Exhibit 3.1

Amendment to Second Amended and Restated By-Laws

The Second Amended and Restated By-Laws of Sonus Networks, Inc. are hereby amended by adding thereto the following provision as a new Section 6.5 thereof:

“6.5        Exclusive Forum. Unless the corporation consents in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware shall, to the fullest extent permitted by law, be the sole and exclusive forum for: (a) any derivative action or proceeding brought on behalf of the corporation, (b) any action asserting a claim of breach of a fiduciary duty owed by any current or former director, officer, other employee, agent or stockholder of the corporation to the corporation or the corporation’s stockholders, including, without limitation, a claim alleging the aiding and abetting of such a breach of fiduciary duty, (c) any action asserting a claim arising pursuant to any provision of the General Corporation Law of the State of Delaware, the Company’s Certificate of or these by-laws (as each may be amended from time to time) or as to which the General Corporation Law of the State of Delaware confers jurisdiction on the Court of Chancery of the State of Delaware, or (d) any action asserting a claim governed by the internal affairs doctrine or other “internal corporate claim” as that term is defined in Section 115 of the General Corporation Law of the State of Delaware.  Any person or entity purchasing or otherwise acquiring or holding any interest in shares of capital stock of the corporation shall be deemed to have notice of and consented to the provisions of this Section 6.5.”

Adopted by the Board of Directors of Sonus Networks, Inc. on May 22, 2017.