End User Special Access is generally ordered between two end user locations within a LATA . One of the end user locations must be terminated in a circuit which has the capability and requirement to provide a switching function to a jurisdictionally interstate connection or the circuit end- to-end, is physically interstate (may be known as corridor service), both or either circuit location may have the switching capability. Broadcast services need not have the switching capability stated herein.
Naming conventions for identification of these locations are assigned or specified as follows. The end user location with the capability to switch the circuit InterLATA is identified as the Primary Location (PRILOC) and the other end user location is identified as the Secondary Location (SECLOC). When both end user locations have such switching capability, the assignment of the PRILOC versus SECLOC is arbitrary and the choice of the customer. When the circuit is physically inter- state, the assignment of PRILOC is arbitrary and is customer assigned.
Another application for use of the EUSA is to order between two locations where at least one of the locations has digital cross-connect system (DCS) capabilities.
LATA is the acronym for Local Access and Transport Area, which defines a geographic area with common economic and social attributes. A LATA may cross a state boundary.AT&T subdivided the United States into some 160 LATAs upon divestiture of its local exchange operations in 1984. Each LATA approximates the subdivision of AT&T's LongLine network prior to divestiture. As part of the divestiture agreement, AT&T and other interexchange carriers (IXCs) could provide service between LATAs (interLATA), while the LECs could provide service within a LATA (intraLATA).