Solution : https://service.sap.com/sap/support/notes/175293 (SAP Service marketplace login required)
Key words : 
additional key words hr-pdc, key word 'time & attendance', hr-pdc interface description, supports multiple-client capability, hr-pdc interface, multiple-client capability, multiple-client capable, multible client capable, conceptional statements made, kk1 interface
Related Notes : 
       
| 45694 | Transceiver installation | 
| 44103 | Setting up the PDC interface | 
| 31557 | The Multiple-Client concept of mySAP.com Solutions - Short O |