|512 is OK for docs and email but adding internet browsing saturates the link. This is a third of the standard T1 bandwidth. If this is a frame relay link its half that which means your port speed maybe 512 but your CIR is 256 which is your actual bandwidth.|
Even putting a server at this location and doing file replication may not work if the link is over utilized.
A caching appliance may speed up access and reduce utilization but the last one I cheched into was 10K [riverbend steelhead 300 wan accelerator].
This is why doing a vpn thru local internet providers can give you the most bang for your buck. You can get more bandwidth for less money.
Another consideration is terminal services. This is where you put a TS server at your main location and have your users at the remote connect to it. Processing/apps/docs loads on this server(s) and only video/mouse/keyboard goes across the wan link. I do this for 8 remote sites throughout the state.
It isn't always about the slowest link but how the link is used.