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Huawei Technologies Co., Ltd. Address: Huawei Industrial Base,Bantian Longgang,Shenzhen 518129, Post ZIP: 518129 P.R China To: CETECOM Fax: NULL From:Zhang Xinghai Fax:0086-755-89652518 Tel:0086-755-89650863 Email address: [email protected] Web:www.huawei.com Subject: Letter of Confidentiality Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Gentlemen: This letter is to comply with the Code of Federal Regulations Title 47 Section 0.457 and 0.459 pertaining to confidential material. Huawei Technologies Co., Ltd. would like the following documents regarding this submission for FCC ID: QISRRU3606-800AB to be kept confidential: 1 Schematic diagram 2 Block Diagram. 3 Parts list (BOM) Information. 4 Operational description. 5. Tune-up procedure The above material contains trade secrets or technical data, which would customarily be guarded from competitors. We do not want these documents to be accessible to the general public. Sincerely, For and Behalf of: Huawei Technologies Co., Ltd. Zhang Xinghai EMC Laboratory Manager

Huawei Technologies Co., Ltd. Administration Building, Huawei Base, Bantian, Longgang District, Shenzhen 518129 P.R.C. +86 755 28780808 www.huawei.com Huawei internal reference RCT-US-01-01 USA FCC Short Term Confidentiality Request template Effective date: 2007-01-06 Version 1.1 Short Term Confidentiality Request 2011-01-20 Federal Communications Commission Office of Engineering and Technology Equipment Authorization Division 7345 Oakland Mills Road Columbia, Maryland 21046 Subject: SHORT-TERM Confidentiality Request for FCC ID: QISRRU3606-800AB Product Name: Remote Radio Unit Product Model: RRU3606 To whom maybe concern: Pursuant to sections 0.457 and 0.459 of CFR 47 and to avoid premature release of sensitive information prior to marketing or release of the product to the public, Huawei Technologies Co., Ltd requests the following documents contained in this certification application be temporarily withheld from public disclosure for an initial period of 45days: 1. External Photos 2. Internal Photos 3. Test Setup Photos 4. Users Manual The applicant also acknowledges that they will also provide appropriate notice to CETECOM should either of the following occur: A) If the applicant requires additional 45 day extension periods they will notify CETECOM with a new request letter at least 7 days prior to the short-term confidentiality expiration date-[Note: up to maximum of 3 extensions only are allowed], or b) Immediately notify CETECOM in the event the information regarding the product of the product is made available to the public. CETECOM will then release the documents listed above for public disclosure pursuant to FCC Public Notice DA 04-1705. Sincerely, Zhang XingWei Regulation Compliance Manager Print name Signature Title

Figure 1, Front view of RRU3606 Figure 2, Rear view of RRU3606 Figure 3, Bottom view of RRU3606

2009-4-21 Figure 1, Internal view of RRU30606 Figure 2, Top view of HPA PCB 2009-4-21 Figure 3, Bottom view of HPA PCB Figure 4, Top view of TRX PCB 2009-4-21 Figure 5, Bottom view of TRX PCB

FCC Maximum Permissible Exposure (MPE) Estimation Report Product Name: Remote Radio Unit Model Number: RRU3606 Report No: SYBH(R) 002122010 EB-2 FCC ID: QISRRU3606-800AB Reliability Laboratory of Huawei Technologies Co., Ltd. Huawei Base, Bantian, Longgang District, Shenzhen 518129, P.R. China Tel: +86 755 28780808 Fax: +86 755 89652518 FCC MPE Estimation Report of RRU3606 FCC ID: QIS RRU3606-800AB Security Level: Public Report No: SYBH(R)002122010 EB-2 Confidential Information of Huawei. No Distribution without Written Permission Page2, Total12 Notice 1. The laboratory has obtained the accreditation of China National Accreditation Service for Conformity Assessment (CNAS), and accreditation number: L0310. 2. The laboratory has obtained the accreditation of THE AMERICAN ASSOCIATION FOR LABORATORY ACCREDITATION (A2LA), and Accreditation Council Certificate Number: 2174.01. 3. The laboratory has been listed on the US Federal Communications Commission list of test facilities recognized to perform electromagnetic emissions measurements. The site recognition number is 97456. 4. The laboratory has been listed by industry Canada to perform electromagnetic emission measurement. The site recognition number is 6369A-1. 