The following screenshot is an example of Routing Manipulation Number Translation Rules that can be configured to add a ## prefix to the called number based on the calling and called number.
This configuration identifies intra-state calls by matching all possible calling and called area code (NPA) pair within each state. The configuration file for routing number manipulation rules is a tab delimited text file. The following is an example of the first rows in the routing number manipulation rules file.
This file is too large to be created manually through the web interface. So the NexOSS software includes a script (exportForIntraStateCalls.sql) that builds this routing number configuration file automatically from the LERG data in the NexOSS database.