# EDGAR Filing Document

**Accession Number:** 0001708055
**File Stem:** 0001104659-25-065285
**Filing Date:** 2025-7
**Character Count:** 33967
**Document Hash:** 7bc66462b2504086b626de69757454b9
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-065285.hdr.sgml**: 20250702

**ACCESSION NUMBER**: 0001104659-25-065285

**CONFORMED SUBMISSION TYPE**: S-8

**PUBLIC DOCUMENT COUNT**: 5

**FILED AS OF DATE**: 20250702

**DATE AS OF CHANGE**: 20250702

**EFFECTIVENESS DATE**: 20250702

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Ribbon Communications Inc.
- **CENTRAL INDEX KEY:** 0001708055
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-COMPUTER INTEGRATED SYSTEMS DESIGN [7373]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 821669692
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** S-8
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-288488
- **FILM NUMBER:** 251101073

**BUSINESS ADDRESS:**
- **STREET 1:** 6500 CHASE OAKS BOULEVARD
- **CITY:** PLANO
- **STATE:** TX
- **ZIP:** 75023
- **BUSINESS PHONE:** 877-412-8867

**MAIL ADDRESS:**
- **STREET 1:** 6500 CHASE OAKS BOULEVARD
- **CITY:** PLANO
- **STATE:** TX
- **ZIP:** 75023

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Sonus Networks, Inc.
- **DATE OF NAME CHANGE:** 20171027

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Solstice Sapphire Investments, Inc.
- **DATE OF NAME CHANGE:** 20170531

**As filed with the Securities and Exchange Commission on July 2, 2025** 

**Registration No. 333-**

**UNITED STATES<br> SECURITIES AND EXCHANGE COMMISSION<br> WASHINGTON, D.C. 20549**

<br> **FORM S-8**

**REGISTRATION STATEMENT<br> UNDER<br> THE SECURITIES ACT OF 1933**

**RIBBON COMMUNICATIONS INC.** 

(Exact Name of Registrant as Specified in Its Charter)

---

| |
|:---|
| **Delaware** |
| (State or Other Jurisdiction of Incorporation or Organization) |
| **82-1669692** |
| (I.R.S. Employer Identification No.) |
| **6500 Chase Oaks Boulevard, Suite 100**<br> **Plano, Texas** |
| (Address of Principal Executive Offices) |
| **75023** |
| (Zip Code) |

---

**RIBBON COMMUNICATIONS INC. 2025 INCENTIVE AWARD PLAN**<br> (Full Title of the Plan)

**Patrick W. Macken** 

**Executive Vice President, Chief Legal Officer and Corporate Secretary** 

**6500 Chase Oaks Boulevard, Suite 100** 

**Plano, Texas 75023** 

(Name and Address of Agent for Service)

**(978) 614-8100**<br> (Telephone Number, Including Area Code, of Agent for Service)

With a copy to:<br> **David W. Ghegan, Esq.<br> Troutman Pepper Locke LLP** 

**600 Peachtree Street, N.E.** 

**Suite 3000** 

**Atlanta, Georgia 30308** 

**(404) 885-3139**

<br> Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ◻ | Accelerated filer | x |
| Non-accelerated filer | ◻ | Smaller reporting company | ◻ |
|  |  | Emerging growth company | ◻ |

---

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

**Part i**

**information required in the section 10(** **a) PROSPECTUS**

**ITEM 1. PLAN INFORMATION.\***

**ITEM 2. REGISTRANT INFORMATION AND EMPLOYEE PLAN ANNUAL INFORMATION.\***

\* The document(s) containing the information specified in Part I of Form S-8 will be sent or given to participants in the Ribbon Communications Inc. 2025 Incentive Award Plan (the "Plan") pursuant to Rule 428(b)(1) under the Securities Act of 1933, as amended (the "Securities Act"). In accordance with Rule 428 and the requirements of Part I of Form S-8, such documents are not being filed with the Securities and Exchange Commission (the "Commission") either as part of this Registration Statement or as prospectuses or prospectus supplements pursuant to Rule 424 under the Securities Act. Such documents and documents incorporated by reference in this Registration Statement pursuant to Item 3 of Part II of this Form S-8, taken together, constitute a prospectus that meets the requirements of Section 10(a) of the Securities Act.

