Selective Routing
Selective Routing : The capability to route a call to the particular PSAP serving the address associated with the TN making the 911 call. Selective routing is achieved by building TN/ESN translations in the tandem central office. These translations are driven by the E911 data base which assigns the ESN to each telephone number based on the customer's address. Service order activity keeps the E911 data base updated. The E911 data base, in turn, generates recent change to the tandem office (through the SCC or RCMAC) to update the TN/ESN translations in the tandem data base
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