United States securities and exchange commission logo September 21, 2022 Bruce McClelland President and Chief Executive Officer Ribbon Communications Inc. 6500 Chase Oaks Boulevard, Suite 100 Plano, Texas 75023 Re: Ribbon Communications Inc. Registration Statement on Form S-3 Filed September 14, 2022 File No. 333-267415 Dear Mr. McClelland: This is to advise you that we have not reviewed and will not review your registration statement. Please refer to Rules 460 and 461 regarding requests for acceleration. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. Please contact Kathleen Krebs, Special Counsel, at 202-551-3350 or Joshua Shainess, Legal Branch Chief, at 202-551-7951 with any questions. Sincerely, Division of Corporation Finance Office of Technology cc: Betty Linkenauger Segaar, Esq.