**Part II**

**INFORMATION REQUIRED IN THE REGISTRATION STATEMENT**

**ITEM 3. INCORPORATION OF DOCUMENTS BY REFERENCE.**

Ribbon Communications Inc. (the "Registrant") hereby incorporates by reference into this Registration Statement the following documents previously filed with the Commission:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) The Registrant's [Annual Report on Form 10-K for the fiscal year ended December 31, 2024, filed with the Commission on February 27, 2025](https://www.sec.gov/ix?doc=/Archives/edgar/data/0001708055/000155837025001773/tmb-20241231x10k.htm) ;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) The information specifically incorporated by reference into the Registrant's Annual Report on Form 10-K for the year ended
December 31, 2024 from its [Definitive Proxy Statement on Schedule 14A, filed with the Commission on April 14, 2025](https://www.sec.gov/ix?doc=/Archives/edgar/data/1708055/000110465925034540/tm252569-3_def14a.htm) ;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) The Registrant's Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2025, filed with the Commission on [April 30, 2025](https://www.sec.gov/ix?doc=/Archives/edgar/data/0001708055/000170805525000003/tmb-20250331x10q.htm) ;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(4) The Registrant's Current Report on Form 8-K filed with the Commission on [May 30, 2025](https://www.sec.gov/ix?doc=/Archives/edgar/data/1708055/000110465925054927/tm2516554d1_8k.htm) ; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(5) The description of the Registrant's Common Stock, contained in [Exhibit 4.1](https://www.sec.gov/Archives/edgar/data/1708055/000155837025001773/tmb-20241231xex4d1.htm) to the [Registrant's Annual Report on Form 10-K for the fiscal year ended December 31, 2024, filed with the Commission on February 27, 2025](https://www.sec.gov/ix?doc=/Archives/edgar/data/0001708055/000155837025001773/tmb-20241231x10k.htm) , which updates the description of
the Registrant's common stock contained in the Registrant's Registration Statement on [Form S-3, filed with the Commission on April 4, 2023](https://www.sec.gov/Archives/edgar/data/1708055/000110465923041613/tm2311172-1_s3.htm) , including any amendment or report filed for the purpose of updating such description.

All documents subsequently filed by the Registrant pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), prior to the filing of a post-effective amendment which indicates that all securities offered hereby have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference into this Registration Statement and to be a part hereof from the date of filing of such documents; provided, however, that documents or information deemed to have been furnished and not filed in accordance with Commission rules shall not be deemed incorporated by reference into this Registration Statement. Any statement contained herein or in a document, all or a portion of which is incorporated or deemed to be incorporated by reference herein, shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or amended, to constitute a part of this Registration Statement.

**ITEM 4. DESCRIPTION OF SECURITIES.**

Not applicable.

**ITEM 5. INTERESTS OF NAMED EXPERTS AND COUNSEL.**

Not applicable.

**ITEM 6. INDEMNIFICATION OF DIRECTORS AND OFFICERS.**

The Company is governed by the General Corporation Law of the State of Delaware, or the DGCL. Section 102 of the DGCL permits a corporation to eliminate the personal liability of directors and certain officers of a corporation to the corporation or its stockholders for monetary damages for a breach of fiduciary duty as a director or applicable officer, except where the director or officer breached his or her duty of loyalty, failed to act in good faith, engaged in intentional misconduct or knowingly violated a law, obtained an improper personal benefit, with respect to directors, authorized the payment of a dividend or approved a stock repurchase in violation of Delaware corporate law or, with respect to officers, an action is by or in the right of the corporation. The Company's Restated Certificate of Incorporation, as amended (the "Certificate of Incorporation"), provides that no director or applicable officer of the Company shall be personally liable to the Company or its stockholders for monetary damages for any breach of fiduciary duty as director, notwithstanding any provision of law imposing such liability, except to the extent that applicable law prohibits the elimination or limitation of liability of directors for breaches of fiduciary duty.

