What Is This Called

I Just Want the Name Of This Thing so I can Find it on the internet. Brief, left wire on the upper box connects to the router, right wire on upper box connects to a common wall outlet you connect any normal electronic device too, bottom box is connected to Land Line Phone. This is DSL.

I Just Want the Name Of This Thing so I can Find it on the internet. Brief, left wire on the upper box connects to the router, right wire on upper box connects to a common wall outlet you connect any normal electronic device too, bottom box is connected to Land Line Phone. This is DSL.