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                       FEDERAL COMMUNICATIONS COMMISSION

                               ENFORCEMENT BUREAU

                                 WESTERN REGION

                               Los Angeles Office

                        18000 Studebaker Road, Suite 660

                               Cerritos, CA 90703

                                November 2, 2010

   Hydraulic International

   San Fernando Valley, CA

                         NOTICE OF UNLICENSED OPERATION

   Case Number: EB-10-LA-0251

   Document Number: W201132900001

   On October 25, 2010, this office received an interference complaint from
   AT&T concerning a signal on the frequency 832.65 MHz in San Fernando
   Valley, California. The signal was located to a bi-directional amplifier
   ("BDA") installed in the Hydraulic International company located at 9000
   Mason Ave., San Fernando Valley, CA 91311. On October 25, 2010, agents
   from this office met with a Hydraulic International employee who
   acknowledged to the Los Angeles agents the operation of the BDA in
   question.

   AT&T has a license to provide cellular communications on 832.65 MHz in the
   San Fernando Valley area. Section 22.383 of the Commission's Rules, which
   applies to public mobile service licensees like AT&T, provides that
   "[l]icensees may install in-building radiation systems without applying
   for authorization or notifying the FCC, provided that the locations of the
   in-building radiation systems are within the protected service area of the
   licensee's authorized transmitter(s) on the same channel or channel
   block." A licensee's authority to install a BDA does not, without further
   authorization from the licensee, permit a subscriber to install a BDA. In
   response to an inquiry from a Los Angeles agent, AT&T reported that it did
   not provide Hydraulic International authorization to install or operate a
   BDA.

   Operation of radio transmitting equipment without a valid FCC
   authorization or license is a violation of Section 301 of the
   Communications Act of 1934, as amended, and may subject the responsible
   parties to substantial monetary forfeitures, in rem arrest action against
   the offending radio equipment, and criminal sanctions including
   imprisonment. Because unlicensed operation creates a danger of
   interference to important radio communications services and may subject
   the operator to severe penalties, this warning emphasizes the importance
   of complying strictly with these legal requirements.

             UNLICENSED OPERATION MUST BE DISCONTINUED IMMEDIATELY.

   You have ten (10) days from the date of this notice to respond with any
   evidence that you have authority to operate granted by the FCC or have
   obtained consent from a licensed Common Carrier. To resolve the issues
   with respect to your authority to operate this device, and pursuant to
   Section 403 of the Communications Act of 1934, as amended, provide an
   explanation as to what has been done to correct the interference issue and
   to ensure that it will not recur; provide any agreements made with any
   cellular carrier to operate the system and include any relevant documents.
   Identify the make, model and serial number of each piece of equipment
   including the antennas if applicable.

   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 Commission'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.

   Nader Haghighat

   District Director

   Los Angeles Office

   Western Region

   Enforcement Bureau

   Attachments:

   Excerpts from the Communications Act of 1934, As Amended

   Enforcement Bureau, "Inspection Fact Sheet", March 2005

   Section 22.99 of the Commission's Rules defines "in-building radiation
   systems" as "[s]upplementary systems comprising low power transmitters,
   receivers, indoor antennas and/or leaky coaxial cable radiators, designed
   to improve service reliability inside buildings or structures located
   within the service areas of stations in the Public Mobile Services." 47
   C.F.R. S: 22.99

   47 C.F.R. S: 22.383.

   47 U.S.C. S: 301.

   See 47 U.S.C. S:S: 401, 501, 503, 510.

   47 U.S.C. S: 403.

   2