Xem 1-20 trên 63 kết quả Ip telephony
  • This document provides design considerations and guidelines for implementing Cisco IP Telephony solutions based on the Cisco Architecture for Voice, Video, and Integrated Data (AVVID). This document is primarily an update of the design guidelines and information presented in the Cisco IP Telephony Solution Reference Network Design (SRND) for Cisco CallManager releases 3.1 and 3.2, which is available online at http://cisco.com/go/srnd This document assumes that you are already familiar with the terms and concepts presented in previous versions of the Cisco IP Telephony SRND.

    pdf220p kieuoanh 11-08-2009 114 34   Download

  • This document describes the products and features used to build an IP telephony system, and it gives recommendations on how to combine those elements into an effective solution for your enterprise. However, this document does not contain specific implementation or configuration details for the products and features. For details about a particular product or feature, refer to the technical documentation available online at Cisco.com. (See Obtaining Documentation, page xv.)

    pdf334p kieuoanh 11-08-2009 106 27   Download

  • This chapter presents a high-level overview of several basic models that you can use in designing your IP telephony network. This overview provides some guidance with respect to when and why a particular design should be selected. Subsequent chapters delve into each network model in greater detail, beginning with the simplest model and building to increasingly complexity models.

    pdf262p mylinh 11-08-2009 125 26   Download

  • This document serves as an implementation guide for Cisco AVVID (Architecture for Voice, Video and Integrated Data) networks based on Cisco CallManager Release 3.0(5). With such a high level of industry interest regarding IP telephony, customers are aggressively pursuing Cisco solutions for both large and small networks. Solutions based on Cisco CallManager Release 3.0(5) allow Cisco to deliver large-scale IP telephony systems with many capabilities.

    pdf262p kieuoanh 11-08-2009 98 23   Download

  • Cisco IP Telephony Part 1 (CIPT1) v4.1 prepares you for installing, configuring, and maintaining a Cisco IP telephony solution. This course focuses primarily on Cisco CallManager, the call routing and signaling component for the Cisco IP telephony solution. This course includes lab activities in which you will perform postinstallation tasks and configure Cisco CallManager; configure gateways, gatekeepers, and switches; and build route plans to place intra- and intercluster Cisco IP Phone calls.

    pdf158p dieutan 17-05-2010 92 23   Download

  • This preface describes the purpose, intended audience, organization, and notational conventions for the Cisco IP Telephony QoS Design Guide. This document serves as an implementation guide for Voice over IP (VoIP) networks based on Cisco AVVID (Architecture for Voice, Video and Integrated Data). The goal of this document is to provide a blueprint for implementing the end-to-end Quality of Service (QoS) that is required for successful deployment of Cisco AVVID solutions in today’s enterprise environment....

    pdf242p phongthinh 07-08-2009 129 66   Download

  • Catalyst switch có thể cung cấp nguồn cho các IP phones, hình thành các kết nối trunking với IP phones, cung cấp một mức độ QoS cho các voice packets. Một thiết bị Cisco IP Phones cũng giống như tất cả các node khác trong hệ thống mạng ở chổ thiết bị phải có nguồn điện để hoạt động. Nguồn điện có thể đến từ hai nơi: Từ một nguồn AC adapter. Từ nguồn DC trích ra từ cáp mạng (data cable).

    doc3p mrantony 25-06-2010 137 54   Download

  • The merging of voice and data on a single network opens powerful new possibilities in communications. Only a fundamental understanding of both technologies will ensure you are equipped to maximise their full potential. Convergence Technologies for 3G Networks describes the evolution from cellular to a converged network that integrates traditional telecommunications and the technology of the Internet.

    pdf673p dieutan 17-05-2010 161 80   Download

  • 1. Tổng đài IP có phải còn được gọi là IP PABX hay IP Telephony không? Nghe 3 từ này loạn cả lên nhưng theo tôi hiểu loáng thoáng thì nó là một.

    doc5p congnghe08 21-07-2011 150 54   Download

  • This preface describes the purpose, intended audience, organization, and conventions for the Cisco IP Telephony Network Design Guide. This document serves as an implementation guide for Cisco AVVID (Architecture for Voice, Video and Integrated Data) networks based on Cisco CallManager Release 3.0(5). With such a high level of industry interest regarding IP telephony, customers are aggressively pursuing Cisco solutions for both large and small networks. Solutions based on Cisco CallManager Release 3.0(5) allow Cisco to deliver large-scale IP telephony systems with many capabilities....

