Understanding Voice Over IP™

Training Format: ILT
Course Code: VOICEOVERIP

For a Class Schedule Contact TRA a 800.872.4736

Description

Voice over IP (VoIP) is rapidly changing the telecommunications infrastructure. This course covers the paradigm shifts as telephony services migrate from circuit to packet. Students receive an understanding of how VoIP is being deployed, are introduced to the technologies making it possible, and learn ways to address implementation and quality of service issues.

Prerequisites

Students should understand voice and data communications, by taking:

Understanding TCP/IP™Understanding the Basics of Data Communications™

Designed for

Students looking to understand how VoIP is reshaping the communications industry.

Expected Outcome

Upon completion of this course, students should be able to:

Understand the protocols, how calls are made, interworking with PSTN, and key challenges
Describe VoIP equipment and their capabilities
Relate VoIP to business needs and expectations

Course Outline

Industry Overview

Perspective: History, Industry and Market Segments, Regulatory Environment
Networks: ITSPs, Carriers, Enterprises

Residential VoIP

Voice over Broadband Issues, Architectures and Technologies (VoCable, VoDSL, FTTP)
Service Examples
Issues: E911, CALEA

Transport Protocols and Voice Packets

Review of IP/TCP/UDP
Real-Time Transport Protocol (RTP and RTCP)
Voice Coding and Compression
Speech Quality Measurement

Quality of Service (QoS)

Real-Time Service Requirements
Delay: Sources and Impacts
Techniques: DiffServ and MPLS
Tuning a VoIP Network

H.323

H.323 Architecture and Components
Call Setup using H.225, H.245, and FastStart

Session Initiation Protocol (SIP)

SIP Network Architecture and Components
SIP Messages
Session Description Protocol
Call Examples
SIP and Presence Information
SIP vs. H.323

Media Device Control Protocols

MEGACO/H.248
MGCP

PSTN Interworking

Overview of PSTN and SS7
SS7 Interworking with H.323, SIP, MEGACO
SoftSwitch
ENUM: Phone number to Internet address mapping
Related Protocols: SCTP, SIGTRAN, SIP-T

VoIP in the Enterprise

Motivations and Concerns
IP PBX vs. Hosted VoIP / IP Centrex
Service Examples
Security and VoIP (NATs, Encryption, Firewalls)

Summary