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 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.
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Lawful Intercept of Voice over IP - Overview
Lawful Interception (LI) is a requirement placed upon service providers to provide legally sanctioned official access to private communications.
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Session Control in IMS Based Converged Networks
This white paper provides an overview of the different strands of standardization that are providing the base for converged networks to become a reality and describes some of the key functional elements. We then focus on the session control requirements that IMS places on the infrastructure.
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SIP Security and the IMS Core
This White Paper examines the security needs that new IMS architectures place on the host networks. Whilst IMS has created some widely accepted standards it has also highlighted architectural differences in the converging networks.
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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.
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