How to extract files from external server

Dear Friends,
I need to connect to an external non SAP server, from which i need to extract invoice files.
Invoice files are of two types:
1. .dat format files which contain invoice data
2. .PDF or .JPEG documents, which are supporting documents for those invoice.
My question are
1. How do i connect to the external server?
2. Do i have to do a FTP from SAP to that file server?
3. Do i have to fetch the .dat file using dataset statments?
4. What are the basis and network related activities involved to get connected to that external server?
Any inputs and help on this is highly appreciated and rewarded.
Thanks,
Simha

Hi Simha,
1. How do i connect to the external server?
Using  FTP or RFC, BAPI are also possible to get the data from Non SAP server.
2. Do i have to do a FTP from SAP to that file server?
based on your company policy use FTP to transfer the data.
3. Do i have to fetch the .dat file using dataset statments?
    yes. if u using ECC6.0 try this method
CL_RSAN_UT_APPSERV_FILE_READER=>APPSERVER_FILE_READ
Reward if found helpful.

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