Centrex E9-1-1 Solution27
Centrex gives the appearance of a fully functional MLTS system. The Centrex customer purchases a block, or range, of telephone numbers from the ILEC. Each telephone is connected directly to the Central Office switch instead of an on-site MLTS. Centrex service can include 3- or 4-digit station-to-station dialing, Voice Mail and other customized calling features. The ILEC typically generates and processes the initial creation of 9-1-1 ALI records.
After the initial installation of Centrex telephone service, the telephone (station) can be moved to new locations within the Centrex customer's premises without the awareness or involvement of the ILEC knowing or being involved. Therefore, communicating these changes to the provider of the Centrex 9-1-1 ALI should be the responsibility of the Centrex customer.
Centrex customers can update the location of stations in the PS/ALI database through a service order request, or they can subscribe to a web-based application that permits the customer to access the ILEC database and make the changes themselves.
27 NENA 06-003 at 9.
