ABSTRACT: The Advanced intelligent Network (AIN) is an evolving, service-independent architecture that each Local Exchange Carrier (LEC) is deploying. AIN allows a LEC and other service providers to quickly and economically create and modify telecommunications services for its subscribers.

This is accomplished by means of a set of reusable, service-independent network functions. The embedded base of digital switching systems and the Common Channel Signaling (CCS) network using the Signaling System Number 7 (SS7) protocol form the infrastructure for the AIN architecture.

This document describes the Telcordia view of the following CCS network interfaces between a LEC's CCS network and an Interconnecting CCS Network (ICN) for AIN:

• The interface when an ICN Network Access Point (NAP) sets up a call to a LEC Service Switching Point (SSP) for AIN processing.
• The interface when an ICN carries a call between a LEC switch and a remote switch.
• The interface when an ICN SSP queries a LEC SCP (Service Control Point) for AIN processing
• The interface when an ICN SSP queries a LEC SCP for AIN processing on behalf of an Intelligent Peripheral (IP)
• The interface when an ICN transports the non-circuit-associated messages between a network containing the SSP and the LEC network containing the SCP

• GR-905
• GR-1432
• GR-1298
• GR-1299
• GR-1280
• GR-1129