Understanding Voice Over IP Technology provides students with the in-depth knowledge of Voice over IP and the TCP/IP protocol that it is based on. Voice over IP technology, or making telephone calls over data networks such as the Internet, has now reached the tipping point, and is expected to eventually become the standard telephone technology. Understanding Voice Over IP Technology provides the integral information needed by Information Technology personnel, as well as management to do their job effectively or plan for future implementations of Voice over IP. For ease of reading, the text is divided into three sections; Voice over IP Overview, TCP/IP the Platform for VOIP, and Voice over IP Technical Details. The sections cover the basics and technical elements necessary, as well as provide review resources for students. To reinforce learning, Understanding Voice Over IP Technology also provides hands-on labs that have been designed to accommodate both classroom and at home self-study. The software used in the labs is freely available for downloading from the Internet.
SECTION 1: VOICE OVER IP OVERVIEW. 1. Voice over IP Overview. What is VoIP. Residential/Small Business VoIP. Corporate VoIP. VoIP for Telephone Companies and Service Providers. 2. Why VoIP. Converging Networks. Benefits of VoIP. Issues with VoIP. Driving VoIP. 3. How Does VoIP Work? Call Control. Call Manager. Transmitting Voice. 4. Quality of Service. Quality of Service (QoS) Factors. Bandwidth: Share or Restrict. Providing QoS. Packet Level Techniques for Providing QoS. 5. Is Your Network Ready for VoIP? Power over Ethernet. The Wiring Closet. Bandwidth. Infrastructure Upgrades. Telephony State of Mind. 6. Components of the Voice over IP System. Major Players. VoIP Products. Vendor Specific. SECTION 2: TCP/IP, THE PLATFORM FOR VOIP. 7. Introduction to TCP/IP. Why TCP/IP?. Who makes TCP/IP. Protocols and applications. OSI reference model. 8. Data Link Layer. Data Link layer. Ethernet. Address Resolution Protocol. Protocol analyzers. 9. Internet Protocol. Internet Protocol. Packet structure. ICMP. 10. IP Addressing. IP addressing. Classful addressing scheme. Subnetting. Private IP Addresses. Classless IP Addressing. 11. TCP and UDP. Transmission Control Protocol. Port Assignments. TCP Header. TCP States. User Datagram Protocol. 12. DHCP. DHCP Overview. DHCP Communications. 13. DNS. Name Resolution. Hosts. Domain Name System. SECTION 3: VOICE OVER IP TECHNICAL DETAILS. 14. How IP Handles Voice. TCP/IP and Voice Protocols. Real-time Transport protocol Real-time Control Protocol. 15. Voice to Digital. Sampling, Nyquist theorem. Quantisation, companding, A-law and mu-law. Waveform Coding, G.711, G.726. Voice Coding, LPC, CELP and its variations, GSM, SPEEX, iLBC 1. More Codec Considerations - MOS, processing, licensing. VoIP Bandwidth. 16. Implementing QoS. QoS Overview. 802.1Q/802.1p. Type of Service. Differentiated Services. Multiprotocol Label Switching (MPLS). 17. H.323. H.323 Overview. Call Signaling and Setup. H.225, H.245. 18. SIP in Detail. Session Initiation Protocol (SIP). SIP Architecture. Session setup. SIP Message Structure. 19. Voice Gateways. Voice Gateways. Monolithic Gateways. FXO and FXS. Megaco. 20. Setting up a modern VoIP System. Outside Connections for your VoIP System. Direct Inward Dialing (DID). The Dial Plan. ENUM. Traversing NAT and Firewalls. Appendices: Technical topics not appropriate for the body of the textbook. Answer key.