B.Eng. (Hons.) Telecommunications. Examinations for / Semester 1
|
|
- Sheena Hood
- 5 years ago
- Views:
Transcription
1 B.Eng. (Hons.) Telecommunications Cohort: BTEL/12/FT Examinations for / Semester 1 MODULE: IP TELEPHONY MODULE CODE: TELC 3107 Duration: 3 Hours Instructions to Candidates: 1. Answer all questions. 2. Questions may be answered in any order but your answers must show the question number clearly. 3. Always start a new question on a fresh page. 4. All questions carry equal marks. 5. Total marks 100. This question paper contains 5 questions and 10 pages. Page 1 of 10
2 QUESTION 1: (20 MARKS) SIP ANSWER ALL QUESTIONS (a) State the transport protocols used by the SIP protocol. (4 marks) (b) Assume that your boss ask you to set up a low cost VoIP infrastructure solution within the premises of your company (around 200 employees) that will enable employees to use their smartphones to access VoIP services without going through the 3G cellular network. Describe briefly how this objective can be achieved. (6 marks) (c) Consider the VoIP setting illustrated in figure 1.1. Figure 1.1 Page 2 of 10
3 (i) List the messages labels from (1) to (12). (ii) Differentiate between requests and responses messages in (i). The message (1) code is detailed as follows: INVITE SIP/2.0 Via: SIP/2.0/UDP ; branch=z9hg4bk776asdhds Max-Forwards: 70 To: John From: Mark Call-ID: CSeq: INVITE Content-Type: application/sdp Content-Length: 228 v = 0 o = mark IN IP s =session SDP c = IN IP t =0 0 m = audio RTP/AVP 0 a = rtpmap: 0 PCMU/8000 (iii) What is the difference between the Call-ID and the CSeq fields? (iv) Explain the purpose of the parameter branch=z9hg4bk776asdhds in this message? (v) In the last 2 lines of the message what do and PCMU/8000 stand for? (10 marks) Page 3 of 10
4 QUESTION 2: (20 MARKS) H.323 (a) Figure 2.1 depicts the protocol stack for H.323. You will notice that H.3.23 splits into H.225 RAS Signalling, Call signalling and Control Signalling. (i) Why is it important to separate call signalling from control signalling in IP Telephony? Figure 2.1 (b) Amongst the components in an H.323 architecture, there are the Gatekeepers and Control Units. (i) What is the difference between the Gatekeeper (GK) and the Multipoint Control Unit (MCU) regarding their functionalities? (ii) How is the CODEC information negotiated in H.323? Page 4 of 10
5 (c) Draw a call flow diagram to show the different message exchanges in a direct call signalling with 2 terminals and one Gatekeeper as portrayed in figure 2.2. Figure 2.2 (4 marks) (d) Consider now a Gatekeeper routed call signalling. (i) Draw a call flow diagram to show the different message exchanges in a GK routed call signalling with 2 terminals and one Gatekeeper. (ii) Use a different colour on the same diagram answered in (i) to show message exchanges assuming there is request for bandwidth change. (6 marks) Page 5 of 10
6 QUESTION 3: (20 MARKS) MGCP (a) What would be the role for gateways if MGCP can sustain signalling between different types of Networks, for example a PSTN and a VoIP? (b) MGCP is meant to interconnect networks with different signalling systems. Explain why neither H.323 nor SIP are efficient to allow this through extensions. (c) Is the MGCP close to the IP philosophy? Discuss. (d) In what ways is the use of MGCP particular attractive to operators and hardware manufacturers? Page 6 of 10
7 QUESTION 4: (20 MARKS) RTP/RTCP (a) What are the quality issues in IP telephony that prompted the need for another Transport protocol for voice? (b) Compare the functionalities between the RTP and RTCP protocols (c) What are the functions of a translator and a mixer in a VoIP infrastructure? Illustrate your answer with the help of a diagram. (d) For a 16 kbps DVI4 audio conference with 100 participants (10 senders, 90 receivers) with an average packet size 100 bytes. (i) Calculate the period between 2 RTCP packets for a sender. (ii) Calculate the period between 2 RTCP packets for a receiver. Page 7 of 10
8 QUESTION 5: (20 MARKS) CODEC / Dial Plan (a) Voice quality is quite subjective. The 2 popular voice quality scales set by the ITU are the Mean Option Score (MOS) and the Perceptual Speech Quality Measurement (PSQM). Describe the MOS and the PSQM systems. (b) Assume the following protocols headers format. 40 bytes for IP (20 bytes) / User Datagram Protocol (UDP) (8 bytes) / Real-Time Transport Protocol (RTP) (12 bytes) headers. Compressed Real-Time Protocol (crtp) reduces the IP/UDP/RTP headers to 2 or 4 bytes (crtp is not available over Ethernet). 6 bytes for Multilink Point-to-Point Protocol (MP) or Frame Relay Forum (FRF).12 Layer 2 (L2) header. 1 byte for the end-of-frame flag on MP and Frame Relay frames. 18 bytes for Ethernet L2 headers, including 4 bytes of Frame Check Sequence (FCS) or Cyclic Redundancy Check (CRC). Page 8 of 10
