DESC: The industry-leading series of Total Access 600 Integrated Access Devices is leading the way in helping carriers implement cost-effective voice/data integration for IP network architectures and VoIP services. These scalable devices provide IP voice signaling, access routing, and integral firewall functionality for cost-effective delivery of Hosted IP Centrex or other IP voice and data services to the customer premises. Carriers can save on backhaul costs by implementing an IP network architecture without having to forklift upgrade existing customer installations. Currently deployed Total Access 600 Series devices are IP-ready and require only a software download for most applications.