 HUNTSVILLE, Ala.--BUSINESS WIRE--ADTRAN, Inc. NASDAQ: ADTN announced today that the Company will release its financial results for the fourth quarter 2021 after market close on Wednesday, February 2, 2022. The Company will conduct a conference call on Thursday, February 3, 2022 to discuss the results for the quarter. What: ADTRAN Earnings Call When: 9:30 a.m. Central Time on Thursday, February 3, 2022 Where: ADTRAN will webcast this conference. To listen, simply visi 