OP might have a 'short'which caused the switch house to 'think' he's

always OFF HOOK, probably went through that sequence of loud recording

followed by no more POT line power, thus he hears dead silence, no calls

come through and callers get BUSY tones.



correct..

if the red and green are shorted together accidentally along a POTS wire, the POTS will not work anywhere in the house.
Since the DSL works at high frequencies, the "short" is not a good short for the DSL signals and so it can still work...

so look for a short

Mark