Premises networks are wired worldwide, across every industry, in both small and large-scale applications.
[citation needed] The ownership of on-premises wiring varies between jurisdictions: It depends on the location of the demarcation point.
[citation needed] In the United States and Canada, most premises wiring is owned by the customer.
[citation needed] For many installations, this is a network interface device mounted on the outside of the building.
In the United Kingdom, the demarcation point is the wall jack, and hence most of the on-premises wiring is the property of the telephone company.