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Deploying VoIP in Branch Offices: A Checklist of Key Security Concerns
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VoIP is a disruptive event that has many ripple effects in branch-office networks. If call processing is added to the network, will the firewall let the voice connection through or not? Is sufficient QoS designed into the network to support voice adequately? Will the branch network support a highly available VoIP service? What are the security concerns?
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Introducing a Security Service Layer for IMS
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Anew layer of security equipment called Unified Threat Management (UTM) is being applied to the fast-changing requirements of the evolving IMS infrastructure. With the new IMS network comes IP security threats usch as worms and viruses. Service providers need to adopt a more comprehensive approach to securing their networks -- one that does not focus on point or edge security, but rather provides a flexible, consolidated service layer that begins at the network core.
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Security Gateway vs. Session Border Controllers for Protecting Fixed Mobile Converged Networks
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The emerging IP Multimedia Subsystems (IMS) and Unlicensed Mobile Access (UMA) standards are regarded as the cornerstones for creating FixedMobile Convergence (FMC). This article discusses the security challenges for next generation FMC networks.
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Fixed-Mobile Convergence (FMC) Applications: Moving from Theory to Reality
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The year 2006 will likely see fixed-mobile convergence (FMC) move from industry theory to a closer reality. Driving the move toward FMC is a merging of a number of trends, including subscriber churn and loyalty, next-gen telephony services, revenue generation possibilities and infrastructure technological advances.
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A New Breed of Engineer for the Evolving IP Services Market
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The accelerated adoption of VoIP, along with the emergence of IMS, means the existing network-engineering workforce is almost entirely void of VoIP and real-time services technical experts. The majority of today's telecom network engineers focus on router-based networks. Educational programs are needed to prepare future engineers entering the market with the session-management expertise necessary to succeed on the job.
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How UMA Enables Broadband IMS
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Originally developed by 15 leading companies in the mobile industry, Unlicensed Mobile Access (UMA) is now the 3GPP standard for enabling subscriber access to mobile services over Wi-Fi and broadband IP networks. The UMA standard effectively creates a parallel radio access network - the UMA Network (UMAN) that interfaces to the mobile core network using existing GSM-defined standard interfaces. This solution uses IP tunneling techniques to transparently extend mobile voice, data, and IMS services over IP access networks. Here is an overview of UMA.
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Don't Let SIP Slip -- The Central Nervous System for IMS
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The move towards all IP networks is gaining pace. UMTS Release 5 has brought the IP Multi-media Subsystem (IMS) into the fold and the industry is in a buzz about it. Operators are asking questions such as, 'When shall we build one?' and perhaps more importantly, 'What will it provide to my subscribers?' So, what is the IMS and what is it for?
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