Time punching machine Connection to SAP

Hi Experts,

i have a dobut , we have Time punching machine at our client side, now they wanted to connect the same Time punch in -out machine to SAP.

Is there way to connect.?

The document whihc i am referfing it is saying it is posible to connect to external system. can u plz help me.

Personnel Time Events (HR PDC)

Regards

Swapnil