RBBN ▲ +2.6% - Ribbon Communications Inc. $RBBN RBBN - Ribbon and TNS Simplify Legacy Voice Switch Replacement Ribbon Communications rose 2.6% following an announcement that the company and TNS are simplifying the process for replacing legacy voice switches. The streamlined replacement solution could expand Ribbon's addressable market among telecommunications providers looking to modernize their infrastructure. 09-SEP-2026 11:00 AM ET