how to configure voice over ip

... Datagram 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. ... user -to- network analog communication is Dual Tone Multi-Frequency (DTMF) . DTMF is known as in-band signaling because the tones are carried through the voice path. Figure 1-9 shows how DTMF tones ... nomenclature is used to describe the audio path. In IP networks, it is common and normal for packet loss to occur. In fact, Transmission Control Protocol/Internet Protocol (TCP /IP) was built to utilize...

Ngày tải lên: 30/09/2013, 05:20

Ngày tải lên: 24/03/2014, 01:21

... thanh to n sẽ rất có ích. Trong các tổ chức kinh doanh, sự quản lý 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 ... 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 ... hiện dịch vụ. ã Liên kết dịch vụ PSTN/VoIP bao gồm các gateway giữa các môi trờng mạng thoại và dữ liệu. ã Quản lý hệ thống, an to n, địa chỉ hoá và thanh to n phải đợc cung cấp, tốt nhất là...

Ngày tải lên: 31/08/2012, 10:00

... stepping 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 ... these new infrastructures to deploy new applications to their customers faster than they can on legacy equipment. Many of these new carriers use Voice over IP (VoIP) to lower their cost of operations ... players. 32 Readers familiar with IP networking might want to skip Chapter 7, " ;IP Tutorial." Similarly, voice- networking experts might want to skip Chapter 3, "Basic Telephony...

Ngày tải lên: 14/09/2012, 11:42

... tiers, as shown 3 VoIP GW translates time division multiplex (TDM) formatted voice signals into a real-time transport protocol (RTP) over a user datagram protocol (UDP) over IP packets. 4 The GK ... 67 References, 67 6 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, ... 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...

Ngày tải lên: 15/09/2012, 10:04

... http://helpinlinux.blogspot.com/2010/04/logical-volume-managementlvm-every.html How to configure LVM in linux rhel5 / Centos Logical Volume Management[LVM] Every system contains Physical Volums[PV]. Such as hard disks, partitions or external storages. Volume ... physical volume is still being used you will have to migrate the data to another physical volume using the #pvmove command. Then use the vgreducecommand to remove the physical volume. Current status ... 288.00M Spliting a Volume Group into two: We can split a Volume Group into two Volume Groups using the command #vgsplit We have one VG oracle with 4 PVs. We will split that VG oracle to oracle and another...

Ngày tải lên: 18/09/2012, 10:11

... 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 ... CorNet -IP, …ư Media Protocols: đi u khi n vi c truy n t i voice data qua môi tr ng m ngề ể ệ ề ả ườ ạ IP. Các lo i Media Protocols nh : RTP ( Real-Time Protocol) ,RTCP (RTP controlạ ư Protocol)...

Ngày tải lên: 09/10/2012, 16:40

... 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 ... 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 connections to Tokyo" ... connected to the PSTN. Summary This chapter covered two different VoIP customers. The enterprise customer (B.A.N.C.) used VoIP to not only consolidate its voice and data network, but also to take...

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 ... Configuration Protocol (DHCP). DHCP enables a device (a PC or an IP phone) to dynamically receive an IP address (that is, the IP address does not need to be statically configured into the device). ... 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 network is still consuming...

Ngày tải lên: 30/09/2013, 05:20

... 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 destination is unreachable. ... Dual-Tone Multi-Frequency (DTMF) tones as they traverse the Internet Protocol (IP) network if you use inappropriate encodings. Coding a voice stream—carried over a Real-Time Transport Protocol ... 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 care to make sure...

Ngày tải lên: 30/09/2013, 05:20

... these new infrastructures to deploy new applications to their customers faster than they can on legacy equipment. Many of these new carriers use Voice over IP (VoIP) to lower their cost of operations ... stepping 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 ... actual voice gateways throughout the industry. Audience Even though this book is written for anyone seeking to understand how to use IP to transport voice, its target audience comprises voice...

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 ... nature; oscillators had to be used to generate certain tones or signals, and oscilloscopes were used to measure the dial-tone delay, call setup time, and voice transmis- sion delay. However, as ... developed VoIP testbed are considered in Chapter 5. This testbed has been used both to proto- type and develop operational engineering rules to deliver high-quality VoIP service over an IP network. Chapters...

Ngày tải lên: 30/09/2013, 07:20

... is trying to call another 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 ... 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 ... QUESTION NO: 43 Which application enables stock brokerage firms to communicate to multiple remote offices simultaneously? A. IP Phone B. IP Centrex C. Toll Bypass D. Multi-tenant E. Hoot and...

Ngày tải lên: 18/10/2013, 18:15

... network to do business, you find that the traffic between the sites is a bit lower than the CIR even at peak. You have heard that Voice over IP is not as efficient as Voice over a Layer 2 protocol, ... $1$IM1E$54nbR7ceGJQHXdqCBMoTU. ! ip subnet-zero no 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= 11/06/01 Date of Issue: 02-01-2000 Voice over IP/ Frame Relay Lab Scenarios by Chris Ackerman Lab Scenario 1 - Voice over IP Objective Configuration of Router A Configuration...

Ngày tải lên: 19/10/2013, 02:15

... Series This chapter shows you how to configure Voice over IP (VoIP) on the Cisco 3600 series. For a description of the commands used to configure Voice over IP, refer to the Voice- Related Commands” ... about how to select and configure the appropriate QoS tools to optimize voice traffic on your network. 2 Configure Frame Relay for Voice over IP (Optional) If you plan to run Voice over IP over Frame ... 555-1000 10.1.2.2 SourceDestination 10.1.1.2 Voice port 1/0/0 Voice port 1/0/0 IP cloud Configure Voice over IP using a Trunk Connection Configuring Voice over IP for the Cisco 3600 Series VC-35 Configure VAD for a VoIP Dial Peer To...

Ngày tải lên: 22/10/2013, 09:15

... key 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 ... Products, Services and Issues | Voice over IP (Lecture by Dr Jain) | Voice over ATM | H.323 and Associated Protocols | VOIP References | Books on Voice over IP and IP Telephony Other Reports on ... unique within a Voice Over IP : Protocols and Standards http://www.cis.ohio-state.edu/~jain/cis788-99/voip_protocols/index.html (5 of 20) [2/7/2000 10:47:54 AM] Voice over IP : Protocols and Standards Rakesh...

Ngày tải lên: 26/10/2013, 16:15

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Ngày tải lên: 21/12/2013, 04:18

Ngày tải lên: 17/01/2014, 06:20