[Asterisk-Dev] Database backed Asterisk

[Jens Kübler]

Basically RealTime is a higher abstraction layer.

ast_data is pretty static when in comes to new config features or deprecated 
ones as the sql stuff is hard coded.

realtime uses a more dynamic approach as the sql queries are constructed as 
needed according to the currently supported features.

So realtime is the next logical step after ast_data but for a lot of people 
ast_data still fits their needs for serveral reasons.

Jens