Recursos VoIP - Enlaces

Fuente: Stanford University Electrical Engineering
Formato: PDF

SIP, specified in RFC2543, is an elegant protocol designed to initiate calls made over IP networks. It permits rapid call setup and provides a rich set of features, including user mobility. It achieves a simple, flexible, and extensible architecture by leveraging existing internet standards. Though primarily used for internet telephony at the moment, it is general enough to be used to set up any kind of connection, from multicast voice broadcasts to multiplayer game sessions to video conferences.

Fuente: Avaya
Formato: PDF

This paper explores some of the benefits that SIP - properly deployed - can provide to the enterprise. Topics discussed include: the value that SIP brings to the enterprise, how SIP can exploit the existing call processing system, and the essential elements that make up a SIP network. Anyone involved in planning their enterprise voice networks will value the clarity this document provides to the potential of SIP to the Enterprise.

Fuente: Ingate Systems
Formato: PDF

This white paper talks about Session Initiation Protocol (SIP). It is expected that real-time person-to-person communication, like IP telephony (VoIP), presence, instant messaging, voice, video, and data collaboration will be the next big wave of Internet usage. The Internet standard for such communication is SIP. For businesses looking to join this burgeoning SIP user community, it is important to ensure that the enterprise network is adequately prepared and safeguarded. However, universal connectivity across the Internet is frequently thwarted because the NATs and Firewalls in an existing network are not SIP capable, a common situation for businesses of all sizes.

Fuente: Siemens
Formato: PDF

This paper summarizes where SIP has come from, how it works, and what makes it such a useful enabling protocol. It then describes how SIP is used in applications including telephony, conferencing and messaging, back office integration and how it is being extended to provide innovative services and accommodate the requirements of a real time IP communication.

From an application point of view SIP is continuing to develop rapidly and is innovative as we continue to envision all of its uses for home and business. This white paper is aimed at people who want to understand the concepts and drives behind SIP adoption and how it is evolving to support new enterprise business applications.

Fuente: Helsinki University of Technology
Formato: PDF

SIP combines the features of the Advanced Intelligent Network from the telecom world for fixed and mobile telephony, with Internet features for email, Web, transactions, and entertainment. This paper discusses both signaling and application internetworking of SIP with different networks. Firstly it involves the architectures, mechanisms or protocols when internetworking with PSTN and mobile networks as well as extending the Internet with the intelligent network capabilities. Then applications internetworking of SIP are briefly introduced via the examples of Real-time Fax and video conferencing.

Fuente: Cisco Systems
Formato: PDF

This white paper will address current techniques available to address issues regarding the interoperability and coexistence of H.323 and SIP in packet telephony networks.

Fuente: Hughes Software Systems
Formato: PDF

This paper describes the various network deployment scenarios of the SIP Network Server from Flextronics Software Systems (FSS). It also outlines the various value-added services that are enabled through the deployment approach adopted by FSS. FSS' SIP Network Server is a carrier-grade, high performance, feature rich offering that serves as a core infrastructure router by providing the transaction-stateful proxy, registrar and location server, and presence server functionality.

Fuente: RADVISION
Formato: PDF

The Session Initiation Protocol (SIP) is a signaling protocol for initiating, managing and terminating voice and video sessions across packet networks. Borrowing from Internet protocols, such as HTTP and SMTP, SIP is text-encoded and highly extensible. SIP can be extended to accommodate features and services such as call control services, mobility and interoperability with existing telephony systems. SIP is being developed by the SIP Working Group, within the Internet Engineering Task Force (IETF). The protocol is published as RFC 3261. This section describes the key constituents of SIP.

Fuente: Alcatel
Formato: PDF

For enterprise business, SIP is simple, standard, scalable and allows new media-blending services to be created easily. It is built on proven, promising and evolving Internet technologies. Alcatel has the right answer with its OmniPCX IP Communications Server, which leverages existing investment in order to facilitate the smooth and cost-effective migration to Internet telephony.

Fuente: EventHelix
Formato: PDF

SIP terminal to ISDN PBX call flow.

Fuente: Tektronix
Formato: PDF

Spectra2 is a hardware and software testing solution for testing VoIP and converged networks. From one integrated product you can easily monitor, test, and generate VoIP and SS7 ISUP signaling and media. Spectra2 provides comprehensive analysis tools such as call trace, message filtering, and message decode. Analysis can be performed in real-time or post capture.

Fuente: Alcatel
Formato: PDF

SIP, because of its basis in web technologies, is positioned not to replace H.323 in this enabler role, but to enable the next revolution where communications services will be integrated seamlessly and intuitively into the daily work environment of the employee. The web services and web-based technologies available will determine whether SIP is successful, both from an ease of use and an ease of deployment perspective.

CTI applications of the past were mostly customer care applications largely because their complexity and the associated costs to customize and integrate required a strong ROI. With SIP, communication services are integrated into web applications and environments more simply and by a broader set of web developers who don’t need to be CTI experts.

In this paper, practical business applications are blended with technical material to show how SIP might be used to help an organization compete in today’s business or eBusiness climate. Lastly, this paper examines how Alcatel has approached SIP with its OmniPCX Enterprise IP Communications platform and how SIP figures prominently in Alcatel’s vision of unified and interactive communications.

Fuente: Cisco Systems
Formato: PDF

IP communications technology-the convergence of data, voice, and video onto a single network-can help organizations to reduce the costs and complexities associated with communications and to enable progressive business gains. This paper describes the benefits of SIP to enterprise customers and explains the comprehensive Cisco roadmap for delivering SIP-based solutions-an evolving strategy that helps deliver stronger IP communications benefits to enterprise customers today and in the future.

Fuente: Ubiquity Software
Formato: PDF

SIP-based Internet telephony systems need to be appropriately dimensioned, as the call and registration rate can reach several thousand requests a second. This draft proposes an initial simple set of metrics for evaluating and benchmarking the performance of SIP proxy, redirect and registrar servers. The benchmark SIPstone-A expresses a weighted average of these metrics.

Fuente: Telchemy
Formato: PDF

This paper provides enterprise network managers with a six step methodology, including pre-deployment testing and network readiness assessment, to follow when preparing their network for Voice over IP service. Designed to help alleviate or significantly reduce call quality and network performance related problems, this paper also includes useful problem descriptions and other information essential for successful VoIP deployment.