list any two examples of web based IMs
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Answer:
Switching on my Internet Protocol Multimedia Subsystem (IMS) enabled device, it will automatically register to the IMS network using information in the identity module (such as USIM). During registration both device and network are authenticated and my device will get my user identities from the network. After this single registration, all my services will be available, including push to talk, presence, voice and video sessions, messaging and multiplayer games. Moreover, my availability information is updated at the presence server as being "online" and listing my current applications.
Answer:
Example of IMS services
Switching on my Internet Protocol Multimedia Subsystem (IMS) enabled device, it will automatically register to the IMS network using information in the identity module (such as USIM). During registration both device and network are authenticated and my device will get my user identities from the network. After this single registration, all my services will be available, including push to talk, presence, voice and video sessions, messaging and multiplayer games. Moreover, my availability information is updated at the presence server as being "online" and listing my current applications.
When I need to contact my friend Bob, I select Bob from my device's phone book and, based on his presence information, I see immediately that he is available. After pressing the "green button" on my device it will place an "ordinary" call to him. The IMS network will take care of finding and setting up a Session Initiation Protocol (SIP) session between our devices, even though Bob is currently abroad. When my call reaches Bob's terminal he will see that the call is coming from me and, additionally, he sees a text string inserted by me ("Free tickets to movie next Wednesday"). Bob answers, but tells me that he's not sure whether he is able to come. We decide to check the issue again on Sunday. Before hanging up, Bob says to me, "You won't believe what I saw today but just wait a second, I'll show you." Bob starts streaming a video clip to me, and while I'm watching.