I have a TS22AL that I have used for years for POTS testing. With more and more DSL on the lines, the need is there for a cheap filter/splitter which will allow POTS testing. I have put a few Z-Blockers in series to get by the Harris Data Lockout feature but it unbalances the line so much that you cannot release from talk back to monitor mode. Anyone have a specific hack they use to get around this? I know Harris sells a splitter, but $200+ for a splitter seems a bit much.