Signaling System 7 (SS7) defines the network architecture, configuration and message transport protocol for Public Telephone Networks (PTNs). SS7 was originally designed for a closed telecommunications community, and therefore possesses limited authentication facilities. Deregulation coupled with PTN convergence with the Internet and wireless networks significantly increase vulnerabilities, ena...

The disruption and loss of SS7 signalling networks during the summer of 1991 in North America by the “brown outs” and the resultant loss of services, revenue and customers, has focused the minds of many Telcos to put management systems in place to ensure network robustness. Their primary purpose being to identify problem trends earlier and speed up restoration of failed signalling components. W...

A message based comparative study between signaling system #7(SS7) and MFC Signaling is done. Here the limitations of SS7 and MFC signaling are also studied. The reasons for the transition from Multi-frequency Coded (MFC) Signaling to SS7 has been discussed.

Signaling System Number 7 (SS7) is a packet switched network protocol for signaling call set-up (and teardown) in the Public Switched Network (PSN). SS7 includes priorities for different types of signaling messages that determine how the messages are handled during conditions of severe signaling network congestion. Simulation results of modeling the behavior of the SS7 congestion control mechan...

Status of This Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Abstract This memo defines a protocol for...

the Advanced Mobile Phone System (AMPS), is among the key technologies for providing personal communications services (PCS). PCS will ultimately enable communication with a person anytime, anyplace, and in any form. Its key features have been described in recent publications [1–3]. D-AMPS has been specified by the Electronic Industry Association (EIA) in cooperation with the Telecommunication I...

PSTN, the world's circuit-switched network, has employed Signalling System #7 as its protocol suite for international and national interconnection during past decades. VoIP networks however have developed different signalling protocols suitable for IP environment. Gateways interconnecting VoIP and PSTN networks are usually proprietary and expensive solutions. Today an open source software can p...

This paper analyzes some of the reliability features of the transport layers of the signaling system no. 7 (SS7) and compares them to the reliability and performance achievable with the protocol stack for signaling transport over IP currently being defined in the SIGTRAN working group of the IETF. It identifies parameters which have to be adjusted and restrictions to available addressing option...

The Public Switched Telecommunications Network (PSTN) has becoming increasingly dependent on Signalling System 7 (SS7) due the drive to provide new services, such as Calling Name ID, Local Number Portability, the migration of other services to regional and national databases (e.g., E800, Calling Card, and eventually E911) and deregulation. Additionally, the explosion in the mobile communication...

Signalling System No. 7 (SS7) networks are used to transport call control messages for both traditional telephony and advanced Intelligent Network (IN) based services. A large number of IN implementations have been successfully deployed in recent years, however a key factor in ensuring their ongoing commercial success will be that they continue to meet specified performance targets. Because net...