Federal Communications Commission
Washington, D.C. 20554
March 17, 2011
DA 11-511
Nadja S. Sodos-Wallace
Senior Regulatory Counsel and Assistant Secretary
Clearwire Corporation
1250 Eye Street, NW, Suite 901
Washington, DC 20005
RE:  WT Docket No. 06-136
Request for Extension of Time
NSAC, LLC
Transition of the 2500-2690 MHz Band 
Transition Areas: BTA Number 488:  San Juan, PR
BTA Number 489:  Mayagüez/Aguadilla-Ponce, PR
Dear Ms. Sodos-Wallace:
On February 22, 2011, NSAC, LLC, a wholly-owned subsidiary of Clearwire Corporation 
(together “Clearwire”), filed a request for extension of time to complete the transition for the Basic 
Trading Areas (BTA) noted above.1 For the reasons discussed below, we grant the Extension Request 
and extend the deadline for completing the transition in those BTAs to April 1, 2011.
NSAC, LLC filed Initiation Plans for the San Juan, Puerto Rico and Mayagüez/Aguadilla-Ponce, 
Puerto Rico BTAs on January 16, 2009.2 According to the Commission’s Rules, Clearwire was required 
to complete the transitions by October 16, 2010.3 Clearwire has previously been granted extensions until 
March 1, 2011 on the basis of delays in the delivery of a transmitter needed to complete the transition.4
  
1 Letter from Nadja S. Sodos-Wallace, Senior Regulatory Counsel and Assistant Secretary, Clearwire Corporation, 
to Office of the Secretary, Federal Communications Commission, WT Docket No. 06-136 (filed Feb. 22, 2011) 
(Extension Request).
2 Letters from Nadja S. Sodos-Wallace, Senior Regulatory Counsel and Assistant Secretary, Clearwire Corporation, 
to Marlene H. Dortch, Secretary, Federal Communications Commission, WT Docket No. 06-136 (filed Jan. 16, 
2009).
3 See 47 C.F.R. §§ 27.1232(a) and (b)(1)(vi).
4 See Letter from John J. Schauble, Deputy Chief, Broadband Division, Wireless Telecommunications Bureau to 
Nadja Sodos-Wallace, Regulatory Counsel, Assistant Secretary, Clearwire Corporation, 25 FCC Rcd 15225 (WTB 
BD 2010); Letter from John J. Schauble, Deputy Chief, Broadband Division, Wireless Telecommunications Bureau 
to Nadja Sodos-Wallace, Regulatory Counsel, Assistant Secretary, Clearwire Corporation, 25 FCC Rcd 17771
(WTB BD 2010).
Nadja S. Sodos-Wallace 2
Clearwire states that the needed equipment will be shipped from the vendor in Arizona directly to 
the licensee on March 4, 2011.5 In order to have some extra time to deal with additional delays, 
Clearwire asks that the deadline for completing the transition be extended until April 1, 2011.6
We find that Clearwire has shown good cause for an additional extension.  It appears that 
Clearwire has acted diligently to transition the markets and has nearly completed the transition.  
Furthermore, it appears that no party would be prejudiced by a grant of this extension, particularly since 
licensees can continue operating pursuant to the old band plan until the transition is completed.  We note 
that copies of the requests were served on the affected licensees, and no oppositions were filed.  Thus, we 
grant Clearwire an extension of time to transition the San Juan, Puerto Rico and Mayagüez/Aguadilla-
Ponce, Puerto Rico BTAs until April 1, 2011.  
Accordingly, IT IS ORDERED, pursuant to Section 4(i) of the Communications Act of 1934, as 
amended, 47 U.S.C. § 154(i), and Sections 1.46 and 27.1232(b)(1)(vi) of the Commission’s Rules, 47 
C.F.R. §§ 1.46, 27.1232(b)(1)(vi) that the Request for Extension of Time filed by NSAC, LLC on 
February 22, 2011 for the San Juan, Puerto Rico and Mayagüez/Aguadilla-Ponce, Puerto Rico BTAs IS 
GRANTED, and the time for completing the transition in those BTAs IS EXTENDED TO April 1, 2011.
This action is taken under delegated authority pursuant to Sections 0.131 and 0.331 of the 
Commission’s Rules, 47 C.F.R. §§ 0.131, 0.331.  
Sincerely yours,
John J. Schauble
Deputy Chief, Broadband Division
Wireless Telecommunications Bureau
  
5 Extension Request at 1.
6 Id.