YZZGWN7671Wall-Mounted Dual-Band Wi-Fi 7 Access Point

Applicant Declaration QSF27-14-04 Rev 1.4 April 25, 2025 Page 1 of 1 Original Issue: Jan. 4, 2021 SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia 30024 United States Applicant Legal Business Name Grandstream Networks, Inc. Address 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA FRN 0020352431 Grantee Code YZZ FCC ID: YZZGWN7671 Authorized Contact Name Junwei Wang Contact Phone 1 617-566-9300 Contact Email [email protected] I, the undersigned, certify that I am an authorized signatory for the Applicant and therefore declare; a) in accordance with 47CFR2.911(d), all of the statements herein and the exhibits attached hereto are true and correct to the best of my knowledge and belief. b) in accepting a Grant of Equipment Authorization issued by a TCB, under the authority of the FCC, as a result of the representations made in this application, the Applicant is responsible for: (1) labeling the equipment with the exact FCC ID as specified in this application, (2) compliance statement labeling pursuant to the applicable rules, (3) compliance of the equipment with the applicable technical rules, c) if the Applicant is not the actual manufacturer of the equipment, appropriate arrangements have been made with the manufacturer to ensure that production units of this equipment will continue to comply with the FCC’s technical requirements. d) in accordance with 47 CFR 2.909 and KDB394321, the Applicant has read, understood and agrees to accept that they are the responsible party and agree to abide by their responsibilities as specified under 47 CFR 2.909 and KDB394321. e) in accordance with ISO 17065, FCC KDB641163, FCC KDB610077, KDB394321 and RSP-100, the Applicant has read, understood, accepts and agrees to abide by the post market surveillance requirements. (1) the Applicant understands, accepts and agrees that a sample may be requested for surveillance testing. (2) the Applicant shall make provisions to always have a production sample available upon request by SGS, FCC and/or ISED. (3) the Applicant shall, upon request by SGS, at the Applicant’s expense, provide a production sample of the requested product to SGS, FCC and/or ISED as instructed. The sample shall include all support devices, cables, software, accessories or other hardware or software required for evaluation, review, certification and audit surveillance of products certified by SGS. f) neither the Applicant nor any party to the application is subject to a denial of Federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862 because of a conviction for possession or distribution of a controlled substance. See 47CFR 1.2002(b) for the definition of a “party” for these purposes. g) the Applicant has read, understood, accepts and agrees to abide by the SGS North America, Inc. terms and conditions as specified in the TCB Application Form 731 (QSF27-14-01). Link to CFRs: https://www.fcc.gov/wireless/bureau-divisions/technologies-systems-and-innovation-division/rules-regulations-title-47 Link to KDBs: https://apps.fcc.gov/oetcf/kdb/index.cfm Link to RSP-100: https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf01130.html Link to the Covered List: Covered List Applicant Signature: Date: 2026-03-06 Print Name: Junwei Wang Title: VP of HW Engineering *NOTE: This declaration cannot be signed by an Agent, it shall be signed by an authorized person listed in the FCC database

FCC COVERED LIST DECLARATION LETTER Page 1 of 1 Revision 1.0 SGS North America Inc. 620 Old Peachtree Road SUITE 100 Suwanee, Georgia 30024 United States Applicant Legal Business Name Grandstream Networks, Inc. Address 126 Brookline Ave., 3rd Floor,Boston,Massachusetts, 02215 USA United States FRN 0020352431 Grantee Code YZZ FCC ID: YZZGWN7671 Authorized Contact Name Junwei Wang Contact Phone 1 617-566-9300 Contact Email [email protected] We certifies: - 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. - as of the date of the filing of the application, the applicant [is not] identified on the Covered list, established pursuant to §1.50002, as an entity producing “covered” equipment. - the software to be loaded prior to marketing of the equipment identified above is not “covered” software manufactured by any entity including predecessors, successors, parents, subsidiaries, affiliates or any entity which has rebranded or relabeled the software produced by the entity(ies) identified on the “Covered List”. - the device is not capable of storing or running software listed on the covered list and therefore is inherently compliant. NOTE: Justification/evidence explaining how compliance is met must accompany this letter Link to the Covered List: Covered List Applicant Signature: Date: 2026-03-06 Print Name: Junwei Wang Title: VP of HW Engineering *NOTE: This declaration cannot be signed by an Agent, it shall be signed by an authorized person listed in the FCC database

