Neutral Tandem, Inc., doing business as Inteliquent, provides interconnection and interoperability solutions worldwide. It offers voice, IP transit, and Ethernet telecommunications services primarily on a wholesale basis. The company provides its services using an all-IP network, which enables it to deliver global connectivity for various media, including voice, data, and video. It offers voice services that allow carriers to exchange local and long distance traffic between their networks without using an ILEC tandem or establishing direct connections; IP transit services, which allow Internet traffic to cross or transit between its customers to the Internet; and Ethernet services between various points of presence. The company also hosts unified communication and collaboration applications that operate premise-based phone systems, including voicemail, integrated messaging, video calling, and WebEx integration. It serves competitive carriers, including wireless, wireline, cable, and broadband telephony companies; service providers; and content management firms. As of March 14, 2012, the company operated 120 Ethernet sites; and an IPv6 network. Neutral Tandem, Inc. was incorporated in 2001 and is headquartered in Chicago, Illinois.