Lenny38

Has your pc been "tweaked" MTU settings adjusted? 

If not;

dslreports.com

-test & tools

-doctor tcp

-2nd file from top ending in exe

-open not save

307824            default

-yes                default

-yes               

-yes                1492

-select network adapter you are using to connect

restart comp for settings to take effect

I have been able to use a dial up modem on the FiOS service.  Your fathers Dell sould have a PCMCIA slot, all techs carry these wireless cards and wireless routers.  Just a thought

DSL filters will cause an echo on a FiOS line, make sure you have removed all of the DSL filters.  There are several cordless phones and ans. machines that are not compat. with FiOS.