In this book we summarize important developments in telecommunications with a focus on Signalling System No. 7 (SS 7) network reliability. But why is SS 7 network security and reliability so important? According to the Open Systems Interconnection (OSI) model the term network refers to the Layer 3 network service, which is offered by the Message Transfer Part (MTP) and Signalling Connection Control Part (SCCP) to higher layers. An SS 7 network outage results in a breakdown of signalling between the individual des of the network, so that telecommunication network services are longer available to customers. Apart from the tremendous nancial damage to the network operator, the social consequences of such a network breakdown cant be underestimated. Since the MTP is the central part of the SS 7 network, it is of crucial importance for network security and reliability. The MTP is published in different versions and should w be what we call stable . Is it really stable? Does it work properly in real networks? Does it t new requirements so that further changes within the MTP are needed? Various different implementations have existed for a long time and are used in national as well as the international network. Due to this, an objective is t to p- form any further changes within the MTP in order to avoid compatibility problems with existing and running systems. Experience shows that compatibility problems are always related to further development of the MTP.
Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
Date of Publication
Computing: Professional & Programming
Place of Publication
Country of Publication
Springer-Verlag Berlin and Heidelberg GmbH & Co. K
108 Illustrations, black and white; XVIII, 278 p. 108 illus.