# Natural Access base services RTC aliases

The following table identifies RTC aliases that are registered by Natural Access base services.

RTC alias registered | Base service | Service events
--- | --- | ---
Connected | NCC | NCCEVN_CALL_CONNECTED
Disconnected | NCC | NCCEVN_CALL_DISCONNECTED
Released | NCC | NCCEVN_CALL_RELEASED
Media_Ready | NCC | NCCEVN_READY_FOR_MEDIA
Media_Not_Ready | NCC | NCCEVN_NOT_READY_FOR_MEDIA