9 CODEC information Table 5.1 Bandwidth requirements CODEC Bit rate(kbps) Codec sample size(b) Code sample interval (ms) MOS Voice payload size (B) Voice payload size(ms) PPS Bandwidth MP or FRF.12 (kbps) Bandwidth w/crtp MP or FRF.12 (kbps) Bandwidth Ethernet (kbps) G G Calculate the bandwidths for G.711 and G.729 as per the table 5.1. (c) Whenever we deal with external route configuration in a VoIP setting, we need to consider the following: Route patterns Route lists Route groups Route groups devices (i) Define the above routes. (ii) In Cisco Call Manager, what is the difference between On-Cluster Calls and Off-Cluster Calls? (d) There are actually different dial plan design guidelines according to the geographical location of the VoIP infrastructure as follows. Single Site Enterprise Multisite with distributed call processing Multisite with centralised call processing Page 9 of 10
10 (i) How do the above site configurations impact on the dial plan design? (ii) One of the advanced tools in Call Manager Dial Plan Tool Kit is the Automated Alternate Routing (AAR). Briefly describe the mechanism of the AAR. ***END OF QUESTION PAPER*** Page 10 of 10
Voice over IP (VoIP)
Voice over IP (VoIP) David Wang, Ph.D. UT Arlington 1 Purposes of this Lecture To present an overview of Voice over IP To use VoIP as an example To review what we have learned so far To use what we have
More informationTSIN02 - Internetworking
Lecture 8: SIP and H323 Litterature: 2004 Image Coding Group, Linköpings Universitet Lecture 8: SIP and H323 Goals: After this lecture you should Understand the basics of SIP and it's architecture Understand
More informationZ24: Signalling Protocols
Z24: Signalling Protocols Mark Handley H.323 ITU protocol suite for audio/video conferencing over networks that do not provide guaranteed quality of service. H.225.0 layer Source: microsoft.com 1 H.323
More informationVoIP Basics. 2005, NETSETRA Corporation Ltd. All rights reserved.
VoIP Basics Phone Network Typical SS7 Network Architecture What is VoIP? (or IP Telephony) Voice over IP (VoIP) is the transmission of digitized telephone calls over a packet switched data network (like
More informationVoIP. ALLPPT.com _ Free PowerPoint Templates, Diagrams and Charts
VoIP ALLPPT.com _ Free PowerPoint Templates, Diagrams and Charts VoIP System Gatekeeper: A gatekeeper is useful for handling VoIP call connections includes managing terminals, gateways and MCU's (multipoint
More informationBEng. (Hons) Telecommunications. Examinations for / Semester 2
BEng. (Hons) Telecommunications Cohort: BTEL/16B/FT Examinations for 2016 2017 / Semester 2 Resit Examinations for BTEL/15B/FT MODULE: NETWORKS MODULE CODE: CAN 1102C Duration: 2 ½ hours Instructions to
More informationReal-time Services BUPT/QMUL
Real-time Services BUPT/QMUL 2017-05-27 Agenda Real-time services over Internet Real-time transport protocols RTP (Real-time Transport Protocol) RTCP (RTP Control Protocol) Multimedia signaling protocols
More informationMedia Communications Internet Telephony and Teleconference
Lesson 13 Media Communications Internet Telephony and Teleconference Scenario and Issue of IP Telephony Scenario and Issue of IP Teleconference ITU and IETF Standards for IP Telephony/conf. H.323 Standard
More informationMultimedia Applications. Classification of Applications. Transport and Network Layer
Chapter 2: Representation of Multimedia Data Chapter 3: Multimedia Systems Communication Aspects and Services Multimedia Applications and Communication Protocols Quality of Service and Resource Management
More informationChapter 11: Understanding the H.323 Standard
Página 1 de 7 Chapter 11: Understanding the H.323 Standard This chapter contains information about the H.323 standard and its architecture, and discusses how Microsoft Windows NetMeeting supports H.323
More informationAbstract. Avaya Solution & Interoperability Test Lab
Avaya Solution & Interoperability Test Lab Application Notes for Configuring SIP Trunking between Sotel IP Services SIP Edge Advanced SIP Trunking Solution and an Avaya IP Office Telephony Solution Issue
More informationReal Time Protocols. Overview. Introduction. Tarik Cicic University of Oslo December IETF-suite of real-time protocols data transport:
