Avaya's Product Line Manager for Emergency Services, Mark J. Fletcher, ENP reviews the process for a typical E911 deployment in a corporate Enterprise. In Part 4 we discuss the LIS functionality in greater detail as well as define some basic requirements of the LIS and OSN Notification Services that should be included inthe RFP for E911 remediation, as well as ensuring the smooth transition to NG911 without a forklift in the future.