I suppose I should mention I'm a network administrator for two school districts, I manage pfSense router/firewall software. I know all that.
We're paying for 1.5 meg DSL, but usually only get 0.5 to 0.7 of it.
The Asus router I have is very highly rated and a hundred bucks or more so it's not a cheap low-grade device.
These throughput graphs for Windows 7 and Windows XP are showing performance using either SpeedTest.net or CenturyLink's own speed test website.
Speed tests are blasting hundreds of packets per second to run the connection as fast as possible, and to saturate the line. The throughput graph should be a solid line running near-horizontal at maximum speed all through the test, not jumping repeatedly from 100% to 0% every half-second or so.
And actually it WAS doing max performance in a steady line, when the DSL was new about five years ago.
I've replaced the modem and router a couple times now. I've put an APC lightning strike surge protector on the line.
I'm getting real close to replacing all the house-wide filters that CenturyLink installed in the telco boxes, and replacing all the outside wiring just in case this is due to corrosion.--
CenturyLink remote pedestal: RUBY, 10 miles west of Gilman, WI
»Rural Century Telephone remote terminal unit
»Name of this pole-mount outdoor telco canister?