Newport Networks Sesson Border Controller



White Papers and Application Notes

Listed here are Newport Networks' White Papers with brief summaries of the topics. There is an on-line version of each, plus a PDF copy of the papers may be downloaded from the document centre.

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IPsec in VoIP Networks

VoIP Security is becoming ever more important as high profile fraud cases hit the press. Strong authentication of users helps mitigate these attacks, a fact recognised by 3GPP in the IMS security framework. But 'VoIP over IPsec' poses problems in wireline networks when it encounters NATs. This paper examines the problems when IPsec meets NAT and looks at TISPANs solution to the problem.

Read Paper on-line | Download PDF copyInterconnect White Paper

SIP Security and the IMS Core

The security of SIP-based networks and of Voice over IP in general is ultimately about a complete security architecture, not a single product or protocol. Fixed/Mobile Convergence and IMS have created some widely accepted standards and also highlighted architectural differences in the converging networks. Whilst the overall objective of providing a flexible, secure network and secure services is common, the implementation details differ from network to network.

Read Paper on-line | Download PDF copyInterconnect White Paper

Emergency Call Handling in VoIP Networks

Emergency Call Handling (ECH) is an essential feature of today's public telephone networks, and if Voice over IP based PSTN replacement is to become a reality, the new technology will have to deliver reliable handling of emergency calls. The needs of ECH have been extended as a result of recent national emergencies, such as floods and terrorist atrocities. These have focused Governments' attention on the need to secure the lines of communication for key workers and facilities, as well as support for emergency calls..

Read Paper on-line | Download PDF copyInterconnect White Paper

Lawful Interception Overview

Lawful Interception (LI) is a requirement placed upon service providers to provide legally sanctioned official access to private communications. However, Voice over IP (VoIP) technology has enabled the mobility of the end-user, so it is no longer possible to guarantee the interception of calls based on tapping a physical line.

Read Paper on-line | Download PDF copyLawful Intercept White Paper | Audio/visual presentation

UK VoIP Interconnect

The United Kingdom is about to become the first market where VoIP interconnection will be introduced and regulated. The VoIP interconnect infrastructure will mimic the capabilities of today's PSTN. This pioneering move in the UK was catalysed by British Telecom's announcement of their 21st Century Network program - the migration of their PSTN network to carry voice and multimedia traffic over an all-IP infrastructure.
Read Paper on-line | Download PDF copyInterconnect White Paper

Session Control in IMS Based Converged Networks

Session border controllers which can be physically separated into signalling and media elements are an essential part of building converged networks based on an IMS architecture. This white paper provides an overview of the different strands of standardisation that are providing the base for converged networks to become a reality and describes some of the key functional elements.
Read Paper on-line | Download PDF copyIMS White Paper

QoS Bandwidth Management

As Voice over IP (VoIP) emerges as the future of voice communications, questions remain about its quality and security. Put simply, the actual capacity of an IP network to carry voice is poorly defined and not well understood. Congestion, packet loss and delays in an IP network can adversely affect the Quality of Service (QoS) for the subscribers. Therefore, mechanisms to manage bandwidth usage must be utilised to maximise the service quality.
Read Paper on-line | Download PDF copyQoS White Paper

Carrier Class Voice over IP

With recent technological advances in Voice over IP, the communications industry has at last reached a position of strength. In the past, technology lacked the maturity to deliver a profitable and sustainable VoIP business model, but recent breakthroughs allow carriers to introduce profitable, carrier-class VoIP services.
Read Paper on-line | Download PDF copyVoice over IP White Paper

SIP, Security and Session Controllers

Rolling out a public SIP service brings with it several security issues. Both users and Service Providers must understand these issues, but the burden is with the Service Provider to offer a secure and reliable service to the user. This White Paper examines these issues and looks at how the Service Provider can overcome these through the deployment of Session Controllers in the access network and in the core.
Read Paper on-line | Download PDF copy SIP Security White Paper

Solving the NAT Traversal Issues for Multimedia over IP Services

NAT traversal is a challenge that all Service Providers looking to deliver public IP-based voice and multimedia services must solve. The challenge is to provide secure connection to subscribers behind NATs and Firewalls. This White Paper describes the various proposals for solving the Firewall and NAT traversal problems.
Read paper on-line | Download PDF copyNAT traversal

VoIP Bandwidth Calculation

Calculating how much bandwidth a Voice over IP call occupies can feel a bit like trying to answer the question; "How elastic is a piece of string?" However, armed with a basic understanding of the parts that make up the whole, the question becomes easier to understand. This White Paper examines the process that turns voice into Voice over IP. Also see the on-line VoIP Bandwidth Calculator.
Read Paper on-line | Download PDF copyBandwidth Calculation White Paper