The BT/Openreach "Interstitial ADSL/VDSL Faceplate" was a clever design that was designed to fit onto an existing NTE5 type master socket WITHOUT
any rewiring. We were one of the first companies to offer this faceplate & during production we sold literally thousands with zero returns! That was nearly 10 years ago now and as with anything electronic they don't last forever and are now starting to fail. The bad news is production of these units ceased years ago, the last revision being the Mk3. The good news is a replacement is
However, when replacing there is a choice of faceplates available....
The nearest direct
replacement is the Openreach Mk4 faceplate
Unlike the previous version this is designed to fit onto the new NTE5C
type master socket, indeed it is supplied as a complete unit (the NTE5C
back plate & the Mk4 VDSL/ADSL
If you don't have any extensi...