    pdf262p phongthinh 07-08-2009 126 52   Download

  • Voice over Internet Protocol (VOIP), còn gọi là IP Telephony, đang nhanh chóng trở thành một thuật ngữ thông thuộc và công nghệ này đang đi sâu vào các doanh nghiệp, các tổ chức .VOIP được thiết kế để thay thế mạng lưới và công nghệ TDM bằng một mạng dữ liệu dựa trên giao thức mạng IP .Tiếng nói được số hóa và truyền đi trong các gói tin IP .

    doc65p teambqt 17-09-2013 78 31   Download

  • Một thiết bị Cisco IP Phones cũng giống như tất cả các node khác trong hệ thống mạng ở chổ thiết bị phải có nguồn điện để hoạt động. Nguồn điện có thể đến từ hai nơi: - Từ một nguồn AC adapter. - Từ nguồn DC trích ra từ cáp mạng (data cable). Trong cách thứ nhất, một adapter sẽ chuyển đổi điện AC 220V sang 48V DC cho phones hoạt động. Nếu bị cúp điện, IP phones sẽ không hoạt động.

    doc2p it_p0k3t 05-05-2011 54 14   Download

  • Tham khảo sách 'cisco ip telephony', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf108p thutrang 29-08-2009 68 11   Download

  • Will Your Structured Cabling be Suitable for IP Telephony? Discussions on the impact that a network's structured cabling system has on VoIP operation. Introduction IP Telephony, which includes the commonly known Voice over Internet Protocol (VoIP), is usually introduced into an enterprise as a cost saving measure. This is part of the convergence of data and voice (and video) on the local network so that it is under the control of the enterprise rather than relying on outside specialists.

    pdf4p qd-tek 28-04-2010 45 5   Download

  • Consider this scenario. You want to connect your IP Telephony network to the central office switch using E1 (or T1 PRI). Which of the following choices is an appropriate gateway selection?

    pdf11p xuankhuong 03-09-2009 64 4   Download

  • The business benefits compelling enterprises to assess and deploy IP telephony solutions are many.While many of the cost savings benefits still apply with reduced costs for moves, adds and changes (MACs), infrastructure consolidation, and international toll bypass, perhaps more compelling are the new applications now available.“Click to dial,”“follow-me,” unified messaging, and customized XML applications running on IP phones can change the way organizations function to gain advantage in the increasingly competitive business landscape....

    pdf0p mylinh 12-08-2009 18 2   Download

  • Tham khảo tài liệu 'ip telephony troubleshooting', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf37p halanh 15-08-2009 46 2   Download

  • This Solution Reference Network Design (SRND) publication is intended to provide a set of guidelines for designing, implementing, and deploying Voice and Video Enabled IPSec VPN (V3 PN) solutions. This SRND defines the comprehensive functional components required to build a Site-to-Site Enterprise Virtual Private Network (VPN) solution that can transport IP telephony and video.

    pdf160p duypha 11-08-2009 167 45   Download

  • TECHNOLOGIES SUPPORTING VoIP1 In this chapter, we discuss and review various standard and emerging coding, packetization, and transmission technologies that are needed to support voice transmission using the IP technologies. Limitations of the current technologies and some possible extensions or modifications to support high-quality—that is, near-PSTN grade—real-time voice communications services using IP are then presented. VOICE SIGNAL PROCESSING For traditional telephony or voice communications services, the base-band signal between 0.3 and 3.

    pdf17p huggoo 20-08-2010 57 13   Download

  • LEVELS OF TRAFFIC BEHAVIOUR So, what kind of traffic behaviour are we interested in for ATM, or IP? In Chapter 3 we looked at the flow of calls in a circuit-switched telephony network, and in Chapter 4 we extended this to consider the flow of cells through an ATM buffer. In both cases, the time between ‘arrivals’ (whether calls or cells) was given by a negative exponential distribution: that is to say, arrivals formed a Poisson process. But although the same source model is used, different types of behaviour are being modelled....

    pdf13p huggoo 20-08-2010 57 13   Download

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