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call Flow through VCS c/e

Hi Geeks,

I am posting this to understand "How stuff works". Below is the Design.

i have a VCSc configured with SIP domain of example.com  (we have internal DNS server to resolve it)

i have a VCSe configured with SIP domain of cisco.com  (we have external DNS server to make it globally routable)

i create a traversal link bw VCSc and VCSe.

how will the call flow  between Ep A and Ep B

Scenario A

My Ep A is  Ex90@example.com  dials a Ep B Jabber client (home user) registered on VCSe jabber@cisco.com

how will call flow; i want to understand the flow from beginning ie Ex 90 will send an register message to VCSc etc etc.

Scenario B :

if Ep A Ex90@example.com call a 3rd party (seperate company) =  ( inter business calling ) End point ie stranger@Dell.com

how will the call flow.

Please excuse me for asking Layman Explanation:

Thanks in advance

// Vikram

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call Flow through VCS c/e

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