Real Time Protocols Tarik Cicic University of Oslo December 2001 Overview IETF-suite of real-time protocols data transport: Real-time Transport Protocol (RTP) connection establishment and control: Real
More informationProvide a generic transport capabilities for real-time multimedia applications Supports both conversational and streaming applications
Contents: Real-time Transport Protocol (RTP) Purpose Protocol Stack RTP Header Real-time Transport Control Protocol (RTCP) Voice over IP (VoIP) Motivation H.323 SIP VoIP Performance Tests Build-out Delay
More informationTroubleshooting Voice Over IP with WireShark
Hands-On Troubleshooting Voice Over IP with WireShark Course Description Voice over IP is being widely implemented both within companies and across the Internet. The key problems with IP voice services
More informationApplication Notes for Configuring SIP Trunking between Cincinnati Bell Any Distance evantage and Avaya IP Office Issue 1.0
Avaya Solution & Interoperability Test Lab Application Notes for Configuring SIP Trunking between Cincinnati Bell Any Distance evantage and Avaya IP Office Issue 1.0 Abstract These Application Notes describe
More informationApplication Notes for Configuring SIP Trunking between Bandwidth.com SIP Trunking Solution and an Avaya IP Office Telephony Solution Issue 1.
Avaya Solution & Interoperability Test Lab Application Notes for Configuring SIP Trunking between Bandwidth.com SIP Trunking Solution and an Avaya IP Office Telephony Solution Issue 1.0 Abstract These
More informationIntroduction to VoIP. Cisco Networking Academy Program Cisco Systems, Inc. All rights reserved. Cisco Public. IP Telephony
Introduction to VoIP Cisco Networking Academy Program 1 Requirements of Voice in an IP Internetwork 2 IP Internetwork IP is connectionless. IP provides multiple paths from source to destination. 3 Packet
More informationAbstract. Avaya Solution & Interoperability Test Lab
Avaya Solution & Interoperability Test Lab Application Notes for Configuring SIP Trunking between the PAETEC Broadsoft based SIP Trunking Solution and an Avaya IP Office Telephony Solution Issue 1.0 Abstract
More informationApplication Notes for Configuring SIP Trunking between McLeodUSA SIP Trunking Solution and an Avaya IP Office Telephony Solution Issue 1.
Avaya Solution & Interoperability Test Lab Application Notes for Configuring SIP Trunking between McLeodUSA SIP Trunking Solution and an Avaya IP Office Telephony Solution Issue 1.1 Abstract These Application
More informationApplication Notes for Configuring SIP Trunking between Global Crossing SIP Trunking Service and an Avaya IP Office Telephony Solution Issue 1.
Avaya Solution & Interoperability Test Lab Application Notes for Configuring SIP Trunking between Global Crossing SIP Trunking Service and an Avaya IP Office Telephony Solution Issue 1.0 Abstract These
More informationMultimedia Networking Communication Protocols
Multimedia Networking Communication Protocols Signalling Demands in Real-Time Systems Real-Time Transport Conferencing: VoIP & VCoIP H.323 SIP/SDP/SAP/IMG Signalling Demands Media Types can be signalled
More informationPilsung Taegyun A Fathur Afif A Hari A Gary A Dhika April Mulya Yusuf Anin A Rizka B Dion Siska Mirel Hani Airita Voice over Internet Protocol Course Number : TTH2A3 CLO : 2 Week : 7 ext Circuit Switch
More informationReal-time Services BUPT/QMUL
Real-time Services BUPT/QMUL 2015-06-02 Agenda Real-time services over Internet Real-time transport protocols RTP (Real-time Transport Protocol) RTCP (RTP Control Protocol) Multimedia signaling protocols
More informationKommunikationssysteme [KS]
Kommunikationssysteme [KS] Dr.-Ing. Falko Dressler Computer Networks and Communication Systems Department of Computer Sciences University of Erlangen-Nürnberg http://www7.informatik.uni-erlangen.de/~dressler/
More informationH.323. Definition. Overview. Topics
H.323 Definition H.323 is a standard that specifies the components, protocols and procedures that provide multimedia communication services real-time audio, video, and data communications over packet networks,
More informationMedia Path. Feature Information for Media Path
The feature allows you to configure the path taken by media after a call is established. You can configure media path in the following modes: Media flow-through Media flow-around Media anti-trombone Feature
More informationImplementing Cisco Voice Communications & QoS (CVOICE) 8.0 COURSE OVERVIEW: WHO SHOULD ATTEND: PREREQUISITES: Running on UC 9.
