SCCP:Architecture

The SCCP software supports these functions:

• Connectionless Service
• Management
• Routing
• Traffic Limitation and Congestion Control (ITU-96)
• Interworking

SCCP provides the functions and procedures to transfer data across an SS7 network. SCCP is a service provider to TCAP and a service user of MTP Level 3 (as shown in the figure immediately below).

A SCCP layer has a Network section which represents a network identifier for a specific protocol variant. For a Network you must define:

• LSAP(s)
• Routes (for a specific or range of destination point codes (DPC))
• Userpart

SCCP LSAP must be associated with one MTP3 Userpart via a 1-to-1 association. A SCCP Route indicates a DPC that is accessible from this SCCP configuration node and their SSN.

SCCP Userpart can be used in conjunction with an above local TCAP layer and can be used as a standalone and communicates with remote TCAP layer (host application). See the connection mode table in the SCCP Userpart Configuration section.

A SCCP layer has a Userpart section which represents a sub-system number.

References

• Connectionless Service
• Management
• Addressing
• Global Title Translation Association
• Routing
• Traffic Limitation and Congestion Control
• Interworking
• Messages