The Oracle FTP Adapter supports FTP over SSL (FTPS) and Secure FTP (SFTP) to enable secure file transfer over a network.
Just setting up useSftp = true usually is not enough... Firstly you have to find out what our admin team mean by "jailed accounts" and SCP... You have to confirm the server accepts SFTP connections, SFTP and FTPS are different protocols... Try connecting using FileZilla client, if you can connect from FileZilla most likely you will be able to connect from SOA...
For more information, see links below
Im able to connect through winSCP with scp protocol.
Since I dont have permission to "change directory" "cd /home/iclt". I have made one Advanced setting in winSCP client to connect to remote server.
That is made "Remote Directory" value to empty, by default it is "/home/iclt".
FTP Adapter supports FTP over SSL (FTPS) and Secure FTP (SFTP)... It does NOT support SCP protocol... If you can't connect using FTP/FTPS/SFTP you will have to write a custom connector...
As vladodias already suggested that winSCP can not be connected using FTP adapter. When ever you are finding if anything is not possible using adapters, you can use Spring Context as alternative. Using Spring Context, you can include Java code into the SOA Composite and by using invoke activity you can easily make calls through it.
Once I had a scenario to write a file to a location, which has been sourced from a table in a BLOB format. I just converted the byte streamed file to a character file using simple java codes embedded in the Spring Context.
Example for the Spring Context to read an Excel file : Marcel Knows Best: Example: Excel Parsing & Processing with SOA Suite 11g
Please let me know if any more information is required.