Here we would like to draw your attention to SPH5 transaction code in SAP. As we know it is being used in the SAP BC-SRV (Basis Services / Communication Interfaces in Basis) component which is coming under BC module (BASIS).SPH5 is a transaction code used for Define Address Data Areas in SAP.
It comes under the package SPHO.
Transaction SPH5 technical data table
|Purpose||Define Address Data Areas|