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Fundamentals of VoIP
January 10, 2009

Contents at a Glance

Beginnings
Understanding H.323
Understanding SIP
Do You Hear What I Hear?
Putting it all Together
Voice Codecs
Softswitches
Vendor Network Architectures
Looking Under the Hood

Contents in Detail


Beginnings

I: Who Sets the Standards for VoIP?
II: Why TCP/IP Is not Sufficient for VoIP

Understanding H.323

I: History and Architecture
II: Protocols Supporting Terminals
III: Message Formats
IV: Testing System Interoperability

Understanding SIP

I: History and Architecture
II: Protocol Capabilities
III: Message Formats
IV: Describing the SIP Session
V: SIP Signaling
VI: Testing SIP Interoperability

Do You Hear What I Hear?

I: Defining Quality of Service
II: Defining Key Transmission Impairments
III: Dealing with Latency
IV: Measuring “Toll Quality”
V: Integrated Services
VI: Resource Reservation Protocol
VII: Differentiated Services
VIII: Multiprotocol Label Switching
IX: Queuing Solutions for QoS

Putting it all Together

I: VoIP Network Design
II: Implementation Tips
III: Implementation Tips, continued
IV: Implementation Tips, concluded

Voice Codecs: the tale of the Secret Decoder Ring

Softswitches

I: Getting there from here
II: Functional planes of the softswitch architecture
III: The Media Gateway Controller
IV: Media Gateway architecture
V: Media Gateway Control Protocol
VI: MEGACO/H.248 Protocol
VII: IP Multimedia Subsystem
VIII: IP Multimedia Subsystem functions

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