I am looking for some documents describing call flow of VCS-E and VCS-C in H.323 just like the jpg I attached.
(Especially when an endpoint dials from internet to intranet)
Is there any documents like tthat?
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I do not have something out of the box, but you should be able to make it yourself.
The debug capability on the vcs can help you here, as well as analyzing a network trace with wireshark.
It will have a lot of similarities of your drawaing, besides possible assent/h460.18 and different media flows.
Why do you ask?
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Thank you for your information.
This is exactly what I wanted.
BTH this call flow seems to be one page of a document.
Where can I get the document?
This is very simple document but I have uploaded to https://supportforums.cisco.com/docs/DOC-27662 for your connivance in case of you need it for making any report/proposal to customer.
Please note this is not official document and only contain key call flow messages and not including all messages that exchange between devices.
These links may help also.