Recursos VoIP - Enlaces

Fuente: Intelsat
Formato: PDF

This white paper introduces the current technology, architectures, and protocols that support VoIP in satellite networks. Strides in quality and consistency of service have joined VoIP’s previously accepted cost and efficiency advantages. It may also be the logical successor to telephony in general, facilitating the intermingling of voice conversations with data, imagery, email and all other forms of managed “packetized” traffic. The paper focuses on the most important concerns of public and private network operators.

Fuente: Surf Communication Solutions
Formato: PDF

Modems are much more sensitive to delays and jitter than voice, and as such, present a problem and will fall back to slower rates or even disconnect when encountering network conditions that do not adversely affect voice calls. As with Voice over IP (VoIP) and Fax over IP (FoIP), there is much effort going into the creation of standards to address these challenges. An emerging Modem-over-IP (MoIP) standard will ensure robust modem services over packet-based networks. This paper discusses the issues related to MoIP, and introduces the technologies involved in creating the standard.

Fuente: Aware
Formato: PDF

Experts from throughout the video-over-DSL value chain have collaborated to author a white paper aimed at helping telecom providers begin to explore this topic, with a comprehensive look at the business opportunities and technical challenges of video delivery over DSL from a telecom perspective. Note that their participation is a reflection of their interest in providing information about the video over DSL landscape and not an indication of any business relationships between them.

The paper begins with a look at the driving factors behind the rapid evolution of this industry. It introduces some of the opportunities and inherent advantages telcos have over competing video delivery systems such as cable and satellite. The paper then gives an overview of the market conditions, including the regulatory and competitive environment, market trends and forecasts, a sample revenue case, and results from an actual deployment. Enabling technologies and architectures are described. Finally, the paper presents an in-depth discussion of what is entailed in sourcing and delivering content: acquisition, aggregation, transport, and processing.

Fuente: Science Dynamics
Formato: PDF

A discussion of the current status of combining Video with existing Voice, Fax, Data and LAN Communications using Frame Relay over Public and Private Lines. The successful transmission of digitized voice over public Frame Relay data services over the past few years has drawn attention to the question of whether video services can be transmitted over the same link.

Fuente: Texas Instruments
Formato: PDF

Cable-based IP telephony offers a simplified solution for consumers to consolidate communication services provided by a single carrier. By providing a high-performance solution, TI offers Cable operators an opportunity to deliver an integrated Internet and voice service using the same cable spectrum. This White Paper, discusses the various factors involved in making cable a viable telephony medium, including the challenges of providing toll-quality telephony service on an IP network, Fax QoS challenges and international standards.

Fuente: International Engineering Consortium
Formato: PDF

Organizations around the world seek to reduce rising communications costs. The consolidation of separate voice, fax, and data resources offers an opportunity for significant savings. Accordingly, the challenge of integrating voice, fax, and data is becoming a rising priority for many network managers. Organizations are pursuing solutions that will enable them to take advantage of excess capacity on broadband networks for voice, fax, and data transmission, as well as utilize the Internet and company Intranets as alternatives to costlier mediums.

This tutorial discusses the principles related to implementing real-time voice- and fax-over-packet networks. An overview of the embedded software architecture is presented, and a system is described for sending voice, fax image, data, and signaling information over the packet network. Benefits to designers and manufacturers of this embedded approach are lower cost of goods sold, faster time to market, and lower development costs. Customers can gain a considerable advantage in time to market in building their communication systems.

This tutorial references a general class of packet networks, as the modular software objects allow networks such as asynchronous transfer mode (ATM), frame relay, and Internet/intranet (Internet protocol [IP]) to transport voice and fax. Currently, the Frame Relay Forum and the International Telecommunication Union (ITU) have defined protocols for transmission of fax over a packet network. However, the principles described are equally applicable to ATM networks.

Fuente: Lucent Technologies
Formato: PDF

Broadband rollout acceleration has caused service providers to reevaluate their overall packet voice introduction strategies. While earlier strategies focused on packet voice introduction to backbone trunking networks, the reality of today is that packet-based voice solutions mainly find a ready market in the access/CPE network environment. - This poses a choice for service providers to start introducing packet voice in either the core or the access network.

Fuente: International Engineering Consortium
Formato: PDF

This tutorial discusses the challenges of providing cable-based IP telephony and provides discussion of quality of service (QoS) challenges and the effort to develop and implement interoperability standards. An overview of an embedded software architecture is presented, and a system is described for sending voice, fax image, data, and signaling information over the cable network. Benefits to designers and manufacturers of this embedded approach are lower cost of goods sold, faster time to market, and lower development costs.

