Inter-Asterisk Exchange (IAX): Deployment Scenarios in SIP-Enabled Networks / Edition 1 available in Hardcover
- Pub. Date:
Written by an expert in the field of telecommunications, thisbook describes the Inter-Asterisk Exchange protocol (IAX) and itsoperations, discussing the main characteristics of the protocolincluding NAT traversal, security, IPv6 support, interworkingbetween IPv4 and IPv6, interworking with SIP and many others. Theauthor presents the ways in which IAX can be activated so as toavoid complications such as NAT and the presence of intermediaryboxes in operational architectures. This book analyticallydemonstrates the added values of IAX protocol compared to existingones, while proposing viable deployment scenarios that assess thebehavior of the protocol in operational networks.
- Promotes a viable alternative protocol to ease deployment ofmultimedia services
- Analyses the capabilities of the IAX protocol and its abilityto meet VoIP service provider requirements, and provides scenariosof introducing IAX within operational architectures
- Addresses the advantages and disadvantages of SIP, and Detailsthe features of IAX that can help, in junction with SIP, toovercome various disadvantages of SIP
- Explores the added values of IAX protocol compared to existingprotocols
- Discusses the compatibility of new adopted architectures andassociated protocols
This book will be a valuable reference for service providers,protocol designers, vendors and service implementers. Lecturers andadvanced students computer science, electrical engineering andtelecoms courses will also find this book of interest.
|Series:||Wiley Series on Communications Networking & Distributed Systems Series , #31|
|Product dimensions:||6.80(w) x 9.80(h) x 0.80(d)|
About the Author
Table of ContentsForeword.
Terminology and Definitions.
Acronyms and Abbreviations.
1.1 General Introduction.
1.2 On Voice over IP and Telephony over IP.
1.4 Enhancement Strategies to Solve SIP Issues.
1.5 IAX: Towards Lightweight Telephony Architectures.
1.6 IAX and Standardisation.
1.8 What This Book is Not.
1.9 Structure of the Book.
2 The IAX Protocol at a Glance.
2.1 What Does IAX Stand For?
2.2 Is IAX Specific to the Asterisk Platform?
2.3 What is the Difference between IAX2 and IAX?
2.4 Why another New VoIP Protocol?
2.5 How Does IAX Solve VoIP Pains?
2.6 How is Calls Multiplexing Achieved?
2.7 And What About Demultiplexing?
2.8 What Port Number Does IAX Use?
2.9 What Transport Protocol Does IAX Use?
2.10 Is IAX a Reliable Protocol?
2.11 How Does IAX Ensure Reliability?
2.12 Is there an IAX Registration Procedure?
2.13 Does IAX Registration Differ from SIP Registration?
2.14 How Are Media Streams Transported in IAX?
2.15 Is CODEC Negotiation Supported by IAX?
2.16 Is On-Fly CODEC Change Possible During a Call?
2.17 IAX: a Path-Coupled or Decoupled Protocol?
2.18 Can IAX be Aware of the Status of the Network Load?
2.19 What About Security?
2.20 Could IAX Devices Be Managed?
2.21 Is Firmware Version Updating Supported by IAX?
2.22 Can IAX Be Extended to Offer New Features?
2.23 How is an IAX Resource Identified?
2.24 What Does an IAX URI Look Like?
2.25 Is it Possible to Set a Call Involving Several IAXServers?
2.26 Is it Possible to Discover the Location of an IAXResource?
2.27 What Is DUNDi?
2.28 What Is TRIP?
2.29 What Is ENUM?
Part One: IAX Protocol Specifications.
3 IAX Uniform Resource Identifier.
3.2 Format of IAX Uniform Resource Identifiers.
3.3 Examples of IAX Uniform Resource Identifiers.
3.4 Comparing IAX Uniform Resource Identifiers.
3.5 IAX Uniform Resource Identifiers and ENUM.
4 IAX Frames.
4.2 Full Frames.
4.3 Mini Frames.
4.4 Meta Frames.
4.5 Encrypted Frames.
5 IAX Information Elements.
5.2 List of IAX Information Elements.
5.3 Example of IAX Information Element Traces.
6 IAX Messages.
6.2 Taxonomy of IAX Messages.
6.3 IAX Requests/Responses.
6.4 IAX Functional Categories.
6.5 IAX Media Frames.
6.6 IAX Reliable/Unreliable Messages.
7 IAX Connectivity Considerations.
7.2 IAX Transport Protocol.
7.3 IAX Port Number.
7.4 IAX Call Multiplexing and Demultiplexing.
7.5 IAX Reliability Mechanism.
7.6 Authentication and Encryption.
8 IAX Operations.
8.2 Provisioning and Firmware Download.
8.4 Call Setup.
8.5 Call Tear-Down.
8.6 Call Monitoring.
8.7 Call Optimisation.
Part Two: Discussion and Analysis.
9 IAX and Advanced Services.
9.2 CODEC Negotiation.
9.3 Video Sessions.
9.4 Negotiation of Several Media Types in the Same IAXSession.
9.5 Presence Services.
9.6 Instant Messaging.
9.7 Topology Hiding.
10 Multi-IAX Servers Environment.
10.3 Discovery of IAX Resources.
10.4 Setting End-to-End Calls.
10.5 Load Balancing.
10.6 Path-Coupled and Path-Decoupled Discussion.
10.8 Route Symmetry.
11 IAX and NAT Traversal.
11.3 NAT Types.
11.4 IAX and NAT Traversal Discussion.
11.5 Operational Considerations.
12 IAX and Peer-to-Peer Deployment Scenarios.
12.3 A P2P Solution for Corporate Customers.
13 IAX and IPv6.
13.2 Context and Assumptions.
13.3 Service Migration to IPv6.
13.5 The IP Address Exhaustion Problem.
13.6 IPv6: a Long-Term Solution.
13.7 Why IPv6 May Be Problematic for Telephony SignallingProtocols: the SIP Example.
13.8 IAX: an IP Version-Agnostic Protocol?
13.9 Deployment of IAX Services in a ‘Pure’ IPv6Environment.
13.10 Heterogeneous Environment.
14 IAX: Towards a Lightweight SBC?.
14.2 IP Telephony Administrative Domain.
14.3 Deployment Scenarios.
14.4 Deployment Contexts.
14.5 Service Limitations Caused by SBCs.
14.6 Functional Decomposition.
14.7 Taxonomy of SBC Functions in an SIP Environment.
14.8 Validity of these Functions in an IAX Architecture.
Part Three: Deployment Scenarios in SIP-BasedEnvironments.
15 Scenarios for the Deployment of IAX-Based ConversationalServices.
15.1 SIP Complications.
15.3 Beyond the ‘SIP-Centric’ Era.
15.5 Overall Context.
15.6 Architectural Requirements.
15.7 Brief Comparison.
15.9 Introducing IAX into Operational Networks.
16 IAX in the Access Segment of SIP-Based ServiceArchitectures.
16.2 A ‘High-Level’ Description of the InterworkingFunction.
16.3 Examples of Call Flows.
16.4 Bandwidth Optimisation: An Extension to SIP.
17 Validation Scenario.
17.2 Configuring Asterisk Servers.
17.3 Configuring the SIP Express Router (SER).
17.4 User Agent Configuration.