QISRRU3701C-2500Remote Radio Unit for WiMAX Base Station

Huawei Technologies Co., Ltd. Address: Huawei Industrial Base,Bantian Longgang,Shenzhen 518129, P.R China Post ZIP: 518129 Page: 1/1 To: EMCC Fax: NULL From:Zhang Xinghai Fax:0086-755-89652518 Tel:0086-755-89650863 Email address: [email protected] Http: 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: QISRRU3701C-2500 to be kept confidential: 1. Internal photos 2. Schematic diagram & PCB layout. 3. Block Diagram. 4. Parts list (BOM) Information. 5. Operational description. 6. Tune-up procedure 7. User’s manual 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

2007-10-23 1, 3

Report No.: SYBH(R)164082007EB-1 FCC ID: QISRRU3701C-2.5G FCC TEST REPORT OF DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C November 8, 2007 Reliability Laboratory of Huawei Technologies Co., Ltd. All Right Reserved Report No.: SYBH(R)164082007EB-1 Page 2, Total 56 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G 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 C2583, R2364, and T256. 6. The test report is invalid if not marked with "exclusive stamp for the test report". 7. Any copy of the test report is invalid if not re-marked with the "exclusive stamp for the test report". 8. 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. 9. The test report is invalid if there is any evidence of erasure and/or falsification. 10. 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. 11. Normally, the test report is only responsible for the samples that have undergone the test. 12. 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. 13. In this page, the “laboratory” is “Reliability Laboratory of Huawei Technologies CO., Ltd. “ Report No.: SYBH(R)164082007EB-1 Page 3, Total 56 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G REPORT ON FCC Test of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C FCC ID: QISRRU3701C-2.5G Report No.: SYBH(R)164082007EB-1 REGULATION 47 CFR Part 2, 47 CFR Part 27 CONCLUSION There are 7 items need to be tested, 7 items have been tested. The sample of the model completely meets the requirements The final judgement is PASSED. General Manager: 2007-11-08 Date Name Signature Technical Responsibility For Area of Testing: 2007-11-08 Date Name Signature Test Lab Engineer: 2007-11-08 Date Name Signature Report No.: SYBH(R)164082007EB-1 Page 4, Total 56 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G Table of Content 1 General Information..................................................................................................................................6 1.1 Test Site........................................................................................................................................6 1.1.1 Test Lab.............................................................................................................................6 1.1.2 State of Accreditation.........................................................................................................6 1.2 Application Information..................................................................................................................6 1.2.1 Details of Applicant............................................................................................................6 1.2.2 Test Period........................................................................................................................6 1.3 Applied Standards.........................................................................................................................7 1.3.1 FCC Rules and Regulations..............................................................................................7 1.3.2 Supporting Standards........................................................................................................7 1.4 Test Items.....................................................................................................................................8 2 Description of the Equipment...................................................................................................................9 2.1 General Description......................................................................................................................9 2.2 Technical Description..................................................................................................................10 2.2.1 Duplex Mode....................................................................................................................10 2.2.2 Access Method................................................................................................................10 2.2.3 Operating Frequency Band..............................................................................................10 2.2.4 Operating Frequency Range............................................................................................10 2.2.5 Transmit Power................................................................................................................10 2.2.6 Modulation and Coding Scheme (MCS) for Downlink (DL)..............................................10 2.2.7 Channel Bandwidth & Channel Spacing..............................................................…