UNITED STATES DESIGNATED AGENT LETTER Date: 2026-03-06 TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Applicant U.S. designated agent Company Name: Grandstream Networks, Inc. Company Name: Grandstream Networks, Inc. Grantee Code: YZZ FRN: 0020352431 Contact Name: Junwei Wang Contact Name: Junwei Wang Address: 126 Brookline Ave., 3rd Floor Address: 126 Brookline Ave., 3rd Floor City/Province/Zip: Boston/Massachusetts City/Province/Zip: Boston/Massachusetts Telephone: 1 617-566-9300 Telephone: 1 617-566-9300 Fax: N/A Fax: N/A Email: [email protected] Email: [email protected] ATTN: Director of Certification: We, Grandstream Networks, Inc. understand and acknowledge the applicants consent and the designated agent’s obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and e-mail of the designated agent listed above. We, Grandstream Networks, Inc. acknowledge the applicant’s 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. Print Name: Junwei Wang Title: VP of HW Engineering Signature: On behalf of Company: Grandstream Networks, Inc. Telephone: 1 617-566-9300 E-mail: [email protected]

Grandstream Networks, Inc. Date: 2026-03-06 Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Regarding: FCC ID: YZZGWN7671 To whom it may concern: We, the undersigned, hereby authorize SGS-CSTC Standards Technical Services Co., Ltd. (SGS) to act on our behalf in all manners relating to application for equipment authorization with respect to the FCC ID above, including signing of all documents relating to these matters. Any and all acts carried out by the agent on our behalf shall have the same effect as acts of our own. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). Where our agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for Certification, as specified by SGS North America, Inc., still resides with Grandstream Networks, Inc. This authorization is valid until further written notice from the applicant. Print Name: Junwei Wang Title: VP of HW Engineering Signature: On behalf of Company: Grandstream Networks, Inc. Telephone: 1 617-566-9300 E-mail: [email protected]

Grandstream Networks, Inc. TO: Federal Communication Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MID 21046 Regarding: Confidentiality Request regarding application for FCC ID: YZZGWN7671 LONG TERM CONFIDENTIALITY Pursuant to 47 CFR Section 0.459 and 0.457 of the commission’s rules, the applicant hereby request confidential treatment of the documents listed below, associated with the certification application referenced above. Schematic(s) Block Diagrams Operational Descriptions Software Security Description The documents above contain proprietary information not released to the public. Public disclosure of this information may prove harmful to the business of the applicant. SHORT TERM CONFIDENTIALITY Additionally, the applicant requests the following documents be held confidential until the device is marketed or 180 days from the grant date, whichever is less. If the device is marketed within aforementioned days of the Grant Date, the applicant will notify the TCB per FCC KDB 726920 D01 Confidentiality Request Procedures. External Photos Internal Photos Test Setup Photos User manual(s) Sincerely, Print Name: Junwei Wang Title: VP of HW Engineering Signature: On behalf of Company: Grandstream Networks, Inc. Telephone: 1 617-566-9300 E-mail: [email protected]

Page 1 of 1 Professional Installation Attestation We, Declare that the following product is a professionally installed device. Product: Wall-Mounted Dual-Band Wi-Fi 7 Access Point FCC ID: YZZGWN7671 Model: GWN7671 Brand: Grandstream The reasons are as follows: 1. This device is intended for industrial or commercial use. 2. This device is sold to agents or distributors. 3. This product installation requires training. Technical support team will provide professional training to agents or dealers, including but not limited to product power supply, product installation, product deployment, product management, configuration, etc. 4. This product needs to be professionally configured before use. Sincerely, Print Name: Junwei Wang Title: VP of HW Engineering Signature: On behalf of Company: Grandstream Networks, Inc. Telephone: 1 617-566-9300 E-mail: [email protected]

