Introduction to SIP

A three day class on SIP, the Session Initiation Protocol and companion protocols. This class gives you the foundation needed to work with SIP and debug SIP.

Agenda:

• The history of SIP
• Protocol constructs: Requests and responses
• Transactions and dialogs
• SIP addressing
• Using DNS: Locating a SIP server
• SIP routing
• Proxy servers and B2B-user-agents
• Gatewaying to the PSTN: SIP trunking
• Debugging SIP
• RTP – The media protocol
• RTCP – Controlling QoS
• Codecs for audio and video
• SIP Presence and busy lamp fields
• SIP call transfers
• SIP security

Labs:

• Registering a phone to a domain
• Watching what happens in Asterisk
• Call routing with SIP Proxys
• Debugging with Wireshark