Implementing Cisco Voice Communications & QoS (CVOICE) 8.0 COURSE OVERVIEW: Running on UC 9.x Software Implementing Cisco Voice Communications and QoS (CVOICE) v8.0 is a 5-day training program that teaches
More informationApplication Notes for Configuring SIP Trunking between TelePacific SmartVoice SIP Connect and an Avaya IP Office Telephony Solution 1.
Avaya Solution & Interoperability Test Lab Application Notes for Configuring SIP Trunking between TelePacific SmartVoice SIP Connect and an Avaya IP Office Telephony Solution 1.0 Abstract These Application
More informationBasic Architecture of H.323 C. Schlatter,
Basic Architecture of H.323 C. Schlatter, schlatter@switch.ch 2003 SWITCH Agenda Background to H.323 Components of H.323 H.323 Protocols Overview H.323 Call Establishment 2003 SWITCH 2 Background to H.323
More informationMohammad Hossein Manshaei 1393
Mohammad Hossein Manshaei manshaei@gmail.com 1393 Voice and Video over IP Slides derived from those available on the Web site of the book Computer Networking, by Kurose and Ross, PEARSON 2 Multimedia networking:
More informationOutline Overview Multimedia Applications Signaling Protocols (SIP/SDP, SAP, H.323, MGCP) Streaming Protocols (RTP, RTSP, HTTP, etc.) QoS (RSVP, Diff-S
Internet Multimedia Architecture Outline Overview Multimedia Applications Signaling Protocols (SIP/SDP, SAP, H.323, MGCP) Streaming Protocols (RTP, RTSP, HTTP, etc.) QoS (RSVP, Diff-Serv, IntServ) Conclusions
More informationCisco Unified MeetingPlace Integration
CHAPTER 14 This chapter covers system-level design and implementation of Cisco Unified MeetingPlace 5.4 in a Cisco Unified Communications Manager 5.x environment. The following aspects of design and configuration
More informationMultimedia Systems Multimedia Networking Part II Mahdi Amiri December 2015 Sharif University of Technology
Course Presentation Multimedia Systems Multimedia Networking Part II Mahdi Amiri December 2015 Sharif University of Technology Multimedia Networking, QoS Multimedia Over Today s Internet TCP/UDP/IP: best-effort
More informationa. Draw a network diagram, showing how a telephone in the US would make calls to a telephone on Deception Island. (15 points).
TSM 350 IP Telephony Fall 2004 E Eichen Exam 1 (Midterm): November 10 Solutions 1 True or False: a Call signaling in a SIP network is routed on a hop-by-hop basis, while call signaling in an H323 network
More informationTransporting Voice by Using IP
Transporting Voice by Using IP National Chi Nan University Quincy Wu Email: solomon@ipv6.club.tw 1 Outline Introduction Voice over IP RTP & SIP Conclusion 2 Digital Circuit Technology Developed by telephone
More informationInvestigation of Algorithms for VoIP Signaling
Journal of Electrical Engineering 4 (2016) 203-207 doi: 10.17265/2328-2223/2016.04.007 D DAVID PUBLISHING Todorka Georgieva 1, Ekaterina Dimitrova 2 and Slava Yordanova 3 1. Telecommunication Department,
More informationSeminar report IP Telephony
A Seminar report On IP Telephony Submitted in partial fulfillment of the requirement for the award of degree of Bachelor of Technology in Computer Science SUBMITTED TO: www.studymafia.org SUBMITTED BY:
More informationProblem verification during execution of H.323 signaling
Problem verification during execution of H.323 signaling 1 ESAD KADUSIC & 2 NATASA ZIVIC & 3 NARCIS BEHLILOVIC & 4 ALIJA VEGARA 1,3,4 Faculty of Electrical Engineering in Sarajevo Zmaja od Bosne, 71 000
More informationPhillip D. Shade, Senior Network Engineer. Merlion s Keep Consulting
Phillip D. Shade, Senior Network Engineer Merlion s Keep Consulting 1 Phillip D. Shade (Phill) phill.shade@gmail.com Phillip D. Shade is the founder of Merlion s Keep Consulting, a professional services
More informationINTERFACE SPECIFICATION SIP Trunking. 8x8 SIP Trunking. Interface Specification. Version 2.0
8x8 Interface Specification Version 2.0 Table of Contents Introduction....3 Feature Set....3 SIP Interface....3 Supported Standards....3 Supported SIP methods....4 Additional Supported SIP Headers...4
More informationSynopsis of Basic VoIP Concepts
