GTT Communications (formerly Global Telecom and Technology) is a multinational telecommunications and internet provider company. It offers networking services, including software-defined wide-area networking (SD-WAN), multiprotocol label switching (MPLS) and virtual private LAN service (VPLS); transport and infrastructure services, including wavelength, Ethernet, colocation, dark fiber and video transport. The company also provides Internet services, including IP transit, dedicated internet access, and broadband internet; managed services, including managed equipment, security, and hosting; and voice services, including Session Initiation Protocol (SIP) trunking and hosted Private Branch Exchange (PBX). GTT serves financial markets, manufacturing, retail, e-commerce, media and broadcast, and event services industries.