scope:

SCOPE, PURPOSE, AND APPLICATION

General

The Signaling Connection Control Part (SCCP) provides additional functions to the Message Transfer Part (MTP) to provide both connectionless as well as connection-oriented network services to transfer circuit-related and non circuit-related signaling information and other types of information between exchanges and specialized centers in telecommunication networks (e.g., for management and maintenance purposes) via a Signaling System No. 7 (SS7) network.

A functional block situated above the MTP, (see T1.110-1999 (R2005)), performs the functions and procedures of the SCCP. The SCCP is capable of using the services of the MTP as described in ATIS-1000111, chapters ATIS-1000111.1 to ATIS-1000111.8. The combination of the MTP and the SCCP is called the Network Service Part (NSP).

Objectives

The overall objectives of the SCCP are to provide the means for:

1. Logical signaling connections within the Common Channel Signaling Network; and

2. A transfer capability for signaling data units with or without the use of logical signaling connections.

Functions of the SCCP are used for the transfer of circuit related and non circuit-related signaling information of the ISDN User Part with or without setup of end-to-end signaling connections. These functions are described in ATIS-1000112.4 and ATIS-1000113.4. Figure 1/ATIS-1000112.1 illustrates the embedding of the SCCP within the common-channel signaling system.