Here we would like to draw your attention to SADC 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).SADC is a transaction code used for (Obsolete) Communication Types in SAP.
It comes under the package SZA.
Transaction SADC technical data table
|Purpose||(Obsolete) Communication Types|