Section 145 of the DGCL provides that a corporation may indemnify any person, including an officer or director, who was or is, or is threatened to be made, a party to any threatened, pending or completed legal action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of such corporation), by reason of the fact that such person was or is an officer, director, employee or agent of such corporation or is or was serving at the request of such corporation as a director, officer, employee or agent of another corporation or enterprise. The indemnity may include expenses (including attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such person in connection with such action, suit or proceeding, provided such officer, director, employee or agent acted in good faith and in a manner such person reasonably believed to be in, or not opposed to, the corporation's best interest and, for criminal proceedings, had no reasonable cause to believe that such person's conduct was unlawful. A Delaware corporation may indemnify any person, including an officer or director, who was or is, or is threatened to be made, a party to any threatened, pending or contemplated action or suit by or in the right of such corporation, under the same conditions, except that such indemnification is limited to expenses (including attorneys' fees) actually and reasonably incurred by such person, and except that no indemnification is permitted without judicial approval if such person is adjudged to be liable to such corporation. Where an officer or director of a corporation is successful, on the merits or otherwise, in the defense of any action, suit or proceeding referred to above, or any claim, issue or matter therein, the corporation must indemnify that person against the expenses (including attorneys' fees) which such officer or director actually and reasonably incurred in connection therewith.

The Certificate of Incorporation provides that the Company's directors and officers are to be indemnified by the Company to the fullest extent permitted by Section 145 of the DGCL, against all expense, liability and loss (including attorneys' fees, judgments, fines, ERISA excise taxes or penalties and amounts paid in settlement) reasonably incurred or suffered by such person in connection with such action, suit or proceeding and any appeal therefrom, and such indemnification shall continue as to an indemnitee who has ceased to be a director, trustee, officer, employee or agent.

The Company's Amended and Restated By-Laws (the "By-Laws") provide that the Company shall indemnify, to the fullest extent permitted by applicable law, as the same exists or may be amended, any person who was or is made a party or is threatened to be made a party to or is otherwise involved in any action, suit or proceeding, whether civil, criminal, administrative or investigative, by reason of being or having been a director or officer of the Company; or while a director or officer of the Company, serving or having served at our request as a director, trustee, officer, employee or agent of another corporation or of a partnership, joint venture, trust or other enterprise, including service with respect to an employee benefit plan, against all expense, liability and loss (including attorneys' fees, judgments, fines, ERISA excise taxes or penalties and amounts paid in settlement) reasonably incurred or suffered by such indemnitee in connection therewith.

The By-Laws further provide that the right to indemnification shall include the right to be paid by the Company the expenses (including attorneys' fees) incurred in defending any such proceeding in advance of its final disposition; provided, however, that, to the extent required by law, such advancement of expenses shall be made only upon our receipt of an undertaking, by or on behalf of such indemnitee, to repay all amounts so advanced if it shall ultimately be determined by final judicial decision from which there is no further right to appeal that such indemnitee is not entitled to be indemnified for such expenses under the By-Laws or otherwise.

The Company may, but is not obligated to, purchase and maintain insurance at its expense on behalf of any such person.

**ITEM 7. EXEMPTION FROM REGISTRATION CLAIMED.**

Not applicable.

