dịch vụ dùng voice over ip

Thoại trên mạng VOI IP (voice over IP - VOIP)

... hợp dùng dịch vụ Internet hay Intranet. Công nghệ VoIP có bốn lợi ích chủ yếu:ã Giảm chi phí. Một giá cớc chung có thể thực hiện đợc với mạng Internet và do đó tiết kiệm đáng kể cho dịch vụ ... cả dịch vụ thoại và dữ liệu sử dụng VoIP. Việc sử dụng thống nhất giao thức IP cho tất cả các ứng dụng hứa hẹn giảm bớt phức tạp và tăng cờng tính mềm dẻo. Các phơng tiện liên quan nh dịch vụ ... việc kết hợp hợp dịch vụ, trong đó cho phép thoại và fax đợc truyền qua các mạng IP. Thực tế, các ứng dụng qua mạng IP nh video và multimedia cũng không còn xa nữa.cho VoIP, các lợi ích trong...

4
1,804
19

Cisco Press 2000 - Voice over IP Fundamentals

Danh mục: Kỹ thuật lập trình

... all the various VoIP components set up calls, tear down calls, and offer services. Chapter 14, " ;Voice over IP Configuration Issues," and Chapter 15, " ;Voice over IP Applications ... into the voice realm. They also act as a good primer for those in specific voice areas that want to brush up on various other voice- networking protocols. Chapter 6, " ;Voice over IP Benefits ... 1. Overview of the PSTN and Comparisons to Voice over IP The Public Switched Telephone Network (PSTN) has been evolving ever since Alexander Graham Bell made the first voice transmission over...

Implementing Voice Over IP

Danh mục: Kỹ thuật lập trình

... mexvPREFACEIn general, voice transmission over the Internet protocol (IP) , or VoIP, meanstransmission of real-time voice signals and associated call control information over an IP- based (public or ... 676 VoIP Deployment in Enterprises 68 IP- Based Endpoints: Desktop and Conference Phones, 69 IP- PBX, IP Centrex, and IP- Based PBX Tie Lines, 71 IP- VPN and VoIP for Tele-Workers, 77Web-Based Call ... tiers, as shown3 VoIP GW translates time division multiplex (TDM) formatted voice signals into a real-timetransport protocol (RTP) over a user datagram protocol (UDP) over IP packets.4 The GK...

Tìm hiểu VOICE OVER IP

Danh mục: Quản trị mạng

... 16 [VOICE OVER IP] CH NG I: T NG QUAN V VOIPƯƠ Ổ Ề1. Gi i thi u chung v VoIP.ớ ệ ề Voice over Internet Protocol (VoIP) là m t công ngh cho phép truy n tho iộ ệ ề ạ s d ng giao th c m ng IP, ... nói (Voice Compression)ọPage 8 [VOICE OVER IP] 3.2 B giao th c ộ ứ SIP.SIP: (Session Initiation Protocol) đ c phát tri n b i IETF ( Internetượ ể ở Engineering Task Force) MMUSIC ( Multiparty ... ể th k t n i tr c ti pv i các ể ế ố ự ế ớ VoIP server4. Các đ nh nghĩa liên quan đ n VOIPị ế• VoIP – Voice over Internet Protocol (còn g i là IP Telephony, Internetọ telephony và Digital...

Chiến lược kinh doanh của công ty TNHH Thương mại - dịch vụ dụng cụ công nghệ mới đến năm 2013

Danh mục: Quản trị kinh doanh

Overview of the PSTN and Comparisons to voice over IP

Danh mục: Kỹ thuật lập trình

... 1. Overview of the PSTN and Comparisons to Voice over IP The Public Switched Telephone Network (PSTN) has been evolving ever since Alexander Graham Bell made the first voice transmission over ... running over IP do not have to be known. IP simply transports the data end to end, with no real interest in the payload. NOTE To provide the proper prioritization on a congested IP network, the IP ... normally due to an overlay . An overlay can result in next-door neighbors having different area codes. An overlay is when a region with an existing area code has another area code "overlayed."...

Voice over IP Applications and Services

Danh mục: Kỹ thuật lập trình

... session target ipv4:192.168.102.2 ! dial-peer voice 2 voip description "calls to Denver office" destination-pattern 5…. ! dial-peer voice 3 voip description "calls to IP Phones ... matched against a VoIP dial-peer to complete the call. ! session target ipv4:192.168.103.2 ! voice- port 1/0:3 connection trunk 999 ! dial-peer voice 1 voip description "trunk/opx ... target ipv4:192.168.103.1 dial-peer voice 1 voip destination-pattern 77. ! dial-peer voice 2 pots description "off-premise extension on DS0 #9 from Chicago" 228CCM Overview...

Voice over IP Benefits and Applications

Danh mục: Kỹ thuật lập trình

... II: Voice over IP Technology Chapter 6 Voice over IP Benefits and Applications Chapter 7 IP Tutorial Chapter 8 VoIP: An In-Depth Analysis Chapter 9 Quality of Service Chapter 6. Voice over ... 6-11. ICW Call-Flow 104The voice network uses multiplexers to connect voice and data networks across one T1 circuit. When voice is not being used, however, the voice network is still consuming ... packet-based voice network. The following issues and applications are addressed: • Benefits of Voice over IP (VoIP), including cost savings, single infrastructure savings, and new applications • Using...

