Convergence resource links

"Access mediation supports the arbitration of call control and signaling between individual networks, resources, users, and services. Access mediation is the next evolutionary step for the advanced intelligent network (AIN). With the growing importance of the Internet, access gateways are a critical component of access mediation. This tutorial presents several application scenarios that utilize an access gateway point between the traditional telephone network and the Internet. First, the tutorial will review general background information on access mediation. As part of this overview, specific information on the important components of access gateways will be addressed. Access gateway-application scenarios will also be discussed. Finally, the tutorial will present several elements of network design that are crucial for a network to support an access gateway." Free registration required. From IEC.

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RAD white paper on circuit extension over IP using TDM over IP as a replacement for traditional voice networks.

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The latest from Network World on VoIP, IP PBXes and related technologies.

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A tutorial from the International Engineering Consortium.

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"Multiservice network architecture combines the multiple layers of legacy architecture into fewer network elements, thereby removing barriers to operational efficiency and flexibility. Convergence creates a unified network that operates cohesively to promote efficiency, enhance service features, and offer cost savings%u2014key elements of today's competitive marketplace." Free registration required. From IEC.

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Vendor marketing organization to push converged voice, video and data networks. Also see Cisco, others form converged network group, Network World, 09/10/03.

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Can be used to estimate the bandwidth which must be provided through an IP based network to satisfactorily transport a given busy hour traffic level.

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"This tutorial discusses the H.323 protocol standard. H.323 is explained with an emphasis on gateways and gatekeepers, which are components of an H.323 network. The call flows between entities in an H.323 network are explained, and the interworking aspects of H.323 with H.32x family protocols are discussed." Free registration required. From IEC.

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Engineering white paper by Subha Dhesikan of Cisco Systems.

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"In this White Paper, TI's Paul Struhsaker offers an overview of VoIP over WLAN applications, shows that the technology exists today to implement VoIP over WLAN applications as an integral part of next-generation seamless wireless voice/data networks, and explains a number of critical deployment issues."

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While carriers have been slow to launch this hosted telephony option, IP Centrex is seen as delivering more benefits than traditional Centrex or PBXs for less. Network World, 10/20/03.

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This paper looks at the 10 essential requirements of managing this new technology to ensure successful IP telephony deployment in the enterprise - for today and beyond. In PDF

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Cisco white paper that discusses five nines. Focuses on how Cisco claims it meets the standard, but includes considerable discussion of the standard itself, such as what sorts of failures would count in a calculation of five-nines reliability.

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"Users of traditional Centrex service, PBXs, and Key Systems are currently faced with the challenge of deciding whether they should grow or replace their current service or system. The purpose of this site is to help telecom managers understand what IP Centrex can do for their companies so that these managers can factor IP Centrex into their technology plans."

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Lets you calculate how many lines you'll need for VoIP based on the coding algorithm and packet duration you expect to use.

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"This guide answers some of the most commonly asked questions about VoIP, including: What is the difference between Internet telephony and business voice over IP?; What are the current options for implementing business voice over IP?; How reliable is business voice over IP today? How is the voice quality?; What are the ramifications of VoIP in terms of bandwidth demands?; Will different VoIP systems interoperate?; What is the role of a Private Branch Exchange (PBX) and can it reside on a data network as a mission-critical application server?; What equipment investments or changes to the existing data network are required to implement business voice over IP?; Can VoIP co-exist with other mission-critical data applications already on the network?; What types of applications or advantages will VoIP provide today and in the future?" MCK white paper, in PDF. Requires free registration.

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"Robert Frances Group says the recent trend toward the convergence of telephony and computer systems has exposed voice systems to abusers who have traditionally limited their efforts to attempted breaches of data networks and systems. IT executives should take note and implement plans that will mitigate the chances of a hacker's success."

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Archive of our e-mail newsletter.

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Summary of Network World's TechTour covering VoIP. Includes a Webcast and slides from keynote speaker as well as slides from participating vendors.

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Headlines of latest items relating to convergence standards from Converge Digest.

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"Quality of Service (QoS) issues are critical to the successful deployment of Voice over IP (VoIP) systems. Such impairment factors as latency, jitter, packet loss, and echo must be considered along with the ways in which they interact. The ability of a network to support high-quality VoIP calls and the configuration of various hardware and software parameters are important in ensuring caller satisfaction." Intel white paper.

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NIST draft: "Lower cost and greater flexibility are among the promises of VOIP for the enterprise, but the technology presents security administrators with significant security challenges. Administrators may mistakenly assume that since digitized voice travels in packets, they can simply plug VOIP components into their already-secured networks and remain secure. Unfortunately, the process is not that simple. This publication explains the challenges of VOIP security for agency and commercial users of VOIP, and outlines steps needed to help secure an organization's VOIP network." In PDF

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"IP Telephony based networks, which might be a core part of our Telephony infrastructure in the near future, introduce caveats and security concerns which traditional telephony based networks do not have to deal with, have long forgotten about, or have learned to cope with. The security risk is usually overshadowed by the technological hype and the way IP Telephony equipment manufacturers push the technology to the masses. This paper highlights the different security risk factors with IP Telephony based networks." From Sys-Security.com

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"Independent news, views and support" for Skype.

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"You would like to extend your existing enterprise applications for voice access; the problem is, you're in Application Development and your voice infrastructure is supported by the Networking group. Can you still get there from here? IBM Consulting IT Architect Veronika Megler describes a practical approach that can be implemented today. The components involved -- a VoIP gateway and a voice server -- will fit easily into your existing application infrastructure. Even better, all the elements of this EAI operation should fit nicely into your job description." From IBM.

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Tutorial from the International Engineering Consortium.

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"Notes, comments and observations" on voice over IP and related technologies.

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"Opinions, News, Ponderings on the VoIP industry as well as general technology-related stuff. Gadgets are one of my favorite topics."

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"VOIPSA's mission is to promote the current state of VoIP security research, VoIP security education and awareness, and free VoIP testing methodologies and tools."

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Series of tutorials and overviews on convergence technologies, from Web-enabled call centers to IP telephones. In PDF; require free registration.

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"There's more to telephony than passing voice: the rest is called signaling. Think of it as command and control for the voice functions. Signaling started with manipulating the loop current on the line between the central office and the phone. Today, signaling inside the PSTN, and on data networks, is all based on messages in packets. Here's a capsule overview of legacy signaling and three types for VoIP: H.323, SIP, and MGCP." From Webtorials.com. Free registration required.

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"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." From Newport Networks.

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Daily VoIP news links.

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"This Taxonomy defines the many potential security threats to VoIP deployments, services, and end users. The overall goal is to help drive VoIP security awareness with the press, industry and public."

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"Community funded SIP network, information site and forum with news and reviews."

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When it comes to IP PBXs, products from IP-centric vendors and legacy PBX companies are characterized as much by their differences as by their similarities.

In general, the two camps can be summarized this way: the legacy PBX vendors include Alcatel, Avaya, Mitel, Nortel and Siemens; the IP newcomers are led by Cisco, 3Com, Shoreline and Vertical Networks. Network World, 04/07/03.

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"All about Voice Over IP and Internet Based Telephony."

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"This Wiki covers everything related to VOIP, software, hardware, service providers, reviews, configurations, standards, tips & tricks and everything else related to voice over IP networks, IP telephony and Internet Telephony."

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"This site contains information on how to troubleshoot VoIP problems, free online diagnostic tools and useful background information on voice quality and packet statistics."

Platform(s): VoIPTroubleshooter.com, VoIP.

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