**ITEM 8. EXHIBITS.**

---

| | |
|:---|:---|
| **Exhibit Number** | **Description** |
| [4.1](https://www.sec.gov/Archives/edgar/data/1708055/000110465917064455/a17-24632_1ex3d2.htm) | [Restated Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.2 to the Registrant's Current Report on Form 8-K12B, filed October 30, 2017 with the SEC).](https://www.sec.gov/Archives/edgar/data/1708055/000110465917064455/a17-24632_1ex3d2.htm) |
| [4.2](https://www.sec.gov/Archives/edgar/data/1708055/000110465917070729/a17-27586_1ex3d1.htm) | [Certificate of Amendment of the Restated Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K, filed November 28, 2017 with the SEC).](https://www.sec.gov/Archives/edgar/data/1708055/000110465917070729/a17-27586_1ex3d1.htm) |
| [4.3](https://www.sec.gov/Archives/edgar/data/1708055/000110465923087871/tm2322779d1_ex3-1.htm) | [Second Certificate of Amendment to the Restated Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K, filed August 4, 2023 with the SEC).](https://www.sec.gov/Archives/edgar/data/1708055/000110465923087871/tm2322779d1_ex3-1.htm) |
| [4.4](https://www.sec.gov/Archives/edgar/data/1708055/000110465925054927/tm2516554d1_ex3-1.htm) | [Certificate of Amendment to the Registrant's Restated Certificate of Incorporation, effective as of May 29, 2025 (incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K, filed May 30, 2025 with the SEC).](https://www.sec.gov/Archives/edgar/data/1708055/000110465925054927/tm2516554d1_ex3-1.htm) |
| [4.5](https://www.sec.gov/Archives/edgar/data/1708055/000162828018002933/rbbn-ex3320171231.htm) | [Amended and Restated By-Laws of the Registrant (incorporated by reference to Exhibit 3.3 to the Registrant's Annual Report on Form 10-K, filed March 8, 2018 with the SEC).](https://www.sec.gov/Archives/edgar/data/1708055/000162828018002933/rbbn-ex3320171231.htm) |
| [5.1\*](tm2518789d1_ex5-1.htm) | [Opinion of Troutman Pepper Locke LLP.](tm2518789d1_ex5-1.htm) |
| [23.1\*](tm2518789d1_ex23-1.htm) | [Consent of Independent Registered Public Accounting Firm, Deloitte & Touche LLP.](tm2518789d1_ex23-1.htm) |
| [23.2\*](tm2518789d1_ex5-1.htm) | [Consent of Troutman Pepper Locke LLP (included in Exhibit 5.1 hereto).](tm2518789d1_ex5-1.htm) |
| [24.1\*](#a_001) | [Power of Attorney (contained on signature page hereto).](#a_001) |
| [99.1](https://www.sec.gov/Archives/edgar/data/1708055/000110465925034540/tm252569-3_def14a.htm#tAPC) | [Ribbon Communications Inc. 2025 Incentive Award Plan (incorporated by reference to Appendix C to the Registrant's Definitive Proxy Statement filed April 14, 2025 with the SEC).](https://www.sec.gov/Archives/edgar/data/1708055/000110465925034540/tm252569-3_def14a.htm#tAPC) |
| [107.1\*](tm2518789d1_ex-filingfees.htm) | [Filing Fee Table.](tm2518789d1_ex-filingfees.htm) |
| \*Filed Herewith |  |

---

**ITEM 9. UNDERTAKINGS.**

(a) The undersigned Registrant hereby undertakes:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and nay deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20% change in the maximum aggregate offering price set forth in the "Calculation of Filing Fee Tables" or "Calculation of Registration Fee" table, as applicable in the effective registration statement; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement;

*Provided, however*, that:

Paragraphs (a)(1)(i) and (a)(1)(ii) of this section do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the Registration Statement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(b) The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(h) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to applicable law, the Registrant's Articles of Incorporation, as such may be amended from time to time, the Registrant's Bylaws or the Registrant's indemnification agreements or otherwise, the Registrant has been advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

**SIGNATURES**

Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Plano, Texas on July 2, 2025.

---

| | |
|:---|:---|
| **RIBBON COMMUNICATIONS INC.** | **RIBBON COMMUNICATIONS INC.** |
| By: | /s/ Bruce W. McClelland |
|  | Name: Bruce W. McClelland |
|  | Title: President, Chief Executive Officer & Director |

---

**POWER OF ATTORNEY**

KNOWN ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Bruce McClelland and Patrick W. Macken as his or her true and lawful attorneys-in-fact and agents, with full power of substitute, for him or her and in his or her name, place and stead, in any and all capacities to sign this Registration Statement and any and all amendments thereto (including post-effective amendments), and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as they, he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their, his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this registration statement on Form S-8 and Power of Attorney have been signed by the following persons in the capacity and on the dates indicated.

