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Voice over IP for Service Providers

5 Day Course
Hands On
Code PDN025

This course has been retired. Please view currently available Voice over IP VOIP Training Courses.

Modules

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Introduction and Background (16 topics)

  • Evolution of Telecommunications
  • Circuit Switched voice
  • Packet Switching Data
  • Motivation: Why use VOIP
  • Comparison between current voice and data network
  • One Integrated Network
  • Sharing resources
  • Migration
  • Where VOIP can be deployed
  • Integration at the PBX
  • Integration at the PC
  • Integration at the desk with IP phones
  • Which IP Network
  • Internet Telephony
  • VOIP over an Intranet
  • Internet Telephony Service Providers

The Business Case (3 topics)

  • Cost per minute savings
  • Improved Call Center Integration
  • e-Commerce with Voice Enabled Websites

Hands-on Session 1: Here is Voice Over IP Working (4 topics)

  • In this session attendees will:
  • Set up and use VoIP applications on each PC to place calls across the classroom
  • Set up a Protocol analyser on each PC and capture VoIP traffic
  • Experience Different IP environments and observe VoIP performance issues

Internet Protocol Suite Fundamentals (12 topics)

  • Sources for Protocols: ITU and IETF
  • IETF RFCs
  • Protocol Structures
  • OSI Layers
  • Functions of Layer 2, 3 4 and 7
  • Internet Application model
  • MTU and its impact on VoIP
  • Layer 2 Frame level services
  • MAC level performance and capacity issues
  • IEEE 802.3
  • IEEE 802.1P priority services
  • IEEE 802.1Q VLAN services

What is IP (5 topics)

  • Datagrams
  • Routing
  • Routing Tables
  • Routing protocols; RIP, OSPF, BGP4
  • Classification of Routers, Switches and Hosts

Carriage of IP over LANs, Frame Relay, xDSL Broadband Access, SONET/SDH (8 topics)

  • Ethernet and PPP
  • Ipv4 and Ipv6
  • TCP and UDP
  • RTP and RTCP
  • Application Examples
  • Web Services
  • Streaming
  • FTP

Hands-on Session 2: Taking apart VoIP (5 topics)

  • In this session attendees will learn how to:
  • Identify the VoIP protocols captured during VoIP conversations
  • Observe the Layer 2, Layer 3 and Layer 4 Interactions
  • Observe Packet and frame count information available from routers and switches
  • Use protocol analysers to provide packet counts on LANs

Telecommunications Fundamentals (11 topics)

  • Principles of Circuit Switching
  • Digital voice circuits
  • CODECs
  • G.711 calls
  • Switching Capacity
  • Sizing a network or switch using Erlangs
  • Blocking and non-blocking services
  • Connecting a Call In ISDN
  • Call Map
  • Access signaling
  • Q.931 Signaling messages

VoIP Architectures (17 topics)

  • IETF VoIP standards
  • SIP
  • MGCP
  • SIP-T
  • How does a normal phone call get connected
  • Call Map
  • Conversion to digital
  • Dialing and Signaling
  • Alerting and Call Progress Tones
  • Session Description Protocol
  • Evolution of SDP
  • SDP Syntax
  • Using SDP to negotiate media channels
  • Identifying media streams
  • Constructing ephemeral connections
  • Carrying DTMF signals
  • CODECs and Media streams

Hands-on Session 3: Observing SDP exchanges in Transcoded calls (2 topics)

  • Setup calls between phones using different codecs
  • Observe SDP exchanges to negotiate codecs

VoIP using IETF Architecture SIP (23 topics)

  • Why has SIP become important?
  • SIP Components
  • SIP Addressing
  • Connection signaling
  • Capabilities exchange
  • SIP Message Format
  • Encoding the content
  • Codecs
  • RTP and RTCP
  • Making an VoIP Call
  • Possible Configurations
  • Desktop to desktop
  • Desktop to phone
  • Phone to desktop
  • Phone to phone
  • Conference via a MC
  • How does this fit into an organization
  • Carrier Bypass and Service Replacement
  • Desktop integration
  • Attachment to the GSTN
  • Carrier Network Replacement.Admission Control
  • Functions that VOIP signaling must perform
  • Address mapping

Hands-on Session 4: SIP Proxy Controlled Services (5 topics)

  • In this session attendees will learn how to:
  • Setup a SIP Proxy controlled VoIP service
  • Configure a SIP application
  • Observe and capture SIP Registrar interactions and call connections
  • Observe Network Performance Using Netmeter

Carrier Class VoIP (26 topics)