APPENDIX B The Catalyst 4224 Access Gateway Switch (Catalyst 4224) provides Voice over IP (VoIP) gateway applications for a micro branch office. This chapter introduces some basic VoIP concepts. This chapter
More informationMobile MOUSe CONVERGENCE+ ONLINE COURSE OUTLINE
Mobile MOUSe CONVERGENCE+ ONLINE COURSE OUTLINE COURSE TITLE CONVERGENCE+ COURSE DURATION 13 Hour(s) of Self-Paced Interactive Training COURSE OVERVIEW This course will prepare you to design, implement
More informationOverview. Slide. Special Module on Media Processing and Communication
Overview Review of last class Protocol stack for multimedia services Real-time transport protocol (RTP) RTP control protocol (RTCP) Real-time streaming protocol (RTSP) SIP Special Module on Media Processing
More informationTransporting Voice by Using IP
Transporting Voice by Using IP Voice over UDP, not TCP Speech Small packets, 10 40 ms Occasional packet loss is not a catastrophe Delay-sensitive TCP: connection set-up, ack, retransmit delays 5 % packet
More informationIntroduction to Quality of Service
Introduction to Quality of Service The use of IP as a foundation for converged networks has raised several issues for both enterprise IT departments and ISPs. IP and Ethernet are connectionless technologies
More informationA Novel Software-Based H.323 Gateway with
A Novel Software-Based H.323 Gateway with Proxy-TC for VoIP Systems Presenter : Wei-Sheng Yin Advisor : Dr. Po-Ning Chen Institute of Communications Engineering National Chiao Tung University Agenda Introduction
More informationEarthLink Business SIP Trunking. Allworx 6x IP PBX SIP Proxy Customer Configuration Guide
EarthLink Business SIP Trunking Allworx 6x IP PBX SIP Proxy Customer Configuration Guide Publication History First Release: Version 1.0 August 30, 2011 CHANGE HISTORY Version Date Change Details Changed
More informationExam Questions
Exam Questions 920-180 ncts real time networking https://www.2passeasy.com/dumps/920-180/ 1. Which three components are H.323 endpoints? (Choose three.) A. Gatekeeper B. Terminal C. Gateway D. Multipoint
More informationInternet Streaming Media. Reji Mathew NICTA & CSE UNSW COMP9519 Multimedia Systems S2 2006
Internet Streaming Media Reji Mathew NICTA & CSE UNSW COMP9519 Multimedia Systems S2 2006 Multimedia Streaming UDP preferred for streaming System Overview Protocol stack Protocols RTP + RTCP SDP RTSP SIP
More informationVolume SUPPORTING THE CONVERGED NETWORK. Mark A. Miller, P.E. President DigiNet Corporation. A technical briefing from: July 2002
Volume 6 SUPPORTING THE CONVERGED NETWORK Mark A. Miller, P.E. President DigiNet Corporation A technical briefing from: July 2002 Table of Contents Executive Summary i 1. The Challenge of Supporting Converged
More informationOSI Layer OSI Name Units Implementation Description 7 Application Data PCs Network services such as file, print,
ANNEX B - Communications Protocol Overheads The OSI Model is a conceptual model that standardizes the functions of a telecommunication or computing system without regard of their underlying internal structure
More information陳懷恩博士助理教授兼所長國立宜蘭大學資訊工程研究所 TEL: # 255
Introduction ti to VoIP 陳懷恩博士助理教授兼所長國立宜蘭大學資訊工程研究所 Email: wechen@niu.edu.tw TEL: 3-93574 # 55 Outline Introduction VoIP Call Tpyes VoIP Equipments Speech and Codecs Transport Protocols Real-time Transport
More informationImplementing Cisco Unified Communications Manager Part 2, Volume 1
Implementing Cisco Unified Communications Manager Part 2, Volume 1 Course Introduction Learner Skills and Knowledge Course Goal and Course Flow Additional Cisco Glossary of Terms Your Training Curriculum
More informationCisco Voice Over IP Exam(CVOICE)
Cisco Voice Over IP Exam(CVOICE) Number: 642-432 Passing Score: 800 Time Limit: 120 min File Version: 1.0 http://www.gratisexam.com/ CISCO 642-432 Cisco Voice Over IP Exam(CVOICE) 61 Q&A Version 2.30 Important
More informationImproving QoS of VoIP over Wireless Networks (IQ-VW)
Improving QoS of VoIP over Wireless Networks (IQ-VW) Mona Habib & Nirmala Bulusu CS522 12/09/2002 1 Agenda Voice over IP (VoIP): Why? VoIP Protocols: H.323 and SIP Quality of Service (QoS) Wireless Networks
More informationOverview of the Session Initiation Protocol
