RBBN - Ribbon Communications Inc. (RBBN) Q4 2021 Earnings Call Transcript February, 16 2022 08:00 PM Ribbon Communications Inc. Image source: The Motley Fool. Ribbon Communications Inc. (NASDAQ: RBBN) Q4 2021 Earnings Call Feb 16, 2022 , 4:30 p.m. ET Operator Continue reading For further details see: Ribbon Communications Inc. (RBBN) Q4 2021 Earnings Call Transcript