The Verizon adapter (VerizonAdapter) requires the same History-Info to Diversion adaptations that the Cisco Adapter uses. The Verizon Adapter also performs all the conversions available by the Digit Conversion Adapter.

Verizon egress adapter inserts a special Screened Telephone Number (STN) into the Diversion header of all outgoing calls which utilize Verizon as the Service Provider.

This enables Verizon to identify the physical location of the endpoint that is being used to make an outgoing call and to create the needed billing or tariff data as well as to provide the proper routing of E911 emergency calls.

This feature is called the Verizon Unscreened ANI feature.