR serving any other airport. Your response should be
   sent to the address in the letterhead and reference the listed case and
   document number.  Under the Privacy Act of 1974, 5 U.S.C. S: 552a(e)(3),
   we are informing you that the FCC's staff will use all relevant material
   information before it to determine what, if any, enforcement action is
   required to ensure your compliance with FCC Rules. This will include any
   information that you disclose in your reply.

   You may contact this office if you have any questions.

   Stephanie Dabkowski

   Resident Agent

   Miami Office

   Attachments:

   Excerpts from the Communications Act of 1934, As Amended

   According to its equipment authorization, FCC ID SWX-M5, the Ubiquiti
   Rocket M5 device is authorized pursuant to Section 15.247 of the FCC's
   Rules to operate only in the 5745 to 5825 MHz band. See 47 C.F.R. S:
   15.247.

   On June 11, 2010, your CTO (Managing Partner) admitted that the dynamic
   frequency selection ("DFS") functionality on your Ubiquiti Rocket M5
   device was disabled. If the Ubiquiti Rocket M5 had been authorized as an
   Unlicensed National Information Infrastructure (U-NII) device to operate
   on frequency 5.650 GHz, DFS would have been required to be employed. See
   47 C.F.R. S: 15.407(h)(2). Thus, even if the Ubiquiti Rocket M5 device had
   been certified as a U-NII device, your operation would not have been in
   compliance with Part 15 of the Rules.