VinTALK's redundant Class IV IP-PBX call platform is located at a state-of-the-art colocation facility in San Diego, California which houses VinTALK's switching equipment and network interconnections to deliver high quality voice services. The network infrastructure includes connections to customer T-1 lines, voice switches to process calls between VinTALK customers and other networks, and interconnections to the public telephone and internet networks. Key infrastructure at the data center provides redundancy of power, air conditioning, call platform servers, internet providers, switches, and equipment to ensure 99.999% uptime.