---

| | | |
|:---|:---|:---|
| **Signature** | **Title(s)** | **Date** |
| /s/ Bruce W. McClelland | President, Chief Executive Officer and Director | July 2 2025 |
| Bruce W. McClelland | (Principal Executive Officer) |  |
| /s/ John Townsend | Executive Vice President, Chief Financial Officer | July 2, 2025 |
| John Townsend | (Principal Financial Officer) |  |
| /s/ Eric Marmurek | Senior Vice President and Deputy Chief Financial Officer | July 2, 2025 |
| Eric Marmurek | (Principal Accounting Officer) |  |
| /s/ R. Stewart Ewing, Jr. | Director | July 2, 2025 |
| R. Stewart Ewing, Jr. |  |  |
| /s/ Bruns H. Grayson | Director | July 2, 2025 |
| Bruns H. Grayson |  |  |
| /s/ Beatriz V. Infante | Director | July 2, 2025 |
| Beatriz V. Infante |  |  |
| /s/ Scott Mair | Director | July 2, 2025 |
| Scott Mair |  |  |
| /s/ Shaul Shani | Director | July 2, 2025 |
| Shaul Shani |  |  |
| /s/ Richard W. Smith | Director | July 2, 2025 |
| Richard W. Smith |  |  |
| /s/ Tanya Tamone | Director | July 2, 2025 |
| Tanya Tamone |  |  |

---

## Exhibit 5.1

**Exhibit 5.1**

---

| | |
|:---|:---|
| Troutman Pepper Locke LLP<br> 600 Peachtree Street, N.E., Suite 3000<br> Atlanta, Georgia 30308<br>troutman.com | ![](tm2518789d1_ex5-1img01.jpg) |

---

July 2, 2025

Ribbon Communications Inc.

6500 Chase Oaks Boulevard

Suite 100

Plano, Texas 75023

<u>Registration Statement on Form S-8</u>

Ladies and Gentlemen:

We have acted as counsel to Ribbon Communications Inc., a Delaware corporation (the "Company"), in connection with the filing by the Company of the above-referenced Registration Statement on Form S-8 (as the same may be amended and supplemented, the "Registration Statement") on the date hereof with the United States Securities and Exchange Commission (the "Commission") under the Securities Act of 1933, as amended (the "Securities Act"), whereby 16,180,307 shares (the "Shares") of the Company's common stock, $0.0001 par value per share (the "Common Stock") are registered to be issued in accordance with the Ribbon Communications Inc. 2025 Incentive Award Plan (the "Plan").

This opinion is being furnished in accordance with the requirements of Item 601(b)(5)(i) of Regulation S-K promulgated under the Securities Act.

In connection with our representation of the Company, and as a basis for the opinions hereinafter set forth, we have examined originals, or copies certified or otherwise identified to our satisfaction, of the following documents (hereinafter collectively referred to as the "*<u>Documents</u>*"):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. The Registration Statement and exhibits thereto;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. The Restated Certificate of Incorporation of the Company, as amended and supplemented through the date
hereof (the "Certificate of Incorporation");

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. The Amended and Restated By-Laws of the Company, as amended through the date hereof;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4. Resolutions adopted by the Board of the Company and/or a duly authorized committee thereof with respect
to the offering and issuance of Shares under the Plan and certain related matters (the "Resolutions"), certified by an officer
of the Company as being complete, accurate and in effect;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5. The Plan; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6. Such other documents, records, instruments, and matters as we have deemed necessary or appropriate to
express the opinion set forth below, subject to the assumptions, limitations and qualifications stated herein.

In expressing the opinions set forth below, we have assumed the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. Each individual executing any of the Documents is legally competent to do so.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. Each individual executing any of the Documents on behalf of a party (other than the Company) is duly authorized
to do so.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. All Documents are valid, binding and enforceable on the parties thereto.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4. All Documents submitted to us as originals are authentic. The form and content of all Documents submitted
to us as unexecuted drafts do not differ in any respect relevant to this opinion from the form and content of such Documents as executed
and delivered. All Documents submitted to us as certified, photostatic or electronic copies conform to the original documents. All signatures
on all Documents are genuine. All public records reviewed or relied upon by us or on our behalf are true and complete. The information,
representations, and warranties contained in the Documents we have reviewed are true and complete. There has been no oral or written modification
of or amendment to any of the Documents, and there has been no waiver of any provision of any of the Documents, by action or conduct of
the parties or otherwise.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5. Upon the issuance of any of the Shares, the total number of shares of Common Stock issued and outstanding
will not exceed the total number of shares of Common Stock the Company is then authorized to issue under the Articles of Incorporation.