CHAPTER 1 This chapter provides an overview of SIP. It includes the following sections: Introduction to SIP, page 1-1 Components of SIP, page 1-2 How SIP Works, page 1-3 SIP Versus H.323, page 1-8 Introduction
More informationTroubleshooting One Way Voice Issues
Troubleshooting One Way Voice Issues Document ID: 5219 Contents Introduction Prerequisites Requirements Components Used Conventions Problem Solutions Ensure That IP Routing Is Enabled on the Cisco IOS
More informationMultimedia networking: outline
Multimedia networking: outline 7.1 multimedia networking applications 7.2 streaming stored video 7.3 voice-over-ip 7.4 protocols for real-time conversational applications: RTP, SIP 7.5 network support
More informationINTERNATIONAL INTERCONNECTION FORUM FOR SERVICES OVER IP. (i3 FORUM) Interoperability Test Plan for International Voice services
INTERNATIONAL INTERCONNECTION FORUM FOR SERVICES OVER IP (i3 FORUM) Workstream Technical Aspects Workstream Operations Interoperability Test Plan for International Voice services (Release 3.0) May 2010
More informationTODAY AGENDA. VOIP Mobile IP
VOIP & MOBILE IP PREVIOUS LECTURE Why Networks? And types of Networks Network Topologies Protocols, Elements and Applications of Protocols TCP/IP and OSI Model Packet and Circuit Switching 2 TODAY AGENDA
More informationMobile MOUSe IMPLEMENTING VOIP ONLINE COURSE OUTLINE
Mobile MOUSe IMPLEMENTING VOIP ONLINE COURSE OUTLINE COURSE TITLE IMPLEMENTING VOIP COURSE DURATION 13 Hour(s) of Self-Paced Interactive Training COURSE OVERVIEW The Cisco Implementing VoIP course validates
More informationREACTION PAPER 01 TEL 500
TEL 500 Session Initiation Protocol Improvement Using Inter-Asterisk exchange Introduction: Within the VoIP network environment, H323, SIP and IAX are three protocols that solve the problem of voice packet
More informationAbstract. Avaya Solution & Interoperability Test Lab
Avaya Solution & Interoperability Test Lab Application Notes for Configuring SIP Trunking between Global Crossing Voice over IP services including VoIP On- Net Plus, VoIP Outbound, VoIP Local Service,
More informationConfiguring T.38 Fax Relay
Configuring T38 Fax Relay Configuring T38 Fax Relay, page 1 Configuring T38 Fax Relay This chapter describes configuration for T38 fax relay on an IP network T38 is an ITU standard that defines how fax
More informationProtocols supporting VoIP
Protocols supporting VoIP Dr. Danny Tsang Department of Electronic & Computer Engineering Hong Kong University of Science and Technology 1 Outline Overview Session Control and Signaling Protocol H.323
More informationInternet Streaming Media. Reji Mathew NICTA & CSE UNSW COMP9519 Multimedia Systems S2 2007
Internet Streaming Media Reji Mathew NICTA & CSE UNSW COMP9519 Multimedia Systems S2 2007 Multimedia Streaming UDP preferred for streaming System Overview Protocol stack Protocols RTP + RTCP SDP RTSP SIP
More informationCourse Outline: Implementing Cisco IP Telephony & Video, Part 1 (CIPTV1)
Course Outline: Implementing Cisco IP Telephony & Video, Part 1 (CIPTV1) Learning Method: Instructor-led Classroom Learning Duration: 5.00 Day(s)/ 40 hrs : CIPTV1 v1.0 gives the learner all the tools they
More informationImplementing Cisco IP Telephony & Video, Part 1 (CIPTV1) 1.0
Implementing Cisco IP Telephony & Video, Part 1 (CIPTV1) 1.0 COURSE OVERVIEW: Implementing Cisco IP Telephony & Video, Part 1 (CIPTV1) v1.0 is a five-day course that prepares the learner for implementing
More informationA common issue that affects the QoS of packetized audio is jitter. Voice data requires a constant packet interarrival rate at receivers to convert
A common issue that affects the QoS of packetized audio is jitter. Voice data requires a constant packet interarrival rate at receivers to convert data into a proper analog signal for playback. The variations
More informationRTP implemented in Abacus
Spirent Abacus RTP implemented in Abacus 编号版本修改时间说明 1 1. Codec that Abacus supports. G.711u law G.711A law G.726 G.726 ITU G.723.1 G.729 AB (when VAD is YES, it is G.729AB, when No, it is G.729A) G.729
More informationVoIP Core Technologies. Aarti Iyengar Apricot 2004
