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Online / Level 2

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Course summary

This course examines in detail the infrastructure of modern fixed and mobile networks, addressing issues surrounding security and resilience.

Who would benefit

This course is suitable for experienced engineers with a solid understanding of IP networking. 


Attendees on this course should have existing knowledge of IP networking and an appreciation for IP-related security. An understanding of telecommunications principles would be desirable.

Course contents

Telecommunication Services

The building blocks of modern telecoms networks with a look at fixed network infrastructure. Services are put into context in alignment with the key regulatory bodies and the advantages and disadvantages of packet switching over circuit switching are discussed.


The traditional public switched telephone network and its associated signalling requirements. The delivery of voice is examined together with the E1 bearer structure and the evolution to a fully digital network.

SS7 Signalling Networks

The SS7 signalling protocol suite and how these protocols are used to address the requirements of a telecoms network. The structure of an SS7 network is discussed, including the use of signalling transfer points, database access and call management.

SS7 Protocols (MTP, ISUP & SCCP)

A more detailed look at SS7 protocols, including the underlying SS7 transport network provided by MTP, the use of point codes and signalling link selection. Through examples of call set-up message flows, the call control functions of ISUP are examined. The role of SCCP is also covered, namely the provision of a global title.

Signalling Transport SIGTRAN

The challenges of deploying SS7 over E1 links, introducing SS7 over an IP bearer as a solution. The challenges of carrying SS7 signalling traffic over packet-switched bearers is covered, along with mitigation techniques. The use of SCTP as transmission layer and MTP adaption layers is also explored with examples.

Evolution to Next Generation Networks

A detailed look at modern developments in network infrastructure with the SIP and RTP protocols for carrying voice over IP bearers, as well as discussion around convergence.

Security Aspects of SS7

The vulnerabilities of SS7 networks from the point of view of the network and the user. The security benefits and challenges of carrying SS7 over an IP bearer are discussed in detail.

Mobile Network Infrastructure

The infrastructure required for the provision of 2G, 3G and 4G mobile networks. Core and radio nodes are examined, as well as network enhancements and signalling flows.

Cellular Security

Security provision within mobile technologies. Mitigations for various attacks are discussed including encryption, signalling integrity and IPSec. Points of vulnerability for DoS attacks on network interfaces are also identified.


This course is delivered in an entirely online format.

Detailed Course Description

Complete this form for a detailed course description.

Training Formats

We can arrange classroom training, one to one training, or online training to suit your requirements. Learn more

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