5. The laboratory also has been listed by the VCCI to perform EMC measurements. The accreditation number is R2364, C2583, and T256. 6. The test report is invalid if not marked with "exclusive stamp for the test report". 7. The test report is invalid if not marked with the stamps or the signatures of the persons responsible for performing, revising and approving the test report. 8. The test report is invalid if there is any evidence of erasure and/or falsification. 9. If there is any dissidence for the test report, please file objection to the test centre within 15 days from the date of receiving the test report. 10. Normally, the test report is only responsible for the samples that have undergone the test. 11. Context of the test report cannot be used partially or in full for publicity and/or promotional purposes without previous written approval of the laboratory. FCC MPE Estimation Report of RRU3606 FCC ID: QIS RRU3606-800AB Security Level: Public Report No: SYBH(R)002122010 EB-2 Confidential Information of Huawei. No Distribution without Written Permission Page3, Total12 REPORT ON FCC Maximum Permissible Exposure (MPE) Estimation of Remote Radio Unit Model Number: RRU3606 Report No: SYBH(R) 002122010 EB-2 FCC ID: QISRRU3606-800AB REGULATION FCC 47CFR Part 1 (10-1-07 Edition) OET Bulletin 65 (Edition 97-01) CONCLUSION COMPLIANT General Manager 2010-12-27 Zhang Xinghai Date (y-m-d) Name Signature Technical Responsibility For Area of Testing 2010-12-27 Hu Jun Date (y-m-d) Name Signature Test Lab Engineer 2010-12-27 Liang Changguan Date (y-m-d) Name Signature FCC MPE Estimation Report of RRU3606 FCC ID: QIS RRU3606-800AB Security Level: Public Report No: SYBH(R)002122010 EB-2 Confidential Information of Huawei. No Distribution without Written Permission Page4, Total12 Contents 1 EUT Information ................................................................................................................................5 1.1 PRODUCT DESCRIPTION................................................................................................................5 1.2 TECHNICAL DESCRIPTION OF EUT.................................................................................................5 2 FCC RF Exposure Requirements .....................................................................................................6 2.1 FCC ROUTINE ENVIRONMENTAL EVALUATION.................................................................................6 2.2 MAXIMUM PERMISSIBLE EXPOSURE (MPE)....................................................................................8 3 RF Exposure Evaluation...................................................................................................................9 3.1 PREDICTION OF THE EXPOSURE TO ELECTROMAGNETIC FIELDS.......................................................9 3.2 CALCULATION OF THE SAFE DISTANCE...........................................................................................9 4 Location of BTS Antennas.............................................................................................................11 4.1 EXCLUSIONS ZONES....................................................................................................................11 4.2 GUIDELINES ON ARRANGING ANTENNA SITES................................................................................11 FCC MPE Estimation Report of RRU3606 FCC ID: QIS RRU3606-800AB Security Level: Public Report No: SYBH(R)002122010 EB-2 Confidential Information of Huawei. No Distribution without Written Permission Page5, Total12 1 EUT Information 1.1 Product Description RRU3606 is used for up-conversion and down-conversion of signals and for power amplification. The RRU3606 performs the following functions: • On the forward link, implementing up-conversion and power amplification for modulated transmitted signals and filtering the transmitted signals to make them meet the requirements of the air interface protocol • On the reverse link, filtering the signals received by the antenna to suppress out-band interference and then performing low noise amplification, down-conversion, and channel-selective filtering. 1.2 Technical Description of EUT Table 1. Service and Test Mode List Operating frequency band: Band Class 0: Uplink (RX): 824 to 849 MHz Downlink (TX): 869 to 894 MHz Maximum power input to the antenna: Band Class 0: a) one carrier: 41.95 dBm (for cdma2000 1X) 42.43 dBm (for cdma2000 1X EV-DO) b) two carriers:45.13 dBm (for cdma2000 1X) 45.31 dBm (for cdma2000 1X EV-DO) c) three carriers:46.63 dBm (for cdma2000 1X) 46.94 dBm (for cdma2000 1X EV-DO) b) three carriers:48.07 dBm (for cdma2000 1X) 48.40 dBm (for cdma2000 1X EV-DO) Note: The maximum 48.40 dBm is used for the RF …

