Tarrant County 9-1-1 Wireless Facts

  • Wireless calls are now the dominant source of 9-1-1 calls in Tarrant County
  • Most PSAPs average over 80% wireless on a day to day basis
  • Wireless calls to 9-1-1 are different than traditional landline calls
  • All 9-1-1 calls received at PSAPS are displayed on a map but wireless calls rely heavily on map displays for location information
  • Tarrant County has implemented both Phase I and Phase II wireless technology
    • PSAPS receive the calling party’s number and location of the caller by XY coordinates
    • Wireless locations are usually accurate to within about 50 meters of the callers actual location in Tarrant County
    • Wireless calls route by the location of the tower processing the call and NOT by the location of the caller
    • When networks are busy, wireless calls may route to PSAPs other than the closest PSAP dependingon wireless tower status
    • Wireless calls from unsubscribed phones are passed through to the PSAP

9-1-1 Wireless Calls as a Percentage of Total Calls