How to make this set-up working

Question

Hi All,

Can Anyone give me an inputs how are we going to make our systems work.
with this kind of set-up. Just a simple clue I will do the research.

            A                    B                              C
        Client ------->Server------------>Web Service

Items A and B is ours, while C is from our source. They want this kind of set-up. And I have no idea how to make this work.

Thanks in Advance.


Regards,

Vince