# Repeat dial functions

Function | Synchronous/ Asynchronous | Description
--- | --- | ---
rdaAttach | Asynchronous | Attaches the repeat dial library to NCC.
rdaDetach | Asynchronous | Detaches the repeat dial library from NCC.
rdaLogCall | Asynchronous | Logs a call attempt into the repeat dial database.
rdaRequestCall | Asynchronous | Queries the repeat dial database to determine if another call to a given address can be attempted.