Back to Search Results

Training Course Summary:

Signalling System 7 (SS7 / C7) is the main architecture used for out-of-band signalling in digital telephone networks.

This course provides a comprehensive overview of the ITU Signalling System No.7 (SS7 / C7), including the procedures for setting-up, managing and clearing down calls between users, C7 principles and higher level protocols.


The course covers current terminology, management and future applications, and is essential for delegates wanting to learn the basics of C7, its capabilities and its use.

Pre-Requisites:

Course 301: Introduction to Data Communitcations and Networking, or course 381: Introduction to Telephony, or equivalent experience in datacomms or networking, is a pre-requisite for this course.

Who Should Attend:

All telecommunications engineering staff responsible for planning, implementing, supporting or managing mobile or fixed-line telephone services.

Training Course Overview/Content:

Types of Signalling
The 3 main types of signalling:
User-Network Signalling
- Analogue types, ISDN
Network- Network Signalling
- Analogue types, C7
User-User Signalling
- In ISDN, Q.Sig and DPNSS


CAS and CCS
Channel Associated Signalling
- State-based signalling
Common Channel Signalling
- Message-based signalling, C7
CCS and CAS Comparison


HDLC
What is it and how it is used?
Data link control
- Framing, Addressing, Control, Error checking
Use of HDLC
- C7, ISDN (LAPD), V5.1 and V5.2, Others (LAPB, LAPF, LAPM and LAPD+)


Signalling Systems and C7
ITU-T Signalling System No. 7 and how it works
- Associated and quasi associated mode
Examining parts of C7
- MTP, TUP, ISUP, SCCP, TC (and TCAP), Proprietary parts
Signalling units of C7
- MSU, LSSU, FISU


Standards and Recommendations
Standards bodies
ITU-T recommendations
ETSI standards


Signalling Links and Signalling Points
Signalling points in C7 networks
- STP
- SSP
- SCP
Mated pair configurations
What is a signalling link?
Different types of C7 signalling links
Signalling link selection (SLS)
Point codes and global titles


The C7 Protocol Stack
The open systems interconnection (OSI) reference model
The C7 protocol stack and how it relates to the OSI model
Components of the C7 stack
- MTP, SCCP, TC, TUP, ISUP


Signal Units
What are C7 signal units?
C7 signal unit components
- Octets, flags, FCS
- Indicator bits
- BSN and FSN
Types of signal units
Fill In Signalling Unit (FISU)
Frame layout of a FISU
Link Status Signalling Unit (LSSU)
- Frame layout of a LSSU
- The status field
Applications of the MSU
- Frame layout of a MSU
- Service information octet
- Signalling Information Field
- Understanding routing labels
- National point codes

Message Transfer Part (MTP)
What is the MTP?
Functions of the MTP
The three layers of the MTP
The addressing systems
- The signalling point code

The Signalling Connection Control Part (SCCP)
What is the SCCP?
How the SCCP supplements the functions of the MTP
How the SCCP is used to interconnect at a global level
Structure of an SCCP message
SCCP and global titles
- Global title translation
Transaction Capabilities (TC)
Roles of TC and TCAP
The TCAP layers
Component sub-layer
Transaction sub-layer


TUP and ISUP
Understanding the user parts
- TUP
- ISUP
ISUP message format
ISUP call control
Tracing ISUP


Intelligent Network (IN) Outline
IN standardisation
Conceptual model
IN services
Capability sets 1 (CS1)
Building Applications
Service Creation
Future scenarios


IN Service Details And Description
Do Not Disturb
Freefone (0800)
Calling Card
VPN (Mobile & Fixed Line)
UPT
A-Party Discrimination


Additional Material
ISUP Trace
BTNUP (IUP) Trace
BTNUP (IUP) Message Description
ITU-T Q-Series Recommendation list
List of Acronymns