RBBN - Ribbon Communications Inc. (RBBN) Q2 2021 Earnings Call Transcript July, 29 2021 08:03 AM Ribbon Communications Inc. Image source: The Motley Fool. Ribbon Communications Inc. (NASDAQ: RBBN) Q2 2021 Earnings Call Jul 28, 2021 , 4:30 p.m. ET Operator Continue reading For further details see: Ribbon Communications Inc. (RBBN) Q2 2021 Earnings Call Transcript