How to make interconnection between a legacy system and SAP system?

Hi Group,
I have a query on the interconnectivity between a legacy system( non-SAP ) and an SAP system.
The legacy provides data in the form of Files only.
my queries are as under:
1)
how can I make a connection to the Legacy from my SAP system?
2)
what are the different ways by which I can connect these 2 different systems?
3)
I hope there might be a chance of connecting the systems by way of using webservices, in this case what are the things I need to follow inorder to make the connection and get the data from legacy?
please provide me with necessary info on these queries to proceed further.
thanks in advance.
Regards,
Vishnu.

Hi,
U can use the GUI function m modules to fetch the data from legacy systems.
Also With the help of Remote FMs u can get connected to the SAP backgrounds from NON SAP background like Portal.XI is an interfacing tool used to connect 2 SAP or SAP to non SAP medium.
Regards,
Ajit.

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