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Report No.: SYBH(R)164082007EB-1 Page 301, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G Channel top: 2685 MHz 99% Ref 13.8 dBmAtt 20 dB * A * EXT *1 PK CLRWR Center2.685 GHzSpan50 MHz5 MHz/ * RBW 100 kHz VBW 300 kHz SWT 8 s * -80 -70 -60 -50 -40 -30 -20 -10 0 10 1 Marker 1 [T1 ] -3.41 dBm 2.688926282 GHz 2 Marker 2 [T1 ] -62.38 dBm 2.660000000 GHz OBW 9.294871795 MHz T1 Temp 1 [T1 OBW] -7.20 dBm 2.680352564 GHz T2 Temp 2 [T1 OBW] -9.14 dBm 2.689647436 GHz Date: 5.OCT.2007 17:41:18 Report No.: SYBH(R)164082007EB-1 Page 302, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G 26 dB Ref 13.8 dBmAtt 20 dB * A * EXT *1 PK CLRWR Center2.685 GHzSpan50 MHz5 MHz/ SWT 8 s * * RBW 100 kHz VBW 300 kHz -80 -70 -60 -50 -40 -30 -20 -10 0 10 1 Marker 1 [T1 ] -3.46 dBm 2.688926282 GHz 2 Marker 2 [T1 ] -63.80 dBm 2.660000000 GHz ndB [T1] 26.00 dB BW 10.416666667 MHz T1 Temp 1 [T1 ndB] -29.83 dBm 2.679791667 GHz T2 Temp 2 [T1 ndB] -29.33 dBm 2.690208333 GHz Date: 5.OCT.2007 17:43:20 Report No.: SYBH(R)164082007EB-1 Page 303, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G Appendix C Band Edge Compliance Report No.: SYBH(R)164082007EB-1 Page 304, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G 1 5 MHz Bandwidth 1.1 2.5 GHz low block 1.1.1 Test Mode of QPSK 1/2 Channel bottom: 2498.5 MHz CLRWR A * RBW 50 kHz 1 RM VBW 500 kHz * SWT 6 s * Att 45 dBRef 51.5 dBm Offset 32.5 dB LVL Center2.4985 GHzSpan10 MHz1 MHz/ -40 -30 -20 -10 0 10 20 30 40 50 1 Marker 1 [T1 ] -15.14 dBm 2.496000000 GHz Date: 6.NOV.2007 11:05:13 1.1.2 Test Mode of QPSK 3/4 Report No.: SYBH(R)164082007EB-1 Page 305, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G Channel bottom: 2498.5 MHz CLRWR A * RBW 50 kHz 1 RM VBW 500 kHz * SWT 6 s * Att 45 dBRef 51.5 dBm Offset 32.5 dB LVL Center2.4985 GHzSpan10 MHz1 MHz/ -40 -30 -20 -10 0 10 20 30 40 50 1 Marker 1 [T1 ] -15.41 dBm 2.496000000 GHz Date: 6.NOV.2007 11:07:17 1.1.3 Test Mode of 16QAM 1/2 Report No.: SYBH(R)164082007EB-1 Page 306, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G Channel bottom: 2498.5 MHz CLRWR A * RBW 50 kHz 1 RM VBW 500 kHz * SWT 6 s * Att 45 dBRef 51.5 dBm Offset 32.5 dB LVL Center2.4985 GHzSpan10 MHz1 MHz/ -40 -30 -20 -10 0 10 20 30 40 50 1 Marker 1 [T1 ] -15.73 dBm 2.496000000 GHz Date: 6.NOV.2007 11:08:18 1.1.4 Test Mode of 16QAM 3/4 Report No.: SYBH(R)164082007EB-1 Page 307, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G Channel bottom: 2498.5 MHz CLRWR A * RBW 50 kHz 1 RM VBW 500 kHz * SWT 6 s * Att 45 dBRef 51.5 dBm Offset 32.5 dB LVL Center2.4985 GHzSpan10 MHz1 MHz/ -40 -30 -20 -10 0 10 20 30 40 50 1 Marker 1 [T1 ] -15.86 dBm 2.496000000 GHz Date: 6.NOV.2007 11:08:37 1.1.5 Test Mode of 64QAM 1/2 Report No.: SYBH(R)164082007EB-1 Page 308, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G Channel bottom: 2498.5 MHz CLRWR A * RBW 50 kHz 1 RM VBW 500 kHz * SWT 6 s * Att 45 dBRef 51.5 dBm Offset 32.5 dB LVL Center2.4985 GHzSpan10 MHz1 MHz/ -40 -30 -20 -10 0 10 20 30 40 50 1 Marker 1 [T1 ] -15.18 dBm 2.496000000 GHz Date: 6.NOV.2007 11:09:30 1.1.6 Test Mode of 64QAM 2/3 Report No.: SYBH(R)164082007EB-1 Page 309, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G Channel bottom: 2498.5 MHz CLRWR A * RBW 50 kHz 1 RM VBW 500 kHz * SWT 6 s * Att 45 dBRef 51.5 dBm Offset 32.5 dB LVL Center2.4985 GHzSpan10 MHz1 MHz/ -40 -30 -20 -10 0 10 20 30 40 50 1 Marker 1 [T1 ] -15.43 dBm 2.496000000 GHz Date: 6.NOV.2007 11:09:41 1.1.7 Test Mode of 64QAM 3/4 Report No.: SYBH(R)164082007EB-1 Page 310, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G Channel bottom: 2498.5 MHz CLRWR A * RBW 50 kHz 1 RM VBW 500 kHz * SWT 6 s * Att 45 dBRef 51.5 dBm Offset 32.5 dB LVL Center2.4985 GHzSpan10 MHz1 MHz/ -40 -30 -20 -10 0 10 20 30 40 50 1 Marker 1 [T1 ] -15.90 dBm 2.496000000 GHz Date: 6.NOV.2007 11:10:31 Report No.: SYBH(R)164082007EB-1 Page 311, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G 1.2 2.5 GHz high block 1.2.1 Test Mode of QPSK 1/2 Channel top: 2687.5 MHz Att 25 dB ** A *1 RM CLRWR * RBW 50 kHz VBW 500 kHz SWT 6 s * Ref 48.6 dBm Offset 33 dB Center2.6875 GHzSpan10 MHz1 MHz/ LVL EXT -50 -40 -30 -20 -10 0 10 20 30 40 1 Marker 1 [T1 ] -16.15 dB m 2.690000000 GHz Date: 2.NOV.2007 15:29:06 1.2.2 Test Mode of QPSK 3/4 Report No.: SYBH(R)164082007EB-1 Page 312, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G Channel top: 2687.5 MHz Att 25 dB ** A *1 RM CLRWR * RBW 50 kHz VBW 500 kHz SWT 6 s * Ref 48.6 dBm Offset 33 dB Center2.6875 GHzSpan10 MHz1 MHz/ LVL EXT -50 -40 -30 -20 -10 0 10 20 30 40 1…

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Report No.: SYBH(R)164082007EB-1 Page 637, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G Appendix F Photos of Test Setup Report No.: SYBH(R)164082007EB-1 Page 638, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G 1 Radiated Spurious Emissions (below 1 GHz) Report No.: SYBH(R)164082007EB-1 Page 639, Total 639 Confidential Information of Huawei. No Distribution without Permission. FCC Test Report of DISTRIBUTED SITE REMOTE RADIO UNIT M/N: RRU3701C, FCC ID: QISRRU3701C-2.5G 2 Radiated Spurious Emissions (above 1 GHz)