Recursos VoIP - Enlaces

Fuente: Wipro
Formato: PDF

Recently, several protocols have been created to allow telephone calls over IP networks, notably SIP and H.323. These emerging standards have opened up the possibility of a broad and dramatic decentralization of the provisioning of telephone services so they can be under the user's control. IETF IPTEL work group has proposed an architecture in which network devices respond to call signaling events by triggering user-created programs written in a simple, static, non-expressively-complete language. This language is called Call Processing.

Fuente: Nortel Networks
Formato: PDF

Customer-driven enterprises are embracing IP Telephony solutions, aiming to reap the benefits of networks, communications and application convergence. These include enhanced customer services through real-time, media-adaptive, anticipatory applications and by improved business and service continuity across multiple channels (including the branch and the contact center), and improved employee collaboration and lower Total Cost of Ownership, both aimed at increasing enterprise competitiveness.

Fuente: University of Cape Town
Formato: PDF

This paper describes a case study that was conducted to investigate software engineering of concurrent communicating systems (CCSs). Best practice software engineering methodologies were used to specify and design a Voice over IP (VoIP) system, which was then implemented. The methodologies utilised were the Unified Modelling Language (UML) and the Specification and Description Language (SDL), and the project specifically explored their combined use.

Fuente: NetIQ
Formato: PDF

Good quality voice-over-IP (VoIP) conversations depend on maintaining strict constraints for packet loss, delay, and jitter (contrast this with traditional data network traffic, where the focus is on response time or throughput). This white paper provides design tips on how to successfully deploy Voice over IP in a data network.

Fuente: Intel
Formato: PDF

Although many enterprises are eager to deploy voice and data services over Internet Protocol (IP), they see their legacy Private Branch Exchange (PBX) systems and upfront costs as roadblocks to the enhanced capabilities that IP would bring. This paper demonstrates that legacy PBX equipment does not have to be replaced for enterprises to begin a phased migration to IP convergence. Appliance media gateways from Intel make the implementation of IP technology in PBX systems possible right now with low upfront investment costs.

Fuente: Zarlink Semiconductor
Formato: PDF

Changing over to a single, converged network doesn’t have to be a radical, revolutionary step. Circuit Emulation is a technology that allows the network to evolve in the direction of a single converged network without risking either customer revenues or requiring wholesale replacement of all parts of the network. This white paper explores where and how circuit emulation may be best exploited.

Fuente: Cisco Systems
Formato: PDF

Cisco 7940/7960 IP phones can support either the Skinny Call Control Protocol (SCCP) to run with Cisco CallManager, the Session Initiation Protocol or the Media Gateway Control Protocol (MGCP), but not more than one simultaneously. This is possible because they load different firmware versions on bootup. This functionality is transparent to the end user, and you enable it through changes to the basic text-based configuration files that the phones download from a Trivial File Transfer Protocol (TFTP) server.

Fuente: Cisco Systems
Formato: PDF

Providing simple connectivity to remote sites is no longer sufficient as business requirements shift from discrete voice and data communication solutions to a more sophisticated model that requires an integrated approach. The Cisco 7200VXR Series Router is the ideal system to deploy at central locations to facilitate the aggregation of data and voice traffic from remote sites. It combines flexibility and reliability with an unrivaled feature set that complements the extensive capabilities of the latest generation of integrated services routers.

Fuente: Cisco Systems
Formato: PDF

This paper talks about Cable IP Solutions for High-Availability Networks. Cable operators are migrating toward converged network architectures to achieve minimized capital and operational expenditures and realize higher returns on invested capital. As operators converge critical services such as voice over IP (VoIP) to common network architectures, the requirements on the IP network become much more stringent (compared to requirements on best-effort data).

Fuente: Cisco Systems
Formato: PDF

This white paper focuses on how an enterprise can easily, quickly, and cost-effectively add IP communications capabilities and services, including call processing, entry-level voice mail, automated attendant services, and other IP phone applications, to its small and medium-sized branch offices with less than 100 users and where a centralized deployment is not optimal.

Fuente: Cisco Systems
Formato: PDF

Leaders have recently come to realize that having a strong, scalable network infrastructure is essential to their organization's overall success. Cisco Enterprise Architecture for the small and branch office demonstrates to small, midsized, and large organizations, as well as their service providers, how to build new value into their IP networks through incorporating business-critical services such as telephony, network security, switching, content delivery, and messaging into a single, integrated networking system that can scale and adapt to new environments. Once the choice to move to IP Communications has been made, the next step is to determine how best to deliver packet voice services. This paper will provide some guidance on the different options available.

Fuente: Cisco Systems
Formato: PDF

Cisco Systems is committed to providing accessible and usable solutions to improve the way all people work, live, play, and learn. As the global leader in network communications, Cisco devotes extensive resources to helping ensure the accessibility of its IP communications solutions, including a dedicated accessibility team staffed with experts. And because Cisco is its own most demanding customer, its employees with disabilities use Cisco products in their daily work, providing immediate, relevant feedback to designers about accessibility and usability.

Fuente: Cisco Systems
Formato: PDF

Cisco Unified CallManager systems and gateways provide multiple ways to synchronize time. Using lab test results, this paper compares the advantages of the two primary options, explains how to mitigate risks, and describes the benefits of synchronization with an external network time server such as the Symmetricom Network Time Protocol (NTP) SyncServer S200. The test findings also apply to other IP telephony platforms, such as Cisco Conference Connection, Cisco Customer Response Solutions, Cisco Unity Voice Connector, Cisco Personal Assistant, and Cisco IP Phone Productivity Services (PPS).

Fuente: Cisco Systems
Formato: PDF

This paper provides information about various components that can be part of a Cisco IPICS solution. This information will help to understand how these components interoperate in a Cisco IPICS deployment. The paper includes topics like Router Media Service (RMS), integrating Cisco IPICS with SIP Providers, Land Mobile Radio Gateway, and Cisco Unified IP Phones.

Fuente: Cisco Systems
Formato: PDF

As enterprises extend their IP telephony and high-value application deployments from central sites out to remote offices, one of the factors considered vital in deployment is the ability to cost-effectively provide backup redundancy functions at the remote branch office. However, the size and number of these small-office sites precludes most enterprises from deploying dedicated call-processing servers, unified-messaging servers, or multiple WAN links to each site to achieve the high availability required. The Cisco IP Communications solution uses Cisco CallManager in combination with a feature called Survivable Remote Site Telephony (SRST) in Cisco IOS Software to help enable companies to extend high-availability IP telephony to their branch offices.