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FCC Test Report Product Name: Remote Radio Unit Model Number: RRU3606 Report No: SYBH(R)002122010EB-1 FCC ID: QISRRU3606-800AB Reliability Laboratory of Huawei Technologies Co., Ltd. Huawei Base, Bantian, Longgang District, Shenzhen 518129, P.R. China Tel: +86 755 28780808 Fax: +86 755 89652518 FCC Test Report of RRU3606 FCC ID: QISRRU3606-800AB Security Level: Public Report No: SYBH(R)002122010EB-1 Confidential Information of Huawei. No Distribution without Written Permission Page2, Total41 Notice 1. The laboratory has obtained the accreditation of China National Accreditation Service for Conformity Assessment (CNAS), and accreditation number: L0310. 2. The laboratory has obtained the accreditation of THE AMERICAN ASSOCIATION FOR LABORATORY ACCREDITATION (A2LA), and Accreditation Council Certificate Number: 2174.01. 3. The laboratory has been listed on the US Federal Communications Commission list of test facilities recognized to perform electromagnetic emissions measurements. The site recognition number is 97456. 4. The laboratory has been listed by industry Canada to perform electromagnetic emission measurement. The site recognition number is 6369A-1. 5. The laboratory also has been listed by the VCCI to perform EMC measurements. The accreditation number is R2364, C2583, and T256. 6. The test report is invalid if not marked with "exclusive stamp for the test report". 7. The test report is invalid if not marked with the stamps or the signatures of the persons responsible for performing, revising and approving the test report. 8. The test report is invalid if there is any evidence of erasure and/or falsification. 9. If there is any dissidence for the test report, please file objection to the test centre within 15 days from the date of receiving the test report. 10. Normally, the test report is only responsible for the samples that have undergone the test. 11. Context of the test report cannot be used partially or in full for publicity and/or promotional purposes without previous written approval of the laboratory. FCC Test Report of RRU3606 FCC ID: QISRRU3606-800AB Security Level: Public Report No: SYBH(R)002122010EB-1 Confidential Information of Huawei. No Distribution without Written Permission Page3, Total41 REPORT ON FCC Test of Remote Radio Unit Model Name: RRU3606 Report No: SYBH(R) 002122010EB-1 REGULATION 47 CFR FCC Part 2, Subpart J FCC CFR47 Part 22: Subpart H; CONCLUSION PASSED General Manager 2010-12-27 Zhang Xinghai Date (y-m-d) Name Signature Technical Responsibility For Area of Testing 2010-12-27 Hu Jun Date (y-m-d) Name Signature Test Lab Engineer 2010-12-27 Liang Changguan Date (y-m-d) Name Signature FCC Test Report of RRU3606 FCC ID: QISRRU3606-800AB Security Level: Public Report No: SYBH(R)002122010EB-1 Confidential Information of Huawei. No Distribution without Written Permission Page4, Total41 Contents 1 Summary............................................................................................................................................5 2 Product Description...........................................................................................................................6 2.1 PRODUCTION INFORMATION OF THE EQUIPMENT UNDER TEST (EUT)...................................................6 2.2 MODIFICATION INFORMATION...........................................................................................................6 3 Test Site Description..........................................................................................................................7 3.1 TESTING PERIOD............................................................................................................................7 3.2 APPLIED