SS7 and Sigtran System Engineering
(2 days or 12 hours)
As mobile and fixed Service Providers migrate their core networks to an architecture based on IP transport, interworking with legacy circuit switched networks is a key issue. In particular, SS7 signalling must be supported across these Next Generation Networks and as such, Sigtran is being deployed extensively in support of this. This course is designed to provide a concise explanation of both SS7 and Sigtran, examining the operation of both protocols and underlining the key similarities and differences between the two.
Who Should Attend
Telecommunications Engineers requiring a detailed explanation of SS7 and its use in IP telecoms networks. Network Architects involved in the development and deployment of an IP based Next Generation Network.
Pre - Learning
Pre-Learning is provided to prime those attending the instructor led phase. Each lesson is based on an interactive online format and should take about 30 minutes to complete. The pre-Learning lessons are:
- Test of Understanding - Try the online check to see how much you know.
- Packet Switching.
- Protocol Stacks and IP.
- IP Addressing.
- Sigtran Basics.
Course Outline
Divided into 10 sections, the topics covered will include:
Section 1: SS7 and Sigtran Introduction (1.5 hours)
- Requirements for SS7 and Sigtran in modern networks.
- SS7 Network Architecture - Signalling Points, SPC, STP, SLS, SRS.
- SS7 Protocol Stack - MTP 1, 2 and 3, SCCP, SS7 Applications.
- SS7 Standards.
- Sigtran Transport Architecture.
- Sigtran Protocol Stack - IP, SCTP, User Adaptation.
- Application Servers and ASPs.
Section 2: Message Transfer Part Levels 1 and 2 (1.5 hours)
- MTP1 Characteristics and Physical Formatting.
- MTP2 Signalling Units - MSU, LSSU, FISU.
- Link Establishment Procedures.
- Link Reliability Mechanisms - Preventive Cyclic Retransmission.
- Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding.
Section 3: Message Transfer Part Level 3 (1 hour)
- MTP3 SNM and SMH.
- Routing Label Composition.
- Signalling Message Handling - Discrimination, Distribution and Routing.
- MTP3 Primitives - Transfer, Pause, Resume, Status.
- Signalling Network Management - header format and functionality.
- Signalling Traffic Management - signalling link and route management, changeovers, changeback etc.
- TWhere appropriate, network traces and associated exercises will feature throughout the section to enhance understanding.
Section 4: NUP and ISUP (1 hour)
- NUP Messages - key headers and fields.
- Call Establishment using NUP.
- NUP Supplementary Services.
- ISUP Messages - key headers and fields.
- Call Establishment using ISUP.
- ISUP End to End Signalling.
- Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding.
Section 5:SCCP and SCCP Applications (1 hour)
- SCCP Architecture.
- Connectionless Control - Class 0 and 1, UDT, XUDT, LUDT.
- Connection Orientated Control - Class 2 and 3, CR and CC, SLR, DLR.
- SCCP Routing and Global Titles.
- SCCP Message Formats and Types.
- SCCP Management.
- TCAP Operation - Transaction and Component Sublayers.
- Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding.
Section 6: Stream Control Transmission Protocol (1.5 hours)
- Drivers for SCTP Development - limitations of TCP.
- SCTP Architecture - Associations, Endpoints, Streams, Chunks.
- SCTP Association Establishment - INIT, INIT-ACK, COOKIE-ECHO, COOKIE-ACK.
- SCTP Data Transmission and Acknowledgement - TSN, SSN, SID, SACK.
- Congestion Control and Load Balancing - Slow Start, Congestion Avoidance, Fast Retransmit.
- Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding.
Section 7: MTP3 User Adaptation Layer (1.5 hours)
- M3UA Protocol Architecture.
- TM3UA Deployment Options.
- Routing Keys and Routing Contexts.
- Layer Management Functions.
- M3UA Header Format.
- Procedures - ASP Establishment, Data Transfer, Signalling Network Management.
- Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding.
Section 8: M2UA and M2PA (1 hour)
- M2UA Protocol Architecture.
- M2UA Interface Identifiers.
- M2UA Operation - border primitives, messages and message formats.
- MTP2 User Data Transfer and Support for SNM.
- Services Offered by M2PA.
- M2PA Message Format and Procedures - link setup, data message transfer.
- Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding.
Section 9: SUA and IUA (1 hour)
- SUA Architecture and Deployment.
- Routing Keys and Routing Contexts.
- SUA Management and Data Transfer Messages.
- IUA and Q.931 Architecture.
- IUA Procedures - address mapping, message formats, Q.931 message mapping.
- Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding.
Section 10: IP Network Security (1 hour)
- Confidentiality, Integrity and Authentication of Signalling Messages.
- Techniques used to provide CIA - encryption, hashing, digital signatures and certificates.
- Protecting Sigtran with IPSec.
- IPSec- AH and ESP.
- Sigtran and TLS (Transport Layer Security).
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