Prerequisites
You should analyze your legacy data so that you can assign it later to the data fields of the R/3 transfer object. Note that normally only data that also exists in the legacy system can be transferred to the R/3 System and used there. If you want to use the fax functions in the R/3 System, the fax numbers that you want to transfer into the R/3 System should have already been entered in your legacy system.
When analyzing your legacy data, you should consider the following questions:

You can supplement data that does not exist in your legacy system with conversion.
Procedure