Course 627: Advanced SIP

The Advanced SIP course provides a technical details on SIP.

After successfully completing the course the attendees will:

• Understand advanced topics of SIP
• Understand advanced SDP concepts
• Explore the architect and components of SIP
• Behavior of SIP Clients and Servers
• Examine behavior of SIP User Agents
• Examine behavior of SIP Proxy and Redirect Servers
• Analyze security considerations for SIP
• Understand SIP-T and SIP interworking with ISUP networks (PSTN)
• Understand IP Multimedia (IMS) Using SIP in UMTS and CDMA2000
• Understand the role of SIP & IMS in 3G
• Examine SIP Other Important Topics

Advanced SIP Training content

VoIP Protocol Stack

• RTP and RTCP
• H323 Protocols
• Session Initiation Protocol (SIP)
• Media Gateway Control Protocol (MGCP)
• Megaco/H248

Session Description Protocol (SDP)

• SDP Fields and Parameters
• SDP Media Information
• Type of media (video, audio, etc)
• The transport protocol (RTP/UDP/IP, H320, etc)
• The format of the media (H261 video, MPEG video, etc)
• Multicast address for media
• Transport Port for media

Session Initiation Protocol (SIP)

• Context of SIP
• SIP Functions
• SIP Hardware Architecture and User Agent (UA)
• SIP Servers
• SIP Protocol Model and Addressing
• Request and Response Model
• Locating a SIP Server
• SIP Transaction
• SIP Invitation
• Locating a User
• Changing an Existing Session
• Registration Services
• SIP Message Format
• SIP Methods
• Status Code Definitions
• Analysis of SIP Response Codes
• SIP Header Fields
• SIP Registration
• The Registrar
• SIP Registration with Authentication
• User Cancels Registration
• SIP Call Setup via Proxy Server
  

Behavior of SIP Clients and Servers

• Requests and Responses
• Source Addresses, Destination Addresses and Connections
• Unicast and Multicast UDP
• Reliability for BYE, CANCEL, OPTIONS, REGISTER
• Reliability for INVITE Requests
• Reliability for ACK Requests
• ICMP Handling

Behavior of SIP User Agents

• Caller Issues Initial INVITE Request
• Callee Issues Response
• Caller Receives Response to Initial Request
• Caller or Callee Generate Subsequent Requests
• Receiving Subsequent Requests
  

Behavior of SIP Proxy and Redirect Servers

• Redirect Server
• User Agent Server
• Proxy Server
• Proxying Requests
• Proxying Responses
• Stateless Proxy: Proxying Responses
• Stateful Proxy: Receiving Requests
• Stateful Proxy: Receiving ACKs
• Stateful Proxy: Receiving Responses
• Stateless, Non-Forking Proxy
• Forking Proxy

Security Considerations for SIP

• Confidentiality and Privacy: Encryption
• End-to-End Encryption
• Privacy of SIP Responses
• Encryption by Proxies
• Hop-by-Hop Encryption
• Via field encryption
• Message Integrity and Access Control
• Authentication
• Trusting networks and responses
• SIP Authentication using HTTP Basic and Digest Schemes
• Management Information Base for SIP
• The Stream Control Transmission Protocol (SCTP) as a Transport for for the SIP
• Compressing the SIP

SIP-T: SIP Interworking with ISUP Networks

• PSTN Interwork with SIP networks
• ISUP & SIP Signaling
• Routing of E164 numbers
• Mapping between SIP & ISUP parameters
• Handling of Telephony Events such as DTMF and Ringback
• SIP Messages, SIP- vs TEL-URIs, SIP Proxies, SIP/ISUP Gateways, ENUM DNS, IAM-INVITE

SIP & IMS in 3G: IP Multimedia Using SIP in UMTS

• 3GPP SIP Decisions
• SIP from terminal to network
• SIP between network call nodes
• SIP Protocol & Service analysis
• Deployments in UMTS and CDMA2000 Networks
• 3GPP IMS
• Security
• Charging
• QoS and Signaling
• IMS Architecture : P-CSCF, I-CSCF, and S-CSCF
• IMS Building Blocks
• Applications Layer
• End-user telephony service logic
• AIN call trigger points
• Non-telephony based services
• APIs for enterprise & legacy applications
• Session Control Layer
• End Point Registration
• Session setup
• QoS establishment
• Transport & Endpoint Layer
• Bearer Services, Media Conversion (PCM > IP)
• Special functions: announcements, touch tones collection, voice recognition, speech
• Signaling Flows
• Instant Messaging & Presence
• Push-to Talk
• Conferencing
• OSA and Parlay

SIP Other Important Topics

• A SIP Event Notification Extension for Resource Lists
• The Message Session Relay Protocol
• The Extensible Markup Language (XML) Configuration Access Protocol (XCAP)
• RPID: Rich Presence: Extensions to the Presence Information Data Format (PIDF)
• CIPID: Contact Information in Presence Information Data Format
• A Mechanism for Content Indirection in SIP Messages
• Enhancements for Authenticated Identity Management in the Session Initiation Protocol Globally Routable User Agent (UA) URIs (GRUU) in the SIP
• DHCP and DHCPv6 Option for SIP Servers
• HTTP Digest Authentication Using Authentication and Key Agreement (AKA)
• Integration of Resource Management and SIP
• SIP Extension for Instant Messaging
• S/MIME AES Requirement for SIP
• Advanced Instant Messaging Requirements for the SIP
• Transcoding Services Invocation in the SDP Using 3Pcc
• E.164 numbers with the SIP
• SIP Interoperability Testing