YZZGWN77005-port Unmanaged Gigabit Switch

C5266091_X23_Ed.1 1/1 US AGENT LETTER OF ATTESTATION US Agent: Company Name: Grandstream Networks, Inc. Contact Name: Ning Wei Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Telephone No: +1 617-566-9300 Fax No: N/A Email: [email protected] TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 This letter is to confirm that we have accepted the responsibility to act as US agent representative on behalf of the (Grandstream Networks, Inc.) noted below for all future FCC certification/registrations obtained during the period of this agreement, which ends at the specified date below. As per US agent, we are aware of the requirements involved as outlined in FCC Equipment Authorization Program in their Report and Order FCC 22-84 and the clause § 2.911 Application requirements. Applicant Company name: Grandstream Networks, Inc. Grantee code: YZZ FCC ID: YZZGWN7700 Contact Name: Ning Wei Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Telephone No: +1 617-566-9300 Fax No: N/A Email: [email protected] The Applicant acknowledge the acceptance of its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. Date: 2023/2/8 Applicant’s Name: Grandstream Networks, Inc. US Agent’s Name: Grandstream Networks, Inc. Title: Manager Title: Manager Signature Signature FRN No: 0020352431

C5266091_X24_Ed.1 1/1 “Attestation Statements” TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: Grandstream Networks, Inc. Grantee code: YZZ FCC ID: YZZGWN7700 Contact Name: Ning Wei Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Telephone No: +1 617-566-9300 Fax No: N/A Email: [email protected] i. [Grandstream Networks, Inc.] (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. The applicant must sign this certification. ii. [Grandstream Networks, Inc.] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant [is not] identified on the Covered List as an entity producing “covered” equipment. The applicant must sign this certification. Date: 2023/2/8 Applicant’s Name: Networks, Inc. Title: Manager Signature 1 The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist Ning Wei

C5266091_X8_Ed.1 1/1 Grandstream Networks, Inc. 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Letter of Authorization Company: Grandstream Networks, Inc. Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Model Number: GWN7700 FCC Identifier: YZZGWN7700 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Ning Wei Date: February 6, 2023 Title: Manager Signature of applicant:

C5266091_X10_Ed.1 1/1 Grandstream Networks, Inc. 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: February 6, 2023 Subject: Request for Confidentiality FCC ID: YZZGWN7700 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules (47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality ID Label/Location No No Attestation Statement No No External Photos No Block Diagram Schematics Test Report No No Test Setup Photos No User’s Manual Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) No No SDR Software / Security Info No Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Ning Wei Title: Manager

Page 1 of 5 FCC ID: YZZGWN7700 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com APPENDIX 2 PHOTOS OF EUT CONSTRUCTIONAL DETAILS EUT EXTERNAL PHOTOS EUT Photo EUT Photo Page 2 of 5 FCC ID: YZZGWN7700 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo Page 3 of 5 FCC ID: YZZGWN7700 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo Page 4 of 5 FCC ID: YZZGWN7700 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo(Adapter 1: GQ06-050060-ZU) EUT Photo(Adapter 2: NBS05B050060VU) Page 5 of 5 FCC ID: YZZGWN7700 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo(Adapter 3: F06US0500060A)

Label Label location

Page 1 of 2 FCC ID: YZZGWN7700 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com APPENDIX 2 PHOTOS OF EUT CONSTRUCTIONAL DETAILS EUT INTERNAL PHOTOS EUT Photo EUT Photo Page 2 of 2 FCC ID: YZZGWN7700 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com EUT Photo EUT Photo

Page 1 of 27 Report No.:2301073624EMC-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-EMC-ICES003-V1.2 TEST REPORT Product Name: 5-port Unmanaged Gigabit Switch Trade Mark: GRANDSTREAM Model No. / HVIN: GWN7700 Add. Model No. / HVIN: N/A Report Number: 2301073624EMC-1 Test Standards: FCC 47 CFR Part 15 Subpart B ICES-003 Issue 7 FCC ID: YZZGWN7700 Test Result: PASS Date of Issue: February 10, 2023 Prepared for: Grandstream Networks, Inc. 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Prepared by: Shenzhen UnionTrust Quality and Technology Co., Ltd. Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China TEL: +86-755-2823 0888 FAX: +86-755-2823 0886 Prepared by: Reviewed by: Dylan Zhang Henry Lu Senior Project Engineer Team Leader Approved by: Date: February 10, 2023 Kevin Liang Assistant Manager Page 2 of 27 Report No.:2301073624EMC-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-EMC-ICES003-V1.2 Version Version No. Date Description V1.0 February 10, 2023 Original Page 3 of 27 Report No.:2301073624EMC-1 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] http://www.uttlab.com UTTR-EMC-ICES003-V1.2 CONTENTS 1. GENERAL INFORMATION ....................................................................................................................................... 4 1.1 CLIENT INFORMATION ........................................................................................................................................ 4 1.2 EUT INFORMATION ............................................................................................................................................ 4 1.2.1 GENERAL DESCRIPTION OF EUT ............................................................................................................ 4 1.2.2 DESCRIPTION OF ACCESSORIES .............................................................................................................. 4 1.3 DESCRIPTION OF SUPPORT UNITS ...................................................................................................................... 5 1.4 TEST LOCATION ................................................................................................................................................. 5 1.5 TEST FACILITY ................................................................................................................................................... 5 1.6 DEVIATION FROM STANDARDS ............................................................................................................................ 5 1.7 ABNORMALITIES FROM STANDARD CONDITIONS .................................................................................................. 6 1.8 OTHER INFORMATION REQUESTED BY THE CUSTOMER ........................................................................................ 6 1.9 MEASUREMENT UNCERTAINTY ........................................................................................................................... 6 2. TEST SUMMARY ...................................................................................................................................................... 7 3. EQUIPMENT LIST .................................................................................................................................................... 8 4. TEST CONFIGURATION .......................................................................................................................................... 9 4.1 ENVIRONMENTAL CONDITIONS FOR TESTING ........................................................................................................ 9 4.1.1 NORMAL OR EXTREME TEST CONDITIONS ............................................................................................... 9 4.1.2 RECORD OF NORMAL ENVIRONMENT AND TEST SAMPLE ........................................................................... 9 4.2 TEST MODES ..................................................................................................................................................... 9 4.3 TEST SETUP .................................................................................................................................................... 10 4.3.1 FOR RADIATED EMISSIONS TEST SETUP ................................................................................................ 10 4.3.2 FOR CONDUCTED EMISSIONS TEST SETUP ............................................................................................ 11 4.4 SYSTEM TEST CONFIGURATION ........................................................................................................................ 11 5. REFERENCE DOCUMENTS FOR TESTING ......................................................................................................... 12 6. EMC REQUIREMENTS SPECIFICATION .............................................................................................................. 12 6.1 RADIATED EMISSION ........................................................................................................................................ 12 6.2 CONDUCTED EMISSION .................................................................................................................................... 20 APPE…

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Page 1 of 2 FCC ID: YZZGWN7700 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com APPENDIX 1 PHOTOS OF TEST SETUP Radiated emission Test Setup-1 (30 MHz~1 GHz) Page 2 of 2 FCC ID: YZZGWN7700 Shenzhen UnionTrust Quality and Technology Co., Ltd. Address: Unit D/E of 9/F and 16/F, Block A, Building 6, Baoneng science and technology park, Longhua district, Shenzhen, China Tel: +86-755-28230888 Fax: +86-755-28230886 E-mail: [email protected] Http://www.uttlab.com Conducted Emission Test Setup-2