YZZGWN7812PEnterprise Layer 3 Managed Network Switch

Grandstream Networks, Inc. Address: 126 Brookline Ave, 3rd Floor Boston, MA 02215, USA Tel: 1-617-5669300; Fax: 1-617-2491987 Email: [email protected] Product Power Similarity Declaration Date: 2023/04/03 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir/Madam, We, Grandstream Networks, Inc., hereby declare that we have a product named as Enterprise Layer 3 Managed Network Switch, FCC ID:YZZGWN7812P (model: GWN7812P) was tested by China Certification ICT Co., Ltd (Dongguan), meanwhile, for our marketing purpose, the GWN7812P will be configured with three different power modules, the other is the same. We confirm that all information above is true, and we’ll be responsible for all the consequences. Please contact me if you have any question. Sincerely Yours, Signature: Ning Wei Manager

Grandstream Networks, Inc. 126 Brookline Ave, 3rd Floor Boston, MA 02215, USA Tel: 1-617-5669300 Fax: 1-617-2491987 Email: [email protected] CFR 47 §2.911(d)(5)(i) Attestation Letter Attestation Letter Date: 2023/04/06 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(i) Filing FCC ID: YZZGWN7812P Grandstream Networks, Inc. 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. Sincerely, Signature Contact Person: Ning Wei Title:Manager Company Name & Address: Grandstream Networks, Inc. &126 Brookline Ave, 3rd Floor Boston, MA 02215, USA

Grandstream Networks, Inc. 126 Brookline Ave, 3rd Floor Boston, MA 02215, USA Tel: 1-617-5669300 Fax: 1-617-2491987 Email: [email protected] CFR 47 §2.911 (d)(5)(ii) Attestation Letter Attestation Letter Date: 2023/04/06 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(ii) Filing FCC ID: YZZGWN7812P Grandstream Networks, Inc. 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. Sincerely, Signature Contact Person: Ning Wei Title:Manager Company Name & Address: Grandstream Networks, Inc.&126 Brookline Ave, 3rd Floor Boston, MA 02215, USA

U.S. AGENT LETTER OF ATTESTATION Date: 2023-04-06 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(7) Filing FCC ID: YZZGWN7812P Grandstream Networks, Inc. certifies that, as of the date of the filing of the application, Grandstream Networks, Inc. is our designated U.S. agent for service of process for the above referenced FCC ID. Grandstream Networks, Inc. accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Grandstream Networks, Inc. accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent and Applicant Information: Name: Grandstream Networks, Inc. Address: 126 Brookline Ave, 3rd Floor Boston, MA 02215, USA FRN: 0020352431 Tel.: 1-617-5669300 Email: [email protected] Signed by (printed name): Ning Wei Signature:

Grandstream Networks, Inc. 126 Brookline Ave, 3rd Floor Boston, MA 02215, USA Tel: 1-617-5669300 Fax: 1-617-2491987 Email: [email protected] QA-FR-170-B 7/29/2014 FCC Authorization Date: 2023-04-06 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We Grandstream Networks, Inc., the undersigned, hereby authorizes China Certification ICT Co., Ltd (Dongguan) to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by China Certification ICT Co., Ltd (Dongguan) on our behalf shall have the same effect as our own action. 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. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Signature: Ning Wei Manager

Grandstream Networks, Inc. 126 Brookline Ave, 3rd Floor Boston, MA 02215, USA Tel: 1-617-5669300 Fax: 1-617-2491987 Email: [email protected] FCC Confidential Authorization Date: 2023-04-06 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: YZZGWN7812P In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, Grandstream Networks, Inc. hereby requests long-term confidential treatment of information accompanying this application as outlined below:  Block Diagram  Schematics  Operation Description  Parts List The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely Yours, Signature: Ning Wei Manager

EXHIBIT B - EUT EXTERNAL PHOTOGRAPHS port port port

3 3-R1 36.00mm 100.00mm Model: GWN7812PINPUT: 100-240V~ 50-60Hz 4A This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. FCC ID:YZZGWN7812PCAN ICES-003(A) / NMB-003(A)Made in China S/N XXXXXXXXXXXXXXXX MAC XXXXXXXXXXXX Password: XXXXXXXX P/N XXX-XXXXX-XXXXX www.grandstream.com Grandstream Networks, lnc. 126 Brookline Avenue, 3rd Floor Boston, MA 02215, USA

