voice and video over ip

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Ngày tải lên: 23/12/2013, 04:17

Ngày tải lên: 22/06/2014, 22:20

... which it and other voice networks are evolving to the point at which they combine data, video, and voice. The Beginning of the PSTN The first voice transmission, sent by Alexander Graham Bell, ... Protocol (UDP) /IP header to provide timestamping . RTP runs atop UDP and IP and is commonly noted as RTP/UDP /IP. RTP is currently the cornerstone for carrying real-time traffic across IP networks. ... covers how they are maintained and deployed. ã In late 1998, the IETF put IPDC and SGCP in a room and out popped MGCP. MGCP is basically SGCP with a few additions for OAM&P. MGCP is covered...

Ngày tải lên: 30/09/2013, 05:20

... 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 ... interface FastEthernet 1/0/0 ip address 192.168.100.1 255.255.255.0 ipx network 100 ! interface FastEthernet 1/0/1 225 Chapter 15. Voice over IP Applications and Services As enterprise...

Ngày tải lên: 30/09/2013, 05:20

... 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 ... network) and ICW. Figure 6-11. ICW Call-Flow 104 The voice network uses multiplexers to connect voice and data networks across one T1 circuit. When voice is not being used, however, the voice ... voice network. The following issues and applications are addressed: ã Benefits of Voice over IP (VoIP), including cost savings, single infrastructure savings, and new applications ã Using a packet...

Ngày tải lên: 30/09/2013, 05:20

... hardware standards for internet telephony. See Also: Voice over IP - Products, Services and Issues | Voice over IP (Lecture by Dr Jain) | Voice over ATM | H.323 and Associated Protocols | VOIP References ... protocols and standards ● References ● List of Acronyms ● INTRODUCTION Voice over IP (VOIP) uses the Internet Protocol (IP) to transmit voice as packets over an IP network. So VOIP can be achieved ... Provides call signaling and registration H.245 Negotiates the usage of the media channels SIP IETF standard for providing voice over IP Voice Over IP : Protocols and Standards http://www.cis.ohio-state.edu/~jain/cis788-99/voip_protocols/index.html...

Ngày tải lên: 26/10/2013, 16:15

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Ngày tải lên: 23/06/2014, 01:20

Ngày tải lên: 16/10/2014, 10:36

... 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 thời gian dài hơn đợc mong đợi ... trên cơ sở SNMP có thể đợc cung cấp cho cả dịch vụ thoại và dữ liệu sử dơng VoIP. ViƯc sư dơng thèng nhÊt giao thøc IP cho tất cả các ứng dụng hứa hẹn giảm bớt phức tạp và tăng cờng tính mềm ... luận Mạng Internet cùng giao thức TCP /IP đà trở thành một động lực tốt thúc đẩy các công nghệ mới, và khả năng truyền thoại thời gian thực qua các mạng IP chỉ là một trong những ứng dụng mới...

Ngày tải lên: 31/08/2012, 10:00

... understand how 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 ... Chapter 1, "Overview of the PSTN and Comparisons to Voice over IP, " contrasts the similarities and differences between traditional TDM networks and networks running packetized voice. Chapter ... 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 and...

Ngày tải lên: 14/09/2012, 11:42

... 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, 77 Web-Based Call and Contact Centers, ... During a VoIP Session, 51 Voice Coding and Processing Delay, 52 Voice Envelop Delay, 53 Voice Packet Loss, 55 Voice Frame Unpacking and Packet Delay Jitter BuÔer, 55 Management of Voice Quality ... VoIP 15 Voice Signal Processing, 15 Low-Bit-Rate Voice Signal Encoding, 16 Voice Signal Framing and Packetization, 16 Packet Voice Transmission, 18 Mechanisms and Protocols, 18 Packet Voice BuÔering...

Ngày tải lên: 15/09/2012, 10:04

... 16 [VOICE OVER IP] CH NG I: T NG QUAN V VOIPƯƠ Ổ Ề 1. 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)ọ Page 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 ... có m t m ng nh sau: ộ ạ ư Page 7 [VOICE OVER IP] Ph ng th c ho t đ ng c a ươ ứ ạ ộ ủ SIP network : SIP là mô hình m ng s d ng ki u k t n i 3 h ng ( 3 way handshakeạ ử ụ ể ế ố ướ method) trên...

Ngày tải lên: 09/10/2012, 16:40

... considerations, such as single- and two-stage dialing, and their ramifications on voice dialing plans. This chapter also covered ways in which single- and two-stage dialing affect users, and it provided details ... no single entity controls the voice and data network, however, it is possible in single- and two-stage dialing to have multiple compression cycles, which affect voice quality. You must take great ... the voice gateway to hunt through dial-peers to ensure delivery of a phone call to a valid IP gateway. ã Call failoverEnables an IP call to be routed to a different location if the first IP...

Ngày tải lên: 30/09/2013, 05:20

... understand how 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 ... Packet Telephony Packet Voice Network Overview VSC Architecture and Operations VSC Implementation Summary IV: Voice over IP Applied 14. Voice over IP Configuration Issues ... 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...

Ngày tải lên: 30/09/2013, 05:20

... PREFACE In general, voice transmission over the Internet protocol (IP) , or VoIP, means transmission of real-time voice signals and associated call control information over an IP- based (public or ... embedded in them. In this book, I use VoIP and IP telephony synonymously, most of the times. This book grew out of my participation in many VoIP-related projects over the past several years. Some of ... quickly and cost- eÔectively. Chapter 2 reviews the emerging protocols, hardware, and related standards that can be used to implement the VoIP service. These include the bandwidth e‰cient voice...

Ngày tải lên: 30/09/2013, 07:20