[cisco-voip] CUCM VCS DNS SRV Registration and URI Dialing

[Daniel]

Hi All,

There’s a lot of acronyms in that subject!!

We’re currently looking at integrating VCS into our CUCM and H323 Tandberg
environment to migrate our VC/Tandberg/Telepresence gear to SIP and enable
external IP video conferences.

We're on CUCM 8.5 with the new VCS being VCS-C 7.1 we will have VCS-E also.

My question is on the strategy for our domain name and what to use for DNS
SRV and URI Dialling.
When we upgrade to CUCM 9.0 and have URI dialling within CUCM do the domain
names need to be different on CUCM and VCS?

How will it work, how will the call route if I'm dan at test.com on CUCM and
VCS.?
Does it need to be dan at test.com on CUCM and dan at video.test.com on VCS?
This would be eaiser with a SIP route pattern of "@video.test.com" to VCS
etc...
External DNS (VC calls form the internet) would then be transformed from "@
test.com" to "@video.test.com" on the VCS
Calls from VCS to CUCM would use DNS SRV, zones, and search rules pattern
matching @test.com to be sent to CUCM. CUCM would be configured with a
cluster wide FQDN as "test.com"

Right now its 1234@<CUCM IP> on CUCM and dan at test.com (@test.com external
also) on VCS which is very simple.

I think I understand how it works for registration but not for call routing.

I just want to make sure we configure the correct domain name now so we
don't have to change it in the future when upgrading to CUCM 9+.

Does anyone have any experience with this?

thanks

Dan
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