When my sister first got a computer her speeds were in the 40s.
Somewhere down the road she now only gets about 20k.
She was having trouble with one of her phones. I looked in her phone box and the security people had put their lines on the main and the extensions on their other pair.
Her phone problems turned out to be an inside phone. I am not sure when her speeds slowed as it could have happened over the past 5 years or so.
Has anyone confirmed that having a security system in the phone loop slows dial up?