I had a similar issue but instead I opted to replace all the wiring with CAT5E. I used the old phone wiring as a pull-wire to get the CAT5E through the walls very, very slowly. CAT5E was used as I needed all the flexibility I could get and 1Gbit was enough at the time.
The RJ11 panels on the wall were replaced with RJ45, crimped everything. Took a full day of carefully pulling wires but in the end I got gigabit all over the home.
The next owner will probably call me an idiot for using CAT5E in 2019.
The RJ11 panels on the wall were replaced with RJ45, crimped everything. Took a full day of carefully pulling wires but in the end I got gigabit all over the home.
The next owner will probably call me an idiot for using CAT5E in 2019.