TR NWT 000394 : ISSUE 5

Defines Bellcore's proposed view of what a Stored Program Control Switching System provides to an Interexchange Carrier (IXC) with a Signaling System Number 7 (SS7) access to Local and Transport Areas (LATAs) for the purpose of establishing and releasing call connections involving an IXC. The procedures discussed in this document apply to call connections between distinct networks involving and IXC, independent of whether the connection is intraLATA or interLATA. It focuses on the exchange of SS7 messages necessary for establishing and releasing basic voice calls involving an IXC.