林基加 孙彰宝 林基加 GWN7671FCC贴纸 设计人 制图人 审核人 比例 型号类型 料号 V1.0 1：1 版本 20251208 日期 1/1 页数 282-01233-00A-01 版本号变更记录日期 V1.0原始版本20250624 技术要求： 1. 尺寸：48*28mm，四周倒角R=1mm，C=5mm，厚度0.1±0.05mm； 2. 公差：±0.2mm； 3. 材质：消银龙背压花胶，表面过哑膜。要求高温70°C，高湿90%， 低温-25°C，时间各8小时环境下不脱落不翘起不起泡； 4. 颜色：Pantone Black 7 C 5. 量产前需样品承认。 R1 48.00 mm 28.00 mm 5 Label Location Label 1

SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR260300075301 Page: 1 of 23 Keny Xu EMC Laboratory Manager TEST REPORT Application No.: SZCR2603000753TL Applicant: Grandstream Networks, Inc. Address of Applicant: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Manufacturer: Grandstream Networks, Inc. Address of Manufacturer: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Equipment Under Test (EUT): EUT Name: Wall-Mounted Dual-Band Wi-Fi 7 Access Point Model No.: GWN7671 Trade Mark: FCC ID: GRANDSTREAM YZZGWN7671 Standard(s) : 47 CFR Part 15, Subpart B Date of Receipt: 2026-03-02 Date of Test: 2026-03-05 to 2026-03-09 Date of Issue: 2026-04-28 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR260300075301 Page: 2 of 23 Revision Record Version Chapter Date Modifier Remark 01 2026-04-28 Original Authorized for issue by: Byron Liang/Project Engineer Eric Fu/Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR260300075301 Page: 3 of 23 2 Test Summary Emission Part Item Standard Method Requirement Result Conducted Emissions at Mains Terminals (150kHz-30MHz) 47 CFR Part 15, Subpart B ANSI C63.4-2014 15.107(a);Class B Pass Radiated Emissions (30MHz-1GHz) ANSI C63.4-2014 15.109(a);Class B Pass Radiated Emissions (Above 1GHz) ANSI C63.4-2014 15.109(g);Class B Pass SGS-CSTC Standards Technical Services Co., Ltd. Shenzhen Branch SZEMC-TRF-01 Rev. A/2 Report No.: SZCR260300075301 Page: 4 of 23 3 Contents Page 1 Cover Page ................................................................................................................................................ 1 2 Test Summary ........................................................................................................................................... 3 3 Contents .................................................................................................................................................... 4 4 General Information .................................................................................................................................. 5 4.1 Details of E.U.T. ................................................................................................................................. 5 4.2 Description of Support Units .............................................................................................................. 5 4.3 Measurement Uncertainty .................................................................................................................. 5 4.4 Test Location ...................................................................................................................................... 6 4.5 Test Facility ........................................................................................................................................ 6 4.6 Deviation from Standards ................................................................................................................... 6 4.7 Abnormalities from Standard Conditions ........................................................................................... 6 5 Equipment List .......................................................................................................................................... 7 6 Emission Test Results ............................................................................................................................. 9 6.1 Conducted Emissions at Mains Terminals (150kHz-30MHz) ............................................................ 9 6.1.1 E.U.T. Operation ............................................................................................................................ 9 6.1.2 Test Mode Description ................................................................................................................... 9 6.1.3 Test Setup Diagram ....................................................................................................................... 9 6.1.4 Measurement Procedure and Data............................................................................................. 10 6.2 Radiated Emissions (30MHz-1GHz) ................................................................................................ 13 6.2.1 E.U.T. Operation .......................................................................................................................... 13 6.2.2 Test Mode Description ................................................................................................................. 13 6.2.3 Test Setup Diagram ..................................................................................................................... 14 6.2.4 Measurement Procedure and Data............................................................................................. 14 6.3 Radiated Emissions (Above 1GHz).................................................................................................. 17 6.3.1 E.U.T. Operation .......................................................................................................................... 17 6.3.2 Test Mode Description ................................................................................................................. 17 6.3.3 Test Setup Diagram ..................................................................................................................... 17 6.3.4 Measurement Procedure and Data............................................................................................. 18 7 Test Setup Photo .................................................................................................................................... 21 8 EUT Constructional Details (EUT Photos) ......…

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