Broadvox is a Carrier's Carrier and Service Provider's Service Provider delivering services ranging from the processing of bulk Carrier VoIP minutes to the turnkey enabling of Hosted Telephony VoIP Services. Broadvox goes against the traditional "Service Provider" grain by even assisting other service providers to build out and launch their own VoIP service infrastructure, either partially or completely.
Level 3 Communications, Inc. provides communications and information services worldwide. It offers Softswitch, a distributed computer system that enables to control and process voice and data calls over an Internet protocol (IP) network. The company’s switched services include long distance origination, transport, and termination services, provided over a combination of a circuit switch and Softswitch technologies; services that terminate toll free calls originated or placed on the traditional telephone network; termination of international voice traffic; managed modem for the dial-up access business; a Voice-over-IP (VoIP) solution to launch IP-based local and long-distance voice to residential and business customers through broadband connection; local inbound service, which terminates traditional telephone network originated calls to Internet Protocol termination points; and enhanced 911 service that enables an emergency services operator to automatically receive information related to a 911 caller's registered address and callback phone number.
ACC Business provides all of its customers' access to the AT&T Network, the largest, most advanced and reliable telecommunications network in the world. The AT&T Worldwide Intelligent Network is constantly enhanced, upgraded and monitored for excellence, so you'll have peace of mind knowing that all of your important calls and data will get through.

Edgewater Networks develops products that ensure the secure and reliable delivery of IP based voice and video for service providers and enterprises. Edgewater's products offer proven network and operational savings from the customer premises to the core of the network. EdgeMarc Series routers provide a VoIP aware NAT/Firewall, VoIP survivability, passive call quality monitoring and powerful but easy-to-use traffic management that ensure high quality voice and video. EdgeConnect managed Power over Ethernet switches provide simplified administration, remote configuration and QoS for converged voice, video and data networks. The EdgeView VoIP Support System offers proactive call quality monitoring (including VoIP MOS), Plug & Dial IP phone configuration, and remote management and monitoring of VoIP endpoints.