said by sreilly24590:
When I see the downloads slowing I usually run the dslreports speedtests. I'll run several times and look for an average.
I've looked through the various menus and setting for the modem and see nothing relating to sync speed or margin. A hint here might be useful.
What kind of modem do you have? As far as I know All DSL modems
display downstream and upstream sync speeds. Easiest thing to do is just google your modem and either look for the manual online or google sync speeds+model of your modem. Something should pop up.