The sockets for phone's in my house are rectangular boxes with 4 large plugs (like sku21020 on http://www.oldphoneworks.com/adapters-plugs-jacks/). I use an adapter to convert them to an ordinary phone connection. Voice telephones work, but vacuuming or anything that jars the adapter makes my DSL intermittent till I reseat the adapter. Is it possible to replace the old sockets (and eliminate the adapters) without rewiring the whole system?
There are aricles on the web about speeding up internet connections by disconnecting the "bell wire" on phone connections. Are these relevant to the US phone system?