The Signaling Connection Control Part (SCCP) layer provides connectionless network services and an address translation mechanism, called global title translation (GTT), capability above MTP3. A global title can translate a string of digits (e.g., a dialled 800 number, calling card number, or mobile subscriber identification number) into a destination point code and/or subsystem number. A subsystem number uniquely identifies an application at the destination signaling point. SCCP provides the transport layer for TCAP-based services within the OSI model.
The schematic on the right show how SCCP fits into the OSI model.
SCCP supports the following features:
- Routing and translation functions.
- Management functions.
- Transfer of data without logical signaling connections.
The SCCP software supports two classes of service, in connectionless mode:
- Class 0: Basic connectionless class.
- Class 1: Sequenced connectionless class.
TelcoBridges and SCCP
TelcoBridges supports SCCP as part of its SS7 signaling stack.
Refer to the appropriate Toolpack release:
- SCCP and TCAP Configuration Version 3.0
- SCCP and TCAP Configuration Version 2.10
- SCCP and TCAP Configuration Version 2.9
- SCCP and TCAP Configuration Version 2.8