what a stim would look like within the current embodiment the basic function of the stim is to provide a dynamic session dependent logical mapping of user telephone numbers and extensions to their ip address since the current invention directly addresses communications continuity within a disaster context in accordance with one embodiment it is expected that ip addresses of users of the system will change from session to session in this context a session is defined to be the period of time a user is in the online state factors that create this dynamic are 1 domain name service dns lookups for locating users within an internetwork cannot be relied upon to provide ip address mapping and 2 isps normally implement dhcp or wins services to enable ip address re use thus each time a user connects to the internet through their isp the ip address assigned to their terminal 34 will be different 3 during and post disaster users may have to stay home or be forced to log in from a hotel library a friend 39 s house or other location making sessions temporary in most cases when they log in again say from another location their ip address will be different all the way to the top level domain point 1 above bears closer scrutiny as it represents.