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yes, it's definitely a lot! Thanks for watching!

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Thanks for the feedback, we are glad you found it helpful! You can find more videos like this here: www.sunsetlearning.com/tag/cisco-collaboration/.

have u joined in sip course?

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Hi Dixon, Make some SIP calls. Trace them. All SIP devices generate these messages. If you do not have access to SIP devices, there are many websites that break down SIP messages. Here is a great one: www.3cx.com/blog/voip-howto/sip-messages/ -John

@@SunsetlearningInstitute Thank you

That is a good question to know the answer to! You can think of a phone call as having two phases. The first phase is the signaling phase. This signaling phase is where the SIP protocol operates. In the signaling phase, the originating device sends the call setup request to a call agent like CUCM and the call agent determines what to do with the call. The call agent will then use a signaling protocol to reach out to the target. This second signaling leg can be the same signaling protocol (SIP) or another signaling protocol (SCCP, MGCP, H323, etc.). Once the two signaling legs are established it is time for phase two of the call, which is the payload exchange phase. In this phase, the call agent uses signaling to tell each of the two endpoints in the call about the IP, port, codec, DTMF, etc. that it should use to send RTP (which is the payload exchange protocol) to the other endpoint. At that point, the two endpoints exchange RTP with each other directly to carry the voice or video payload. Which, I suppose doesn't exactly answer your question. Here is another way to think about it. It is possible for two endpoints to signal directly to each other to set up a call and then exchange RTP directly as well. We add a centralized call agent into the mix for signaling so that we can have a centralized dial plan, enforce calling privilege policy, call admission control, and other centralized call control features. The RTP stream, on the other hand, does not need to flow through the call agent since the call agent's job is to only handle the signaling. I hope this answers your question. If not, please let me know. Maren Mahoney - Sunset Learning Institute

Hello, we're glad you found this helpfull! We have several resources like this within our neXT Learning Community portal. It also includes a discussion board to chat with our instructors. If you are intersted, you can email neXTLive365@sunsetlearning.com and we will get you access into the community for free!

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Hi Prashant, I am not exactly sure which product you’re asking about. There are two that come to mind: Cisco has a vCube - a virtual CUBE that runs inside of their UCS/VMWare servers. This is a something you would use in a production environment, instead of using an entire physical router. The other product you might mean is GNS3. This is used for self-study and practicing learning the commands. - someone who doesn’t not need a real production CUBE. GNS3 is software that you can run on our laptop, it allows you to install and work with a real router operating system (IOS) assuming you have one available to use. In my video, I was using a physical 2911 router/CUBE via telnet. JOHN MEERSMA

@@SunsetlearningInstitute pls share reaming videos of SIP

@@krk1848 Thanks for the suggestion!