VoIP Core Technologies Aarti Iyengar Apricot 2004 Copyright 2004 Table Of Contents What is Internet Telephony or Voice over IP? VoIP Network Paradigms Key VoIP Protocols Call Control and Signaling protocols
More informationCisco Webex Cloud Connected Audio
White Paper Cisco Webex Cloud Connected Audio Take full advantage of your existing IP telephony infrastructure to help enable a Webex integrated conferencing experience Introduction Cisco Webex Cloud Connected
More informationIntroduction. H.323 Basics CHAPTER
CHAPTER 1 Last revised on: October 30, 2009 This chapter provides an overview of the standard and the video infrastructure components used to build an videoconferencing network. It describes the basics
More informationNetwork+ Guide to Networks 6th Edition. Chapter 12 Voice and Video Over IP
Network+ Guide to Networks 6th Edition Chapter 12 Voice and Video Over IP Objectives Use terminology specific to converged networks Explain VoIP (Voice over IP) services, PBXs, and their user interfaces
More informationTheoretical and Practical Aspects of Triple Play
Theoretical and Practical Aspects of Triple Play 1. Introduction 2. Network and Protocol Architecture for Triple Play 3. Characteristics and Parameters of Triple Play 4. Main QoS and QoE Methods and Standards
More informationSystem-Level Configuration Settings
CHAPTER 5 Configure system-level settings before you add devices and configure other Cisco Unified CallManager features. This section covers the following topics: Server Configuration, page 5-1 Cisco Unified
More informationvoice-enabling.book Page 72 Friday, August 23, :19 AM
voice-enabling.book Page 72 Friday, August 23, 2002 11:19 AM voice-enabling.book Page 73 Friday, August 23, 2002 11:19 AM C H A P T E R 4 Offering Bundled and Data Services Chapter 2, VoIP Network Architectures:
More informationCisco PGW 2200 and HSI Softswitch Out of band DTMF for SIP and H.323
Cisco PGW 2200 and HSI Softswitch Out of band DTMF for SIP and H.323 Document ID: 49923 Contents Introduction Prerequisites Requirements Components Used Conventions Cisco PGW 2200 and HSI DTMF Out of band
More informationETSF10 Internet Protocols Transport Layer Protocols
ETSF10 Internet Protocols Transport Layer Protocols 2012, Part 2, Lecture 2.2 Kaan Bür, Jens Andersson Transport Layer Protocols Special Topic: Quality of Service (QoS) [ed.4 ch.24.1+5-6] [ed.5 ch.30.1-2]
More informationLecture 14: Multimedia Communications
Lecture 14: Multimedia Communications Prof. Shervin Shirmohammadi SITE, University of Ottawa Fall 2005 CEG 4183 14-1 Multimedia Characteristics Bandwidth Media has natural bitrate, not very flexible. Packet
More informationEarthLink Business SIP Trunking. Toshiba IPEdge 1.6 Customer Configuration Guide
EarthLink Business SIP Trunking Toshiba IPEdge 1.6 Customer Configuration Guide Publication History First Release: Version 1.0 August 30, 2011 CHANGE HISTORY Version Date Change Details Changed By 1.0
More informationIntroduction. We have learned
H.323 Introduction We have learned IP, UDP, RTP (RTCP) How voice is carried in RTP packets between session participants How does one party indicate to another a desire to set up a call? How does the second
More informationInternet Telephony: Advanced Services. Overview
1 Internet Telephony: Advanced Services Henning Schulzrinne Dept. of Computer Science Columbia University New York, New York schulzrinne@cs.columbia.edu Overview SIP servers and CO architecture authentication
More informationSecure Telephony Enabled Middle-box (STEM)
Report on Secure Telephony Enabled Middle-box (STEM) Maggie Nguyen 04/14/2003 Dr. Mark Stamp - SJSU - CS 265 - Spring 2003 Table of Content 1. Introduction 1 2. IP Telephony Overview.. 1 2.1 Major Components
More informationPROTOCOLS FOR THE CONVERGED NETWORK
Volume 2 PROTOCOLS FOR THE CONVERGED NETWORK Mark A. Miller, P.E. President DigiNet Corporation A technical briefing from: March 2002 Table of Contents Executive Summary i 1. Converging Legacy Networks
More informationCisco Cisco Voice over IP (CVOICE) Practice Test. Version QQ:
Cisco 642-436 642-436 Cisco Voice over IP (CVOICE) Practice Test Version 3.8 QUESTION NO: 1 Cisco 642-436: Practice Exam Which two statements describe the purpose of the technology prefix? (Choose two.)