STANDARDS......................................................................................................................8 4 Product Description...........................................................................................................................9 4.1 TECHNICAL CHARACTERISTICS.........................................................................................................9 4.2 EUT IDENTIFICATION LIST.............................................................................................................11 5 Main Test Instruments ......................................................................................................................12 6 Transmitter Measurements..............................................................................................................13 6.1 MAXIMUM CHANNEL POWER..........................................................................................................14 6.2 MODULATION CHARACTERISTICS....................................................................................................19 6.3 OCCUPIED BANDWIDTH.................................................................................................................22 6.4 BAND EDGES COMPLIANCE............................................................................................................25 6.5 SPURIOUS EMISSION AT ANTENNA TERMINAL...................................................................................28 6.6 RADIATED SPURIOUS EMISSION.....................................................................................................32 6.7 FREQUENCY STABILITY.................................................................................................................36 7 System Measurement Uncertainty ....................................................................................................40 8 Appendices......................................................................................................................................41 FCC Test Report of RRU3606 FCC ID: QISRRU3606-800AB Security Level: Public Report No: SYBH(R)002122010EB-1 Confidential Information of Huawei. No Distribution without Written Permission Page5, Total41 1 Summary The…

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FCC Test Report of RRU3606 FCC ID: QISRRU3606-800AB Security Level: Public Report No: SYBH(R)002122010EB-1 Confidential Information of Huawei. No Distribution without Permission Page1, Total81 Appendix A Modulation Characteristic Measurement According to CFR 47 (FCC) part 2.1047 FCC Test Report of RRU3606 FCC ID: QISRRU3606-800AB Security Level: Public Report No: SYBH(R)002122010EB-1 Confidential Information of Huawei. No Distribution without Permission Page2, Total81 CDMA2000 1X: RC1 Channel 1 03 Offset 41.2 dB A LVL B 3DB Ref 55.0 dBm Ref 55.0 dBm Ref 55.0 dBm Att 40 dB Att 40 dB 1 CLRWR BS,1X,C0 :CODE POWER dB PICHPCG 0 Ref 55.0 dBm Ref 55.0 dBm Ref 55.0 dBm Att 40 dB Att 40 dB 1 CLRWR RESULT SUMMARY TABLE Offset 41.2 dBPCG 0 LVL TRG Start Code 0 4 Code/Stop Code 63 CF 870.03 MHz 3DB CF 870.03 MHz EXT Chan 17.64 Chan 17.64 SR 19.2 ksps SR 19.2 ksps -63 -56 -49 -42 -35 -28 -21 -14 -7 RESULTS FOR SET 0 PCG 0:GLOBAL RESULTS FOR SET 0: Total PWR42.23 dBm Carr Freq Error184.06 mHz Pilot PWR35.20 dBm Carr Freq Error0.00 ppm RHO0.97393 Chip Rate Error-0.34 ppm Composite EVM16.36 % Trg to Frame-1.384368 μs Pk CDE (SF 64)-28.93 dB Active Channels9 IQ Imbal/Offset1.53/0.50 % CHANNEL RESULTS: ModulationBPSK Symbol Rate19.2 ksps Timing Offset -.-- ns Channel.SF17.64 Phase Offset -.-- mrad Channel Power Rel-3.43 dB Channel Power Abs31.77 dBm Symbol EVM7.90 % rms Symbol EVM15.67 % Pk Date: 21.DEC.2010 17:25:47 FCC Test Report of RRU3606 FCC ID: QISRRU3606-800AB Security Level: Public Report No: SYBH(R)002122010EB-1 Confidential Information of Huawei. No Distribution without Permission Page3, Total81 Channel 311 33 Offset 41.2 dB A LVL B 3DB Ref 55.0 dBm Ref 55.0 dBm Ref 55.0 dBm Att 40 dB Att 40 dB 1 CLRWR BS,1X,C0 :CODE POWER dB PICHPCG 0 Ref 55.0 dBm Ref 55.0 dBm Ref 55.0 dBm Att 40 dB Att 40 dB 1 CLRWR RESULT SUMMARY TABLE Offset 41.2 dBPCG 0 LVL TRG Start Code 0 4 Code/Stop Code 63 CF 879.33 MHz 3DB CF 879.33 MHz EXT Chan 17.64 Chan 17.64 SR 19.2 ksps SR 19.2 ksps -63 -56 -49 -42 -35 -28 -21 -14 -7 RESULTS FOR SET 0 PCG 0:GLOBAL RESULTS FOR SET 0: Total PWR42.37 dBm Carr Freq Error128.65 mHz Pilot PWR35.32 dBm Carr Freq Error0.00 ppm RHO0.97908 Chip Rate Error0.56 ppm Composite EVM14.62 % Trg to Frame-1.406197 μs Pk CDE (SF 64)-30.94 dB Active Channels9 IQ Imbal/Offset0.07/0.20 % CHANNEL RESULTS: ModulationBPSK Symbol Rate19.2 ksps Timing Offset -.