Based on the foregoing, and in reliance thereon, and subject to the assumptions, comments, qualifications, limitations, exceptions and other matters set forth herein, we are of the opinion that the issuance of the Shares has been duly authorized and, when and to the extent issued and delivered by the Company in accordance with the terms of the Certificate of Incorporation, the Plan, the Registration Statement, and the Resolutions, the Shares will be validly issued, fully paid and nonassessable.

The foregoing opinion is limited to the substantive laws of the State of Delaware, and we do not express any opinion herein concerning any other law. We express no opinion as to compliance with any federal or state securities laws, including the securities laws of the State of Delaware, or as to federal or state laws regarding fraudulent transfers. We assume no obligation to supplement this opinion if any applicable law changes after the date hereof or if we become aware of any fact that might change the opinion expressed herein after the date hereof.

No opinion is rendered as to matters not specifically referred to herein and under no circumstances are you to infer from anything stated or not stated herein any opinion with respect to which such reference is not made.

We hereby consent to the filing of this opinion as an exhibit to the Registration Statement. In giving this consent, we do not hereby admit that we come within the category of persons whose consent is required under Section 7 of the Securities Act, or the rules or regulations of the Commission promulgated thereunder.

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| |
|:---|
| Very truly yours, |
| /s/ Troutman Pepper Locke LLP |
| TROUTMAN PEPPER LOCKE LLP |

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## Exhibit 23.1

**Exhibit 23.1**

**CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM**

We consent to the incorporation by reference in this Registration Statement on Form S-8 of our reports dated February 27, 2025 relating to the financial statements of Ribbon Communications Inc. and the effectiveness of Ribbon Communications Inc.'s internal control over financial reporting, appearing in the Annual Report on Form 10-K of Ribbon Communications Inc. for the year ended December 31, 2024.

/s/ Deloitte & Touche LLP

Dallas, Texas

July 2, 2025

## Ex-Filing

**Exhibit 107.1**

**Calculation of Filing Fee Tables**

**Form S-8**<br> (Form Type)

**Ribbon Communications Inc.**

(Exact Name of Registrant as Specified in its Charter)

**Table 1: Newly Registered Securities**

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| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | **Security Type** | **Security<br> Class<br> Title** | **Fee<br> Calculation<br> Rule** | **Amount<br> Registered** | **Proposed<br> Maximum<br> Offering Price<br> Per Unit** | **Maximum<br> Aggregate<br> Offering Price** | **Fee Rate** | **Amount of<br> Registration Fee** |
| Newly Registered Securities | Newly Registered Securities | Newly Registered Securities | Newly Registered Securities | Newly Registered Securities | Newly Registered Securities | Newly Registered Securities | Newly Registered Securities | Newly Registered Securities |
| 1 | Equity | Common Stock, par value $0.0001 per share | Other | 16180307 | $3.98 | $64397621.86 | 0.0001531 | $9859.28 |
| Total Offering Amounts | Total Offering Amounts | Total Offering Amounts | Total Offering Amounts | Total Offering Amounts | Total Offering Amounts | $64397621.86 |  |  |
| Total Fee Offsets | Total Fee Offsets | Total Fee Offsets | Total Fee Offsets | Total Fee Offsets | Total Fee Offsets |  |  | $0.00 |
| Net Fee Due | Net Fee Due | Net Fee Due | Net Fee Due | Net Fee Due | Net Fee Due |  |  | $9859.28 |

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**Offering Note**

<sup>1</sup> Consists of shares of common stock, par value $0.0001 per share ("Common Stock") of Ribbon Communications Inc. (the "Registrant") reserved for issuance under the Ribbon Communications Inc. 2025 Incentive Award Plan (the "Plan"). Pursuant to Rule 416(a) of the Securities Act of 1933, as amended (the "Securities Act"), this Registration Statement shall also cover any additional Common Shares of the Registrant that become issuable under the Plan by reason of any future share dividend, share split, recapitalization, or similar event or change that increases the number of the Registrant's outstanding Common Shares.

Estimated in accordance with Rule 457(h)(1) under the Securities Act solely for purposes of calculating the registration fee, based on the average of the high and low sales prices for the Common Stock as reported on The Nasdaq Global Select Market on June 27, 2025, or $3.98 (rounded up to the nearest cent).