AT&T Technical Reference 54022 (February 1997)

TR 54022, February 1997
Intelligent Call Processing (ICP) Service
Signaling System No. 7
Network Interface Specification

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Scope

AT&T Technical Reference 54022 provides the interface requirements for the interconnection of customer databases to the AT&T Signaling System No.
7 (SS7) network for the Intelligent Call Processing (ICP) Service. It includes SS7 protocol messages and procedures, interface architectures, application interface description, and physical link requirements.

Organization

Technical Reference 54022 contains the following sections:

Section 1 provides the purpose and organization of TR 54022.

Section 2 provides an overview description of the ICP service.

Section 3 provides a description of the AT&T SS7 network interface architecture. This includes:

• The link access architecture that allows the interconnection of a customer signaling point (e.g., ICP customer data base) to the AT&T Signaling Network via customer dedicated 56Kbps A-link pairs;
• The access arrangement options for interconnecting to the AT&T SS7 signaling network; and
• The protocol architecture for internetwork addressing of Signaling Points (SPs) as well as message screening for allowed message types and destinations.

Section 4 describes the differences between the American National Standard Institute for Telecommunications (ANSI) specifications, T1.111 – 1992 for the Message Transfer Part (MTP) and T1.112 – 1992 for the Signaling Connection and Control Part (SCCP), and the corresponding AT&T specifications. In addition, the differences between the ITU-T (ITU Telecommunication Standardization Sector) Transactions Capabilities Application Part (TCAP) – 1993 Recommendations and the AT&T TCAP specifications are specified.

Section 5 provides a technical description of the ICP service.

Section 6 is a complete description of the ICP TCAP Application Service Element (ASE) and provides the definition of all of the TCAP query, response, and error messages, their content, and message flows.

Section 7 describes the performance objectives for the SS7 network. The performance parameters include message transfer delay, SS7 network availability and signaling link error rate.

Section 8 provides a listing of related Standards documents and information on obtaining them.

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