Common Contracts

FORM OF SECOND AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT Among RIBBON COMMUNICATIONS INC. and THE STOCKHOLDERS OF RIBBON COMMUNICATIONS INC. THAT ARE PARTIES HERETO Dated as of August 12, 2022

Registration Rights Agreement • August 16th, 2022 • Ribbon Communications Inc. • Services-computer integrated systems design • Delaware

• Contract Type
  Registration Rights Agreement
• Filed
  August 16th, 2022
• Company
  Ribbon Communications Inc.
• Industry
  Services-computer integrated systems design
• Jurisdiction
  Delaware

This SECOND AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of August 12, 2022, is made by and among (i) Ribbon Communications Inc., a Delaware corporation (the “Company”), (ii) JPMC Heritage Parent LLC, a Delaware limited liability company (“JPMC”), and Heritage PE (OEP) III, L.P., a Cayman Islands exempted limited partnership (together with JPMC, the “OEP Stockholders”), (iii) Swarth Investments Ltd., a company incorporated under the Laws of Guernsey (the “Swarth Stockholder”), (iv) each of the other purchasers (collectively, with the OEP Stockholders and the Swarth Stockholder, the “Purchasers”) party to the Securities Purchase Agreement (as defined below) and (v) any other stockholder who from time to time becomes a party to this Agreement by execution of a joinder agreement in the form of Exhibit A hereto (a “Joinder Agreement”) in accordance with Section 3.07 (collectively, the “Stockholders”).

FIRST AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT among

Registration Rights Agreement • March 3rd, 2020 • Ribbon Communications Inc. • Services-computer integrated systems design • Delaware

• Contract Type
  Registration Rights Agreement
• Filed
  March 3rd, 2020
• Company
  Ribbon Communications Inc.
• Industry
  Services-computer integrated systems design
• Jurisdiction
  Delaware

This AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of March 3, 2020, is made by and among (i) Ribbon Communications Inc., a Delaware corporation (the “Company”), (ii) JPMC Heritage Parent LLC, a Delaware limited liability company (“JPMC”), and Heritage PE (OEP) III, L.P., a Cayman Islands exempted limited partnership (together with JPMC, the “OEP Stockholders”), (iii) ECI Holding (Hungary) KFT, a company incorporated under the Laws of Hungary (the “Swarth Stockholder”), and (iv) any other stockholder who from time to time becomes a party to this Agreement by execution of a joinder agreement in the form of Exhibit A hereto (a “Joinder Agreement”) in accordance with ‎Section 3.07 (collectively, the “Stockholders”).

REGISTRATION RIGHTS AGREEMENT among SONUS NETWORKS, INC. AND THE OEP STOCKHOLDERS Dated as of October 27, 2017

Registration Rights Agreement • October 30th, 2017 • Sonus Networks, Inc. • Services-computer integrated systems design • Delaware

• Contract Type
  Registration Rights Agreement
• Filed
  October 30th, 2017
• Company
  Sonus Networks, Inc.
• Industry
  Services-computer integrated systems design
• Jurisdiction
  Delaware

This REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of October 27, 2017, is by and among Sonus Networks, Inc., a Delaware corporation (the “Company”), Heritage PE (OEP) II, L.P., a Cayman Islands exempted limited partnership (“OEP II”), and Heritage PE (OEP) III, L.P., a Cayman Islands exempted limited partnership (together with OEP II, the “OEP Stockholders”), and any other stockholder who from time to time becomes a party to this Agreement by execution of a joinder agreement in the form of Exhibit A hereto (a “Joinder Agreement”) in accordance with Section 3.07 (collectively, the “Stockholders”).