Openreach have started to fit external NTE's in place of the popular NTE5 socket. The only real benefit is to Openreach themselves as the new socket means they can easily disconnect any internal wiring & diagnose line faults without requiring entry to the premises. However, if you have ADSL then you should consider changing the first socket on any internal wiring so you can benefit from a centralised ADSL faceplate such as the NTE2000, NTE2005 ...