Voice over IP Configuration Issues

Danh mục: Kỹ thuật lập trình

... the voice gateway to hunt through dial-peers to ensure delivery of a phone call to a valid IP gateway. • Call failover—Enables an IP call to be routed to a different location if the first IP ... encodings. Multiple D/A conversions also can affect voice quality. Where D/A conversions really rear their head, however, is when modems or some other data transmission over voice is handled. ... VoIP network, it did cover the basics of Cisco IOS configuration for VoIP. It also explained the various components a network administrator must consider before designing and deploying a VoIP...

Cisco Press 2000 - Voice over IP Fundamentals - Voice over IP Fundamentals

Danh mục: Kỹ thuật lập trình

... Packet Telephony Packet Voice Network Overview VSC Architecture and Operations VSC Implementation Summary IV: Voice over IP Applied 14. Voice over IP Configuration Issues ... all the various VoIP components set up calls, tear down calls, and offer services. Chapter 14, " ;Voice over IP Configuration Issues," and Chapter 15, " ;Voice over IP Applications ... Services Service Provider Services Summary II: Voice over IP Technology 6. Voice over IP Benefits and Applications Key Benefits of VoIP Packet Telephony Call Centers Service Provider...

Implementing Voice Over IP - Preface

Danh mục: Kỹ thuật lập trình

... PREFACEIn general, voice transmission over the Internet protocol (IP) , or VoIP, meanstransmission of real-time voice signals and associated call control information over an IP- based (public or ... embeddedin them. In this book, I use VoIP and IP telephony synonymously, most of thetimes.This book grew out of my participation in many VoIP-related projects over the past several years. Some of ... implement the VoIP service. Manyof the recent VoIP-related projects in the enterprise and public network indus-tries involve specifying a VoIP service design or upgrading an existing VoIPservice...

9E0-431 (CVOICE) Cisco Voice Over IP Version 3.0

Danh mục: Chứng chỉ quốc tế

... interface serial 3/2 ip rsvp bandwidth 2 B. dial-peer voice 1000 voip max-conn 2 C. dial-peer voice 1000 voip max-concurrent 2 D. dial-peer voice 1000 voip ip rsvp neighbor 2 9E0 ... user over a VoIP network and gets a busy tone instead of a dial tone. What command should you use to troubleshoot the problem? A. show voice dsp B. show voice connection C. show voice ... complexity of the voice interface between the IP network and the PBX. A. Fake B. True Answer: A QUESTION NO: 15 Which will provide your IP Phones with an IP Address? A. The...

Voice over IP/Frame Relay Lab Scenarios

Danh mục: Quản trị mạng

... that Voice over IP is not as efficient as Voice over a Layer 2 protocol, so you decide to take advantage of your already existing Frame-Relay network to transport voice. Figure 1. Voice Over ... $1$IM1E$54nbR7ceGJQHXdqCBMoTU.! ip subnet-zerono ip domain-lookup!dial-peer voice 101 voip destination-pattern 1002 ip precedence 5 session target ipv4:172.16.16.2!dial-peer voice 201 pots destination-pattern ... /?Issue=27&IssueDate=02-01-2000&CP= 11/06/01Date of Issue: 02-01-2000 Voice over IP/ Frame Relay Lab Scenariosby Chris Ackerman Lab Scenario 1 - Voice over IP Objective Configuration of Router A Configuration...

Configuring Voice over IP for the Cisco 3600 Series

Danh mục: Hóa học - Dầu khí

... Relay for Voice over IP (Optional) If you plan to run Voice over IP over Frame Relay, you need to take certain factorsinto consideration when configuring Voice over IP for it to run smoothly over ... 3clockrate 128000 Voice over IP Configuration Task ListVC-16 Voice, Video, and Home Applications Configuration Guide Voice over IP Configuration Task ListTo configure Voice over IP on the Cisco ... to use Voice over IP, you must first:•Establish a working IP network. For more information about configuring IP, refer to the IP Overview,” “Configuring IP Addressing,” and “Configuring IP Services”...

Thực hiện chất lượng dịch vụ trong các mạng IP (P1)

Danh mục: Hóa học - Dầu khí

... pursue the goal of optimizing theprotocol stack. A protocol stack of IP over ATM over SDH over Wavelength Division Multiplexing (WDM) is not optimal, neitherfrom CAPEX nor from an OPEX point ... maintenance personnel.Light protocol stacks such as IP over 802.X in copper-basednetworks or Internet Protocol/Multi-Protocol Label Switching (IP/ MPLS) over WDM have received lots of deserved attentionon ... network, allowing for cost-efﬁcientdesign of networking equipment. IP is a good convergence layer inthe sense that it can be run over multiple link layer technologies,including ATM. On the applications...

Thực hiện chất lượng dịch vụ trong các mạng IP (P2)

Danh mục: Hóa học - Dầu khí

... service, made possible by the Internet,is point-to-point real-time communication over the Internet. Voice over IP (VoIP) clients for PCs can be downloaded from the Inter-net that contain audio and/or ... end-to-end delivery of a voice sample;• end-to-end delivery of a talkspurt (a sequence of voice samplesbounded by absence of voice signal);• end-to-end delivery of entire voice content of a telephone ... a VoIP call with application sharing, for example, the followingdistinct service event types can be enumerated:• connection set-up signalling (e.g., H.323 or SIP);• transmission of VoIP media...