voice and video over ip software
Overview of the PSTN and Comparisons to voice over IP
Ngày tải lên :
30/09/2013, 05:20
... 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, ...
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 ... will be IP, although this model also works if ATM is the underlying transport and IP rides across the
top. IP is so attractive as the packet infrastructure because of its ubiquitous nature and the...
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Voice over IP Applications and Services
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...
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Voice over IP Benefits and Applications
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...
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Voice over IP : Protocols and Standards
Ngày tải lên :
26/10/2013, 16:15
... 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...
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Thoại trên mạng VOI IP (voice over IP - VOIP)
Ngày tải lên :
31/08/2012, 10:00
... 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...
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Cisco Press 2000 - Voice over IP Fundamentals
Ngày tải lên :
14/09/2012, 11:42
... 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...
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Implementing Voice Over IP
Ngày tải lên :
15/09/2012, 10:04
... 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...
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Tìm hiểu VOICE OVER IP
Ngày tải lên :
09/10/2012, 16:40
... 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...
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Voice over IP Configuration Issues
Ngày tải lên :
30/09/2013, 05:20
...
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...
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Cisco Press 2000 - Voice over IP Fundamentals - Voice over IP Fundamentals
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...
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Implementing Voice Over IP - Preface
Ngày tải lên :
30/09/2013, 07:20
... 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...
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