PSALIforFacilities-BasedCLECs.doc

PS/ALI for Facilities-Based CLECs Access to Emergency Services (911/E911) Page  PAGE 8 of  NUMPAGES 8 Last Updated November 2011 PS/ALI for Facilities-Based CLECs DESCRIPTION Private Switch/Automatic Location Identification (PS/ALI) is an additional capability of E911 emergency response systems that provides end-users that have a private telephone switch, such as Private Branch Exchange (PBX), Integrated Services Digital Network Primary Rate Interface (ISDN PRI), or some Centrex/Centron systems, with the Selective Routing (SR) and/or ALI feature(s) of E911 for individual telephone stations served by the private switch. This additional capability allows the private switch to identify individual subscriber address and location information to the Public Safety Answering Point (PSAP) operator. PS/ALI service is offered separately from E911 services. PS/ALI is available through FCC Tariff #1 and the respective state access tariff only. The elements associated with PS/ALI are: Transport Feature functionality including SR and ALI 911 calls must be delivered to the 911 SR either through separate Emergency Service (ES) trunks (also referred to as Centralized Automatic Message Accounting (CAMA)) or primary rate ISDN as described in “Network Disclosure 489”. SR and ALI are defined as follows: Selective Routing (SR) – allows 911 calls to route to a designated PSAP on the basis of the Automatic Number Identification (ANI) number of the station used to place the call. Calls from different stations within the same prefix could route to different PSAPs. Automatic Location Identification (ALI) – identifies and forwards the end-user’s address and location (and related information) to the PSAP for display on their consoles. Your end-user’s private switch PBX/Centrex/Centron system will be viewed as a serving wire center/central office within the E911 network. The ANI information generated by the private switch will be read, processed, and utilized as if it were a