Editing Demarcation point (section)

=== United Kingdom ===
[[File:BT NTE5.JPG|thumb|A [[British Telecom]] NTE5 master socket, showing the removable front plate and test socket]]
{{main|British telephone sockets}}
In the United Kingdom, the demarcation point occurs on the LJU master socket, whose wiring is partly owned by the customer, partly owned by the phone company. Other secondary sockets are the customer's property. Newer NTE-5 master phone sockets have a removable front panel: the front panel and its wiring is the customer's, while the rear wiring is Openreach's.

The removable panel allows separation of these two parts and independent maintenance, and access to a test socket to determine whether line faults are in the customer's wiring or Openreach's (formerly BT's) external network.