Teradata connectivity with SAP

Hi Team,
 
I need information on below points , we are looking to pull data from SAP ECC system into teradata:
 

• Can we connect using Teradata , directly to SAP or SAP BW ?
• Do we require ETL tools like Informatica only or can Teradata direcly pull data from SAP/ SAP BW
• Is there is utility that TD has , using which we can connect to SAP or SAP BW ?
• Is is mandetoty to pull data from BW or can we pull directly from SAP ECC system?

 
please help me out!
 
Thanks