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signalling connection control part (SS7) (SCCP)

The Signaling Connection Control Part (SCCP) is a signaling control part with additional functions for the Message Transfer Part( MTP) in SS7 signaling.

The SCCP part provides the ability to transfer messages connection-oriented or connectionless between any nodes in the signaling network. Typically, it supports the Transaction Capabilities Application Part ( TCAP).

SCCP defines routing functions derived from call numbers and also has management functions for subsystem usage. For the connection type, SSCP defines four service classes, identified by the digits 0 to 3. Service class 0 operates connectionless, sending data to the destination without a session being established. Service class 1 is also connectionless and without sequence control. Messages are guaranteed to reach the destination within the sequence. Service class 2 is connection oriented and the session of the SCCP connection is negotiated beforehand, and service class 3 is also connection oriented and has flow control.

Englisch: signalling connection control part (SS7) - SCCP
Updated at: 28.03.2019
#Words: 140
Links: skinny client control protocol (Cisco) (SCCP), media transfer protocol (MTP), signalling system no 7 (SS7), connection, connectionless (CL)
Translations: DE

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