Internet Protocol). This work is done in the NCS' lab, formerly referred to as the eXperimental Testbed Environment. The multi-vendor lab is in the process of preparation for interoperability tests with other labs and research groups to validate these new approaches in today's Next Generation Networks (NGNs). Interoperability between NGNs and legacy telephone systems will continue to be an area of high interest and more elaborate studies for the NCS and their Committee of Principals throughout the transition from these legacy systems. Accessibility GETS is accessed through a dialing plan and Personal Identification Number (PIN) card verification system. Using common telephone equipment, the user dials the universal access number 710-627-4387 (710-NCS-GETS). A prompt directs the entry of the user's assigned twelve-digit PIN and the destination telephone number. Once the user is authenticated as valid, the call receives special treatment. When dealing with GETS User Assistance, users may need to provide a registered password of 4 to 9 alphanumeric characters for those cards issued to an individual rather than through stockpile. Effectiveness GETS is designed to provide a 90% call completion rate when call volume is eight times normal capacity. See also Nationwide Wireless Priority Service References External links GETS Web Site Disaster preparedness in the United States United States Department of Homeland Security