GTT Communications, Inc. provides cloud networking services to a range of clients. The Company offers a portfolio of global communications services, wide area network (WAN) services; Internet services; managed network and security services, and voice and unified communication services. It provides Layer 2 (Ethernet) and Layer 3 (multiprotocol label switching (MPLS)) WAN solutions for multinational clients. It offers customers with high-bandwidth global Internet connectivity and Internet protocol (IP) transit with availability and packet delivery. The Company offers managed network services, including managed equipment, managed security services and managed remote access. Its Session Initiation Protocol (SIP) Trunking service is an enterprise-built unified communications offering that integrates voice, video and chat onto a single IP connection. As of December 31, 2016, it had provided services to multinational enterprises, carriers and government customers in over 100 countries.