YZZGWN7823PLayer 3 Multi-Gigabit Network Switch

Grandstream Networks, Inc. 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Tel: 1-617-5669300 Email: [email protected] CFR 47 §2.911(d)(5)(i) Attestation Letter Attestation Letter Date: 2026-08-20 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: YZZGWN7823P 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: Junwei Wang VP of HW Engineering

Grandstream Networks, Inc. 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Tel: 1-617-5669300 Email: [email protected] CFR 47 §2.911 (d)(5)(ii) Attestation Letter Attestation Letter Date: 2026-08-20 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: YZZGWN7823P 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. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, Signature Contact Person: Junwei Wang VP of HW Engineering

U.S. AGENT LETTER OF ATTESTATION Date: 2026-08-20 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: YZZGWN7823P 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.: +1 617-566-9300 Email: [email protected] Signed by (printed name): Junwei Wang Signature:

Grandstream Networks, Inc. 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Tel: 1-617-5669300 Email: [email protected] QA-FR-170-B 7/29/2014 FCC Authorization Date: 2026-08-20 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 Bay Area Compliance Laboratories Corp. (Shenzhen) 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 Bay Area Compliance Laboratories Corp. (Shenzhen) 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: Junwei Wang VP of HW Engineering

Grandstream Networks, Inc. 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Tel: 1-617-5669300 Email: [email protected] FCC Confidential Authorization Date: 2026-08-20 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: YZZGWN7823P 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 As well as short-term confidential treatment of information accompanying this application for a period of 180 days after grant is issued as outlined below: • Internal Photos • User’s Manual • External Photos • Test Set-up Photos 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: Junwei Wang VP of HW Engineering

Grandstream Networks, Inc. 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Tel: 1-617-5669300 Email: [email protected] Product Power Similarity Declaration Date: 2026-08-20 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 Layer 3 Multi-Gigabit Network Switch, model: GWN7823P, FCC ID: YZZGWN7823P, was tested by Bay Area Compliance Laboratories Corp. (Shenzhen), meanwhile, for our marketing purpose, the GWN7823P will be configured with two 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: Junwei Wang Title: VP of HW Engineering

Bay Area Compliance Laboratories Corp. (Shenzhen) Project No.: 2601V02578E-EM FCC ID LABEL AND LOCATION FCC ID Label FCC ID Label Location Information The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time purchase (Labeling requirements per 2.925)

Note: The information marked # is provided by the applicant, the laboratory is not responsible for its authenticity and this information can affect the validity of the result in the test report. Customer model name, addresses, names, trademarks etc. are included. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. 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 must not be used by the customer to claim product certification, approval, or endorsement by NVLAP or any agency of the U.S. Government. This report may contain data that are not covered by the NVLAP accreditation and are marked with an asterisk “▼”. Bay Area Compliance Laboratories Corp. (Shenzhen) 5F(B-West) , 6F, 7F, the 3rd Phase of Wan Li Industrial Building D, Shihua Rd, FuTian Free Trade Zone, Shenzhen, China Tel: +86-755-33320018 Fax: +86-755-33320008 www.baclcorp.com.cn TR-EM-RF024-2 Page 1 of 36 Version 3.0 TEST REPORT Applicant Name: Grandstream Networks, Inc. Address: 126 Brookline Ave., 3rd Floor Boston, MA 02215, USA Report Number: 2601V02578E-EM-00 FCC ID: YZZGWN7823P Test Standard (s) FCC Part 15, Subpart B (Class A) Sample Description Product Type: Layer 3 Multi-Gigabit Network Switch Model No.: GWN7823P Multiple Model(s) No.: N/A Trade Mark: GRANDSTREAM Date Received: 2026/07/15 Issue Date: 2026/08/21 Test Result: Pass ▲ ▲ In the configuration tested, the EUT complied with the standards above. Prepared and Checked By: Approved By: Joson Xiao Moon Liu EMC Engineer EMC Supervisor Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: 2601V02578E-EM-00 TR-EM-RF024-2 Page 2 of 36 Version 3.0 TABLE OF CONTENTS DOCUMENT REVISION HISTORY ......................................................................................................................... 3 GENERAL INFORMATION ....................................................................................................................................... 4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 4 OBJECTIVE ................................................................................................................................................................... 4 TEST METHODOLOGY .................................................................................................................................................. 4 MEASUREMENT UNCERTAINTY .................................................................................................................................... 4 TEST FACILITY ............................................................................................................................................................. 5 SYSTEM TEST CONFIGURATION .......................................................................................................................... 6 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 6 EUT EXERCISE SOFTWARE ........................................................................................................................................... 6 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 6 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 6 EXTERNAL I/O CABLE .................................................................................................................................................. 7 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 8 SUMMARY OF TEST RESULTS ............................................................................................................................. 10 TEST EQUIPMENT LIST ......................................................................................................................................... 11 FCC §15.107 - AC LINE CONDUCTED EMISSIONS ............................................................................................ 12 APPLICABLE STANDARD ............................................................................................................................................ 12 EUT SETUP ................................................................................................................................................................ 12 EMI TEST RECEIVER SETUP ....................................................................................................................................... 12 TEST PROCEDURE ...................................................................................................................................................... 13 LEVEL & OVER LIMIT CALCULATION ....................................................................................................................... 13 TEST DATA ................................................................................................................................................................ 13 FCC §15.109 - RADIATED EMISSIONS ................................................................................................................. 20 APPLICABLE STANDARD ............................................................................................................................................ 20 EUT SETUP .............................................................................................................................…

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