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Policy on Backbone Attachments

The purpose of this policy is to define the interface between the data backbone and the user's network, and to identify the different funding sources involved in supporting the interconnection of the two.

The backbone includes all devices and cabling necessary to support data transmission between the interfaces defined below. It includes devices such as gateways and wiring centers, and inter- and intra-building cabling (and the associated conduit space) and software needed to enable communications between the gateways.

A local network is one which provides data communications among user locations independently of the existence of the backbone. Local network components include devices such as ethernet concentrators and other equipment used for local area networking, as well as intra-(and in some cases, inter-) building cabling. Attachment of the backbone to the local network will be made via a cable from the router (supplied by TNS) to an interface (supplied by the using office) on the local network. The point where the gateway cable meets the interface becomes the demarcation point. Everything from that point outward is the responsibility of the TNS. Everything from that point inward is the responsibility of those operating the local network.

Diagram A shows the demarcation points in the physical and logical perspectives.

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