-- ns Channel.SF17.64 Phase Offset -.-- mrad Channel Power Rel-3.19 dB Channel Power Abs32.13 dBm Symbol EVM8.05 % rms Symbol EVM16.33 % Pk Date: 21.DEC.2010 17:24:15 FCC Test Report of RRU3606 FCC ID: QISRRU3606-800AB Security Level: Public Report No: SYBH(R)002122010EB-1 Confidential Information of Huawei. No Distribution without Permission Page4, Total81 Channel 596 88 Offset 41.2 dB A LVL B 3DB Ref 55.0 dBm Ref 55.0 dBm Ref 55.0 dBm Att 40 dB Att 40 dB 1 CLRWR BS,1X,C0 :CODE POWER dB PICHPCG 0 Ref 55.0 dBm Ref 55.0 dBm Ref 55.0 dBm Att 40 dB Att 40 dB 1 CLRWR RESULT SUMMARY TABLE Offset 41.2 dBPCG 0 LVL EXT Start Code 0 4 Code/Stop Code 63 CF 887.88 MHz 3DB CF 887.88 MHz Chan 17.64 Chan 17.64 SR 19.2 ksps SR 19.2 ksps TRG -63 -56 -49 -42 -35 -28 -21 -14 -7 RESULTS FOR SET 0 PCG 0:GLOBAL RESULTS FOR SET 0: Total PWR41.67 dBm Carr Freq Error-1.27 Hz Pilot PWR34.62 dBm Carr Freq Error-0.00 ppm RHO0.98569 Chip Rate Error-0.21 ppm Composite EVM12.05 % Trg to Frame-1.246537 μs Pk CDE (SF 64)-33.85 dB Active Channels9 IQ Imbal/Offset0.25/0.37 % CHANNEL RESULTS: ModulationBPSK Symbol Rate19.2 ksps Timing Offset -.-- ns Channel.SF17.64 Phase Offset -.-- mrad Channel Power Rel-3.17 dB Channel Power Abs31.45 dBm Symbol EVM5.80 % rms Symbol EVM15.83 % Pk Date: 21.DEC.2010 17:22:07 FCC Test Report of RRU3606 FCC ID: QISRRU3606-800AB Security Level: Public Report No: SYBH(R)002122010EB-1 Confidential Information of Huawei. No Distribution without Permission Page5, Total81 RC3 Channel 1 A B 3DB TRG 3DB EXT Offset 41.2 dB Ref 71.2 dBm Ref 71.2 dBm Ref 71.2 dBm 1 CLRWR BS,1X,C0 :CODE POWER CF 870.03 MHzdB PICH Chan 17.64 PCG 0 Start Code 0 4 Code/Stop Code 63 LVL Ref 71.2 dBm Ref 71.2 dBm Ref 71.2 dBm 1 CLRWR RESULT SUMMARY TABLE CF 870.03 MHzOffset 41.2 dB Chan 17.64 PCG 0 LVL Att 55 dB Att 55 dB SR 19.2 ksps Att 55 dB Att 55 dB SR 19.2 ksps -63 -56 -49 -42 -35 -28 -21 -14 -7 RESULTS FOR SET 0 PCG 0:GLOBAL RESULTS FOR SET 0: Total PWR42.60 dBm Carr Freq Error-46.57 mHz Pilot PWR35.59 dBm Carr Freq Error-0.00 ppm RHO0.99223 Chip Rate Error0.72 ppm Composite EVM8.85 % Trg to Frame-1.386757 μs Pk CDE (SF 64)-36.22 dB Active Channels9 IQ Imbal/Offset0.22/0.14 % CHANNEL RESULTS: ModulationQPSK Symbol Rate19.2 ksps Timing Offset -.-- ns Channel.SF17.64 Phase Offset -.-- mrad Channel Power Rel-3.22 dB Channel Power Abs32.36 dBm Symbol EVM4.05 % rms Symbol EVM7.52 % Pk Date: 21.DEC.2010 16:44:23 FCC Test Report of RRU3606 FCC ID: QISRRU3606-800AB Security Level: Public Report No: SYBH(R)002122010EB-1 Confidential Information of Huawei. No Distribution without Permission Page6, Total81 Channel 311 A B 3DB TRG Offset 41.2 dB 1 CLRWR BS,1X,C0 :CODE POWER dB PICHPCG 0 LVL 1 CLRWR RESULT SUMMARY TABLE Offset 41.2 dBPCG 0 LVL Start Code 0 4 Code/Stop Code 63 3DB Chan 17.64 Chan 17.64 SR 19.2 ksps SR 19.2 ksps Ref 55.0 dBm Ref 55.0 dBm Ref 55.0 dBm CF 879.33 MHz Ref 55.0 dBm Ref 55.0 dBm Ref 55.0 dBm CF 879.33 MHz Att 40 dB Att 40 dB Att 40 dB Att 40 dB EXT -63 -56 -49 -42 -35 -28 -21 -14 -7 RESULTS FOR SET 0 PCG 0:GLOBAL RESULTS FOR SET 0: Total PWR42.51 dBm Carr Freq Error-738.60 mHz Pilot PWR35.43 dBm Carr Freq Error-0.00 ppm RHO0.98981 Chip Rate Error-0.68 ppm Composite EVM10.14 % Trg to Frame-1.405294 μs Pk CDE (SF 64)-34.97 dB Active Channels9 IQ Imbal/Offset0.62/0.42 % CHANNEL RESULTS: ModulationQPSK Symbol Rate19.2 ksps Timing Offset -.-- ns Channel.SF17.64 Phase Offset -.-- mrad Channel Power Rel-3.17 dB Channel Power Abs32.26 dBm Symbol EVM4.39 % rms Symbol EVM10.12 % Pk Date: 21.DEC.2010 16:45:51 FCC Test Report of RRU3606 FCC ID: QISRRU3606-800AB Security Level: Pub…

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1 Radiated Disturbance/ Radiated Spurious Emission (30MHz-1GHz) ......................................2 2 Radiated Spurious Emission (above 1GHz)..............................................................................2 1 Radiated Disturbance/ Radiated Spurious Emission (30MHz-1GHz) 2 Radiated Spurious Emission (above 1GHz)