Ribbon Communications to Report Third Quarter 2021 Financial Results on October 27, 2021

Ribbon Communications Inc. (Nasdaq: RBBN), a global provider of real time communications software and IP optical transport solutions to service providers, enterprises, and critical infrastructure sectors, today announced that it will report financial results for the third quarter of 2021 after the close of the market on Wednesday, October 27, 2021. Following the release, Ribbon Communications will host a conference call with the financial community at 4:30 p.m. ET to discuss the results.

The Company will offer a live, listen-only webcast of the conference call via the investor section of its website at investors.ribboncommunications.com, where a replay will also be available shortly following the conference call.