>One of my clients has moved the server with a VFP app to another building and installed a 512K fixed link back to the original site. Users at the original site are now experiencing major delays in accessing records (up to 3 minutes!) from an SQL query.
>
>The length of the delay suggests to me that the supposedly 512K fixed link is not transferring data at anything like that speed......or is a 512K link just too slow.
>
>Any ideas? If the link is too slow, can I modify the app so that it becomes a client-server one with all processing done on the server? Any documentation on this?
>
>Ideas/suggestions gratefiully received!

Do you mean that you try to run queries against VFP table that is allocated on a remote machine with a speed of 512kbps?
If so keep in mind that VFP is not a database server, so that entire tables are transfered on the wire when you query them.
In that case I suggest to move to C/S (or n-tier) ASAP. You have at least two possibilities for upsizing:
SQL Server (transactions, replications, stability, good tools for administration)
MySQL (lightweight, limited functionality, low initial investment, may need additional maintenance, royalty-free)

There are some topics discussing using Server back-end with VFP in FoxTalk magazine.

HTH