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Overview
Signaling System #7 (SS7) (AKA C7 outside N.America) is the predominant signalling
system for the public switched telephone network (PSTN) and also Public
Land Mobile Networks (PLMNs). New packet networks for voice telephony
also typically rely on SS7 for signalling. SS7 defines the
procedures for setting-up, managing and clearing down calls between users,
as well as non-circuit related signaling. For example it is used to provide
Local Number Portability (LNP) as mandated by the
FCC, Call Management Database Services (CMSDB) such as
800,900, and 500 services (0500,0800,0898 Etc within
the UK), and Line Information Database Services (LIDB) such as calling
card services. The SS7 protocol is also a key component in providing
Advanced Intelligent Networks (AINs) as defined by Bellcore and
Intelligent Networks as defined by ITU-T.
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Prerequisites
The course has no prerequisites, although a good technical understanding of voice networks and associated technology would be beneficial.
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Training Method
- Lectures
- Exercises
- Demonstrations
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Course Details
- Duration: One Day
- Language: English
- Documentation: English
- Participants: No limitation
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Learning Outcomes
- Knowledge of C7/SS7 Architecture Including Signaling Points and Links
- Ability to Define Signal Unit Structure
- Knowledge of what Function MTP Performs
- Knowledge of what Function the User Parts for Fixed Line Perform
- Ability to Explain ISUP Message Format and Describe Basic Messages
- Knowledge of what Function SCCP Performs Including SCCP Classes
- Knowledge of what Function TCAP Performs
- Knowledge of what an IN is and what the Associated Standards are
- Knowledge of what the Wireless User Parts are and their functions
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Who Should Attend
- Technical development and support professionals involved in the support and implementation
of networks and services who wish to have a general appreciation of SS7 concepts and terminology
- Planners and developers of packet based carrier grade networks and services that
wish to have a basic grasp of the purpose of SS7 and associated terminology
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Presenter Details
The course is delivered by Lee Dryburgh, lead author of
"SS7/C7 Protocol, Architecture and Applications".
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Course Contents
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What is Signaling?
- What is Signaling?
- What is the Purpose of Signaling
- Where does C7/SS7 Signaling Take Place?
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SS7/C7 Network Elements
- The Three Types of Signaling Point (SP) Explained
- Links and Linksets Explained
- The N.American SS7 Network Architecture Shown
- The UK C7 Network Architecture Shown
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SS7/C7 Overview
- The C7/SS7 Protocol Stack compared with the OSI Model Shown
- C7/SS7 Functionality Overviewed
- Requirements of C7/SS7 Signaling
- Advantages of C7/SS7 Signaling
- Associated Mode
- Quasi-Associated Mode
- Who are the C7 and SS7 Protocol Standards Bodies?
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Message Transfer Part 1 (MTP 1)
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Message Transfer Part 2 (MTP 2)
- MTP 2 Overviewed
- Signal Units and the Three Types Explained
- SU Layers of Operation Shown
- MTP 2 Overhead Shown
- SU Delimination Described
- SU Error Detection/Correction Explained
- Basic Error Correction Method Shown
- Link Error Monitoring Described
- Link Initial Alignment Shown
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Message Transfer Part 3 (MTP 3)
- Functions of MTP 3 Described?
- MTP 3 Overhead Shown
- Signaling Information Field (SIF) for MTP 3 MSUs Shown
- Contents of Service Information Octet (SIO) Explained
- Service Information Octet (SIO)- SubService Field (SSF) Shown
- Service Information Octet (SIO)- Service Indicator (SI) Shown
- The ITU Routing Label Described and Shown
- The ANSI Routing Label Described and Shown
- The UK Routing Label Described and Shown
- International/National SS7/C7 Networks Hierarchy Explained
- Relationship between L1, L2 and L3 Shown
- Signaling Network Management (SNM) Overviewed
- Signaling Message Handling (SMH) Overviewed
- MTP Summarised
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Fixed Line User Parts
- User Parts Described
- TUP Overviewed
- NUP/IUP Explained
- Two NUP Call Sequences Shown
- N-ISDN User Part (N-ISUP) Overviewed
- Signaling Information Field (SIF) for N-ISUP MSU Shown
- N-ISUP Evolution Explained
- N-ISUP Variants Discussed
- N-ISUP Message Groups Shown
- Five N-ISUP Messages Explained/Shown
- Two Call Sequences Shown
- Supplementary Services Described
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Signaling Connection Control Part (SCCP)
- Signaling Connection Control Part Overviewed
- Two Categories of Service and Four Protocol Classes Decribed
- Connection Orientated Procedures - Example
- Connectionless Procedure - Example
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Intelligent Networks (INs)
- Intelligent Networks (INs) Described
- IN Standards Described
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Transaction Capabilities Application Part (TCAP)
- Transaction Capabilities Application Part (TCAP) Overviewed
- TCAP Definitions Detailed
- Components/Transactions Described
- The Transaction Capabilities (TC) Described
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Wireless User Parts
- MAP Described
- BSSAP Described
- BSSMAP Described
- DTAP Described
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C7/SS7 Protocol Standards and Recommendations
- C7 Protocol Standards - Europe/Britain Detailed
- SS7 Protocol Standards - Europe/N.America Detailed
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Appendices
- Appendix A - SS7/C7 Standards
- Appendix B - Further Reading
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