SS7 and Sigtran

Originally designed for TDM based transport, SS7 is the foundation of signalling within PSTN and PLMN networks. This course will catalogue the operation of SS7, both from an architectural and procedural perspective. Key focus will be placed on the operation of the MTP lower layers, as well as analysis of SCCP and ISUP. In addition, this course will also focus on the transport of SS7 across IP based transport networks. As part of this, the Sigtran User Adaptation layers will be examined, as well as the operation of SCTP.
This course will contain the following sections:


  • Duration: 1.5 hours
  • Topic areas covered include
  • 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
  • Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding
  • Duration: 1.5 hours
  • Topic areas covered include
  • MTP1 Characteristics and Physical Formatting
  • MTP2 Signalling Units - MSU, LSSU, FISU
  • Link Establishment Procedures
  • Link Reliability Mechanisms - Preventive Cyclic Retransmission
  • Activity
  • Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding
  • Activity
  • Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding
  • Duration: 1 hour
  • Topic areas covered include
  • 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
  • Activity
  • Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding
  • Duration: 1 hour
  • Topic areas covered include
  • 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
  • Activity
  • Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding
  • Duration: 1 hour
  • Topic areas covered include
  • 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
  • Activity
  • Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding
  • Duration: 1.5 hours
  • Topic areas covered include
  • 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
  • Activity
  • Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding
  • Duration: 1.5 hours
  • Topic areas covered include
  • M3UA Protocol Architecture
  • M3UA Deployment Options
  • Routing Keys and Routing Contexts
  • Layer Management Functions
  • M3UA Header Format
  • Procedures - ASP Establishment, Data Transfer, Signalling Network Management
  • Activity
  • Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding
  • Duration: 1 hour
  • Topic areas covered include
  • 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
  • Activity
  • Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding
  • Duration: 1 hour
  • Topic areas covered include
  • 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
  • Activity
  • Where appropriate, network traces and associated exercises will feature throughout the section to enhance understanding
  • Duration: 1 hour
  • Topic areas covered include
  • 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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Duration 2 days
CPD Learning Credits 0

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