EXHIBIT C - EUT INTERNAL PHOTOGRAPHS chip chip chip chip chip Power #1: RB260W04 Power #2: UES267-SPA-M2-OP Power #3: G0591

TEST REPORT Applicant: Grandstream Networks, Inc. Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA FCC ID: YZZGWN7812P Product Name: Enterprise Layer 3 Managed Network Switch Model Number: GWN7812P Standard(s): 47 CFR Part 15 Subpart B ANSI C63.4-2014 The above equipment has been tested and found compliant with the requirement of the relative standards by China Certification ICT Co., Ltd (Dongguan) Report Number: CR230311135-00A Date Of Issue: 2023/4/6 Reviewed By: Sun Zhong Title: Manager Test Laboratory: China Certification ICT Co., Ltd (Dongguan) No. 113, Pingkang Road, Dalang Town, Dongguan, Guangdong, China Tel: +86-769-82016888 China Certification ICT Co., Ltd (Dongguan) Report No.: CR230311135-00A Page 2 of 33 Test Facility The Test site used by China Certification ICT Co., Ltd (Dongguan) to collect test data is located on the No. 113, Pingkang Road, Dalang Town, Dongguan, Guangdong, China. The lab has been recognized as the FCC accredited lab under the KDB 974614 D01 and is listed in the FCC Public Access Link (PAL) database, FCC Registration No. : 442868, the FCC Designation No. : CN1314. The lab has been recognized by Innovation, Science and Economic Development Canada to test to Canadian radio equipment requirements, the CAB identifier: CN0123. Declarations China Certification ICT Co., Ltd (Dongguan) is not responsible for the authenticity of any test data provided by the applicant. Data included from the applicant that may affect test results are marked with a triangle symbol “▲”. Customer model name, addresses, names, trademarks etc. are not considered data. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report cannot be reproduced except in full, without prior written approval of the Company. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. This report may contain data that are not covered by the accreditation scope and shall be marked with an asterisk “★”. China Certification ICT Co., Ltd (Dongguan) Report No.: CR230311135-00A Page 3 of 33 CONTENTS TEST FACILITY ............................................................................................................................................................. 2 DECLARATIONS ............................................................................................................................................................ 2 DOCUMENT REVISION HISTORY ......................................................................................................................... 4 1. GENERAL INFORMATION ................................................................................................................................... 5 1.1 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ............................................................................... 5 1.2 DESCRIPTION OF TEST CONFIGURATION ................................................................................................................ 6 1.2.2 Support Equipment List and Details .............................................................................................................. 6 1.2.3 Support Cable List and Details ...................................................................................................................... 6 1.2.4 Block Diagram of Test Setup ......................................................................................................................... 7 1.3 MEASUREMENT UNCERTAINTY .............................................................................................................................. 8 2. SUMMARY OF TEST RESULTS ........................................................................................................................... 9 3. REQUIREMENTS AND TEST PROCEDURES ................................................................................................. 10 3.1 AC LINE CONDUCTED EMISSIONS ........................................................................................................................ 10 3.1.1 EUT Setup.................................................................................................................................................... 10 3.1.2 EMI Test Receiver Setup ............................................................................................................................. 10 3.1.3 Test Procedure ............................................................................................................................................. 11 3.1.4 Corrected Amplitude & Margin Calculation ................................................................................................ 11 3.2 RADIATION SPURIOUS EMISSIONS ........................................................................................................................ 12 3.2.1 EUT Setup.................................................................................................................................................... 12 3.2.2 EMI Test Receiver Setup ............................................................................................................................. 13 3.2.3 Test Procedure ............................................................................................................................................. 13 3.2.4 Corrected Amplitude & Margin Calculation ................................................................................................ 13 4. TEST DATA AND RESULTS ................................................................................................................................ 14 4.1 AC LINE CONDUCTED EMISSIONS ........................................................................................................................ 14 4.2 RADIATION SPURIOUS EMISSIONS ........................................…

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EXHIBIT D - TEST SETUP PHOTOGRAPHS Conducted Emissions Front View Conducted Emissions Side View Radiated Emissions Below 1G front View Radiated Emissions Below 1G Rear View Radiated Emissions Above 1G front View Radiated Emissions Above 1G Rear View