Fuente: International Engineering Consortium
Formato: PDF

The changes in the forces that shape the communications industry have been well documented and are nearing the level of common knowledge; examples include regulation and technology. Digital subscriber line (DSL) is the technology that is employed between a customer location and the carrier’s network that enables more bandwidth to be provided by using as much of the existing network infrastructure as possible. Speeds of up to 9 Mbps to the home are possible, given a number of limitations (e.g., distance and line quality). Using a greater range of frequencies over the existing copper line makes this increase in bandwidth possible. Voice over DSL (VoDSL) represents a breakthrough service by means of this technology.

This tutorial will explore the topic of VoDSL, emphasizing transport methods and standards groups. First, however, it provides a short history and explanation of DSL technology.

Fuente: Allied Telesyn
Formato: PDF

Voice over DSL (VoDSL) allows the end user to consume voice-band telecommunications services via existing devices but using data access technology on copper wires, namely, digital subscriber line (DSL). End users can enjoy cost savings of combined voice and data access without having to replace existing devices. VoDSL has been widely adopted in the telecommunications industry since its first appearance. This white paper will explore the key drivers of this technology in more detail and will examine some of the technical aspects of VoDSL and its main value proposition.

Fuente: protocols.com
Formato: HTML

There's a lot of talk about the suitability of Frame Relay, IP and ATM for carrying voice and the advantages of one over the other. It is clear that there are advocates of all three technologies and that each is suited to particular needs and environments. That being the case, they will all probably be around for some time to come. It is therefore becoming apparent that there will be a need for interworking between them. In this paper we will discuss the voice-enabling mechanisms employed by all three technologies and solutions for interoperability.

Fuente: Anixter
Formato: PDF

This white paper explains Voice over Internet Protocol (VoIP). VoIP is a type of network convergence. Specifically, it is the unification of voice and data onto a single network infrastructure. The idea behind VoIP is converting digital and analog communications (such as phone calls and faxes) into IP packets to be sent through one network instead of a separate telephony network. The voice signals first become digitized, then are split up into information packets and then sent through an IP network.

Fuente: Hewlett-Packard
Formato: PDF

In today's competitive telecom environment, service providers are returning to the basics of increasing revenue and reducing costs, while staying competitive by offering innovative new services. Operators are turning to convergent services to accomplish these goals. Convergent services combine the best of both traditional voice and data network technologies to deliver enhanced value at a reasonable cost. The HP Voice over Internet Protocol (VoIP) Interconnect solution allows for calls between the PSTN and the IP network, providing the necessary ISUP/IP protocol translation.

Fuente: U.S. Department of Labor
Formato: PDF

This white paper discusses VoIP technology in detail, including requirements, approaches, standards, and protocols. SWA applicability and SWA initiatives in this technology are also discussed. The challenges presented by VoIP are presented as well as alternative approaches to combining voice and data. Finally, there is a discussion of a few prominent vendors and their product lines.

Fuente: NetScout Systems
Formato: PDF

The long-hyped convergence of voice and data onto a single network is finally becoming reality. Major industry magazines and analysts are now discussing the explosion of VoIP deployments, and corporate rollouts have commenced in order to take advantage of the operational efficiencies and competitive advantages that are facilitated through VoIP's advanced communication services.

However, when convergence occurs on your network, will the infrastructure be ready to handle this added burden? Almost universally, industry analysts talk about incomplete and delayed VoIP implementations caused by poor pre-deployment analysis, planning and lack of wellintegrated management tools that address both networked voice and data applications. The risks are not only the investments made in the VoIP equipment and upgraded infrastructure, but also in the potential impact on organizational productivity when a voice initiative has a negative effect on existing networked business services. The reputation of the IT organization can hinge on the success or failure of a VoIP implementation.

The solution to mitigate these risks is a lifecycle approach to VoIP deployment: assessment, planning, impact analysis, and ongoing management. Although completing each of these steps may seem, at times, overwhelming and complex, engaging a network and application performance management solution, especially one that will view VoIP in context with all other application traffic on the network, will increase the potential for a successful project.

This white paper describes how the nGenius Performance Management System can help in completing a comprehensive analysis, developing a thorough plan, and assessing the impact of your VoIP implementation. A thorough investigation of each step of the lifecycle process increases the probability of a successful rollout, and ultimately achieves optimized performance of both business and voice applications across the enterprise network.