Back up customer phone button configuration

I would like to have a way to see the client previous button layout. It is to easy to deploy a button template to the wrong phone. There needs to be a way that the button config can be restored or retreived from a config file. It would be nice to have an automatic process but a Config file that can be downloaded would also be nice. I know the older NEC systems and the IPC Unigy system have these features.