Quote from FuturesTrader71:
My experience has generally been that cable companies provide higher bandwidth (but then rob you of it when more subscribers come on the same segment you are on). I prefer DSL though. I have experienced little to no down time with DSL and some great consistency. If you will go with a dual connection, then make it cable AND DSL. The service is usually provided by one company anyway; for example, DSL from Earthlink or from AOL is a service provided by SBC anyway. So if SBC goes down, then both providers are down. Same with Cable service. Also bare in mind that when one connection goes down, there is a delay in switching to your backup connection. Your trading program, unless specifically designed for this, is bound to one connection only. It will likely require a restart to pick up the backup connection.