More informationMultimedia Networking. Protocols for Real-Time Interactive Applications
Multimedia Networking Protocols for Real-Time Interactive Applications Real Time Protocol Real Time Control Protocol Session Initiation Protocol H.323 Real-Time Protocol (RTP) RTP is companion protocol
More informationITTC Communication Networks The University of Kansas EECS 780 Multimedia and Session Control
Communication Networks The University of Kansas EECS 780 Multimedia and Session Control James P.G. Sterbenz Department of Electrical Engineering & Computer Science Information Technology & Telecommunications
More informationCisco Optimizing Converged Cisco Networks. Practice Test. Version 2.6. https://certkill.com
Cisco 642-845 642-845 Optimizing Converged Cisco Networks Practice Test Version 2.6 QUESTION NO: 1 Cisco 642-845: Practice Exam Refer to the exhibit. NBAR is to be configured on router R1 to limit outgoing
More informationReal-Time Control Protocol (RTCP)
Real-Time Control Protocol (RTCP) works in conjunction with RTP each participant in RTP session periodically sends RTCP control packets to all other participants each RTCP packet contains sender and/or
More informationEarthLink Business SIP Trunking. ShoreTel 14.2 IP PBX Customer Configuration Guide
EarthLink Business SIP Trunking ShoreTel 14.2 IP PBX Customer Configuration Guide Publication History First Release: Version 1.0 August 30, 2011 CHANGE HISTORY Version Date Change Details Changed By 1.0
More informationPopular protocols for serving media
Popular protocols for serving media Network transmission control RTP Realtime Transmission Protocol RTCP Realtime Transmission Control Protocol Session control Real-Time Streaming Protocol (RTSP) Session
More informationCHAPTER. Introduction. Last revised on: February 13, 2008
CHAPTER 1 Last revised on: February 13, 2008 The Cisco Unified Communications System delivers fully integrated communications by enabling data, voice, and video to be transmitted over a single network
More informationBecome a WebRTC School Qualified Integrator (WSQI ) supported by the Telecommunications Industry Association (TIA)
WSQI Certification Become a WebRTC School Qualified Integrator (WSQI ) supported by the Telecommunications Industry Association (TIA) Exam Objectives The WebRTC School Qualified Integrator (WSQI ) is designed
More informationReserving N and N+1 Ports with PCP
Reserving N and N+1 Ports with PCP draft-boucadair-pcp-rtp-rtcp IETF 83-Paris, March 2012 M. Boucadair and S. Sivakumar 1 Scope Defines a new PCP Option to reserve a pair of ports (N and N+1) in a PCP-controlled
More informationRSVP Support for RTP Header Compression, Phase 1
RSVP Support for RTP Header Compression, Phase 1 The Resource Reservation Protocol (RSVP) Support for Real-Time Transport Protocol (RTP) Header Compression, Phase 1 feature provides a method for decreasing
More informationThe Dynamic Payload Type Interworking for DTMF and Codec Packets for SIP-to-SIP Calls feature provides
Dynamic Payload Type Interworking for DTMF and Codec Packets for SIP-to-SIP Calls The Dynamic Payload Type Interworking for DTMF and Codec Packets for SIP-to-SIP Calls feature provides dynamic payload
More informationfreq-power-twist, on page 64 frequency (cp-dualtone), on page 66
fax interface-type, on page 3 fax protocol (dial peer), on page 5 fax protocol (voice-service), on page 7 fax protocol t38 (dial peer), on page 10 fax protocol t38 (voice-service), on page 13 fax rate
More informationDynamic Payload Type Interworking for DTMF
Dynamic Payload Type Interworking for DTMF and Codec Packets for SIP-to-SIP Calls The feature provides dynamic payload type interworking for dual tone multifrequency (DTMF) and codec packets for Session
More informationMODULE: NETWORKS MODULE CODE: CAN1102C. Duration: 2 Hours 15 Mins. Instructions to Candidates:
BSc.(Hons) Computer Science with Network Security BEng (Hons) Telecommunications Cohort: BCNS/17B/FT Examinations for 2017-2018 / Semester 2 Resit Examinations for BCNS/15A/FT, BTEL/15B/FT & BTEL/16B/FT
More information