SALT LAKE CITY, UT, ROCHESTER, NY, BOSTON, MA, LONDON, May 29, 2024 (GLOBE NEWSWIRE) -- CallTower, a global leader in delivering unified communications, contact center, and collaboration solutions, including Microsoft Teams, Webex by Cisco, and Zoom, introduces GTx, a game-changing rebiller program designed to revolutionize the transactional landscape for Managed Service Providers (MSPs), System Integrators,…