IP Multimedia Subsystem (IMS)/Session Initiation Protocol (SIP)

What is IMS?

3G4G Blog on IMS

The IMS Tutorial at IMS Lantern


IP Multimedia in 3G Mobile Networks - Ericsson

IMS Basics

IMS: IP Multimedia Subsystem: Part 1 - FTW

IMS: IP Multimedia Subsystem: Part 2 - FTW

IMS Procedures and Protocols: The LTE User Equipment Perspective - Spirent, May 2014


SIP to PSTN Sequence Diagram

SIP to ISDN PBX Sequence Diagram

SIP Originating Call with Authentication

IMS Registration Sequence Diagrams

IMS Subscriber to IMS Subscriber Call Flow

PSTN Subscriber to IMS Subscriber Call Flow

IMS Originating to PSTN Terminating Call Flow

SDP Use in an IMS-to-IMS Call (SDP Codec Selection and QoS Signaling)

IMS Presence Subscription and Notification

IMS Presence Resource List Subscription and Notification Flow

IMS Conference Call Flow Diagrams

IMS Push-to-talk over Cellular (PoC) Call Flow Diagrams


The IMS Lantern Blog

IMS/SIP Portal

Session Initiation Protocol (SIP) Portal at Columbia.edu


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