GTT Launches Cloud Connected PSTN Service for Cisco Webex Across Its Global Tier 1 IP Network RealWire 2020-12-10 MCLEAN, Va., December 10, 2020 — GTT Communications, Inc. (NYSE: GTT), a leading global cloud networking provider to multinational clients, has announced the launch of its Cloud Connected PSTN service for Cisco Webex Calling. Cloud Connected PSTN provides access to Cloud Webex Calling Service with SIP Trunking from GTT and is delivered with end-to-end assurance on GTT’s global Tier 1 IP backbone. GTT offers enterprises PSTN access for Cisco Webex calling and collaboration on a single global platform by integrating diverse communication capabilities. GTT’s full suite of enterprise communications services support PSTN calling, global termination, DIDs and emergency services. With a simple usage-based calling and single rate card model, the solution is both cost effective and easy to manage.