telcosec / learn-ss7

Learn SS7

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SS7 Signalling in Mobile Networks

Welcome aboard!

Last weak got a new course and its time to add more notes about SS7 Stack (public) and some little details about SS7 Security.

RFS

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SS7 Introduction

• The overview of the SS7 system
• The definition and structure of the SS7 signalling network: SP, STP, SL, LS, etc.
• The logical division of SS7: MTP and User Parts
• Use of SS7 protocol in 2G and 3G mobile networks and fixed networks
• Overview of various SS7 protocols

MTP – Message Transfer Part

• The functions of the different MTP levels
• The structure and functions of MTP signal units, signalling link states and link management functions
• MTP 3 message handling – addressing, routing, load sharing, and distribution
• The overview of Signalling Network Management and Testing functions

ISUP – ISDN User Part

• Use and functions of ISUP in PSTN, ISDN, and mobile networks
• Various ISUP signalling procedures: call handling, circuit management, etc.
• ISUP messages and their structure

SCCP – Signalling Connection Control Part

• SCCP functions and applications
• SCCP signalling modes: connectionless and connection oriented
• SCCP addresses and their usage in 3GPP networks
• SCCP messages and their structure

TCAP – Transaction Capabilities Application Part

• TCAP functions and applications
• Functions of TCAP component and transaction sub-layer
• TCAP messages and their structure

MAP – Mobile Application Part

• GSM/UMTS MAP interfaces and operations
• Overview of MAP signalling scenarios for mobility, call handling, supplementary services management, recovery, etc.
• Dialog portion functions

Traffic case

• Detailed analysis of a mobile terminating call scenario with focus on MTP, SCCP, ISUP, TCAP, and MAP messages and their parameters

CAMEL Application Part

• An introduction to Intelligent Networks nodes and functions with CAMEL as an example
• Overview of IN call triggers and CAMEL subscription information records
• Overview of basic CAP operations.

SS7 over ATM

• Overview of SAAL-NNI protocols, their functions, and message formats
• Example SSCF and SSCOP procedures

SS7 over IP

• Overview of SS7-over-IP interfaces, protocols, and emulation options
• Functions and messages of SCTP protocol, example SCTP packet flow
• Overview of M3UA functions and messages
• M3UA addressing with routing keys and routing contexts
• Example M3UA signalling scenarios for establishment of an association, user data transfer, and signalling network management.