  • Media Gateway Control Protocol (MGCP)
  • Protocol Architecture
  • Building Blocks
  • Naming Conventions
  • Digit Maps
  • Request, Parameters and Responses
  • Bearer Attributes
  • Example MGCP call exchange
  • Evolution of SIP to SIP-T
  • Limitations of basic SIP
  • Impact of signaling packet loss
  • Alternative operation to remove limitations
  • Positive acknowledgements
  • Carriage over TCP
  • Carriage over SCTP
  • Example operation of SIP-T exchanges
  • SIP-T Implementation Agreements
  • What is SIP-I?
  • Signaling boundary functions
  • Bearer Independent Call Control Protocol (BICC)
  • ISDN User Part (ISUP)
  • Carriage of BICC and ISUP functions over SIP
  • Q.1912.5
  • ETSI TS 186 002-2 Test Suite Structure
  • Mapping SIP-I to SS7 ISUP functions
  • Inter-working examples for Supplementary Services

Quality of the Voice (14 topics)

  • What Constitutes Quality
  • Delay
  • Availability
  • Understanding the speech
  • Recognizing the person speaking
  • Quality Measures
  • Mean end to end delay
  • Mean up time
  • Mean Opinion Scores
  • Codecs
  • Companded PCM
  • ADPCM
  • CELP
  • G.711,G.726, G.728, G.729, G.723.1

Hands-on Session 5: Observing Voice Quality Issues (3 topics)

  • In this session attendees will:
  • Use different codecs to compare performance
  • Learn to identify the impact of delay and packet loss on VoIP services

VoIP and Circuit Switched Performance Issues (30 topics)

  • Elements that affect voice quality: Delay and Loss
  • Packetization
  • Serialization
  • Propagation
  • Queuing
  • Calculating Queue Delays
  • M/M/1 Queues
  • Calculating Availability
  • Serial availability
  • Parallel availability
  • Comparing VoIP with other solutions
  • What Traditional Circuit Switching Brings to the Party
  • Reliability
  • Guaranteed Service Quality
  • Guaranteed Utilization
  • Relatively high bandwidth Demands
  • What Packet Switching Promises
  • Lower bandwidth Demands
  • Statistical Service guarantees
  • Flexibility of service limits
  • Trade-offs between delay, loss, quality and price
  • Carriers and ITSPs
  • Security Implications
  • Impact of VOIP on the firewall
  • Securing the VOIP signaling
  • Delivering QOS with VoIP
  • Mixing Voice and Data
  • RSVP
  • Diffserv
  • Weighted Fair Queues

Hands-on Session 6: Quality of service Planning (5 topics)

  • In this session attendees will learn how to:
  • Size a VoIP service
  • Predict Delay and QOS performance
  • Mix voice and Data over a low speed Router-Router Link
  • Deliver QOS in practice

Comparing VoIP against Circuit Switching (13 topics)

  • Bandwidth use
  • Flexibility of service
  • Integration with data services
  • E-commerce
  • Voice enabled Web sites
  • Service guarantees
  • Capacity availability
  • Integration with telephony systems
  • VoIP Over Broadband Access
  • Typical E-Commerce Solutions
  • Commercial Alternatives and competitors to VoIP
  • VoFR
  • VoATM

Prerequisites

The course assumes delegates have a basic understanding of telecommunications principles and have had exposure to 'hands on' TCP/IP analysis and troubleshooting.

Additional Learning

The courses below may help you meet the knowledge level required to take this course. If you are unsure please ask a training advisor .

Voice over IP VOIP Training Courses

What Our Customers Say

“The training was delivered with a high level of expertise and excellence. Instructor was highly knowledgeable.”

— Technical Trainer, Aviat Networks

“Overall the course was really good, the trainer really understood the material and was very approachable.”

— Customer Training Manager, Aviat Networks

“Excellent course, informative and well-paced.”

— CSE, Cisco

“Course was very well outlined. Topics were great and bridged many gaps.”

— System Engineer, Cable & Wireless

“An excellent intro to video encoding & MPEG transport streams - I would definitely recommend it.”

— Broadcast Engineer, Cisco

“Definitely an excellent intro. Left me interested in learning more.”

— Broadcast Engineer, Eircom

“Excellent training course with real examples and practical classroom demonstrations.”

— Transport Designer, Orange

“Instructor knowledge and experience was excellent.”

— Solutions Engineer, Akamai

“Excellent course, very clear and well organised. Course content delivery was very good.”

— Assistant Engineer, Dhiraagu

“Very informative and appropriate.”

— Network Support Technician, BT
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