Voice over Internet
Protocols (VoIP)
1-Day Session

Voice over IP data networks has caught the industry by surprise. Every tabloid now consumes at least 20% of the preferred space in discussions of this application. Newer concerns about carrying time sensitive voice on a non-time sensitive data network keep surfacing. Spanning the issues of delay, throughput and security, the industry is rife with differing opinions. Proper design is crucial in maintaining support and acceptance. This one-day class will explore voice over packet networks. The focus is on Internet Protocols (IP), but any transport system can carry voice over other "data" protocols, including Frame Relay and ATM.

 Chapter 1 - Voice Communications Overview
Basic Voice Communications Networks
Bandwidth Concepts Discussed
Voice Grade Transmission
Analog to Digital Conversion
North American Digital Hierarchy

 Chapter 2 - Basics of Voice Coding, Fax and Delay
Voice Coding
ITU-G.711 Pulse Code Modulation (PCM)
ITU-G.726 Adaptive Differential PCM (ADPCM)
ITU-G.723 and ITU-G.729 Compression Techniques (LPC and CELP)
Impacts of Delay and Lost Packets on Interactive Conversations
Talker and Listener Echo Problems and possible solutions

 Chapter 3 - Internet Protocols
TCP/IP Model
Internet Protocol (IP)
Transmission Control Protocol (TCP) and User Datagram Protocol (UDP)
Virtual Private Networks (VPN) for VoIP
Resource Reservation Protocol (RSVP)
Real Time Transport Protocol (RTTP)

 Chapter 4 - Internet Telephone Service Providers (ITSP)
Voice Over IP Solution Providers
Gateway Technologies
Quality of Service Guarantees (??)

 Chapter 5 - H.323: Standards for Multimedia Communication over IP Networks
Definitions of Terminals, Gateways, and Gatekeepers
Call Setup Using H.225 and H.245
Media Transport Using the Real Time Protocol (RTP)
H.323 and Security Issues
DTMF signaling on compressed and packetized voice channels

 Chapter 6 - Voice over Frame Relay using IP
Overview of Frame Relay
Voice Transmission over Frame Relay
Advantages and Disadvantages

 Chapter 7 - Voice over IP over ATM
Overview of ATM
Voice Transmission over ATM
Advantages and Disadvantages

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Call us at 1-800-322-2202 for more information about our instructor-led training.