VCS Expressway and Endpoint DNS Registration

habouzyad · ‎10-10-2014

Hi all,

I have installed and configured a Cisco VCS Expressway on DMZ zone. I have installed on the same Zone two Endpoint ( SX20).

I can make an H323 external call from Endpoint to through the VCSE with success.

Now , for the external incoming calls, i have the following question :

1- My domain is for ex : hicham.com

2- my public ip address that used by VCSE ( NAT on the Firewall is : for ex : 212.217.3.9)

3- the First SX20 H323ID is : ROOM1@hicham.com , SIP URI : ROOM1@hicham.com

4- The Second SX20 H323id is : ROOM2@hicham.com , SIP URI : ROOM2@hicham.com

My question is how from external can i call the both SX20 ? and in the DNS Server how can i configure the both Endpoint to be resolved correctly ?

Thanks in advance

Regards

CHAM

Patrick Sparkman · ‎10-10-2014

Both the SX20 endpoints would be registered to your VCS Expressway, and you would have DNS SRV records for your domain (hicham.com) that point to your Expressway. All incoming external calls would then be routed via the Expressway to connect to either of the two endpoints.

This has been asked many times in the forums, a search pulled up the following for example.

dns-srv-record-issue-vcs-expressway

The VCS Basic Deployment Guide, appendix 2, is also a good resource and provides examples.

Cisco-VCS-Basic-Configuration-Control-with-Expressway-Deployment-Guide-X8-2

As well as the following document that just goes over DNS SRV records for the VCS.

dns-srv-telepresence-video-communication-server

habouzyad · ‎10-27-2014

Hello Patrick,

Thank you very much for the answer. it was very useful for me

I configured the DNS SRV record , and now i can call from external endpoint (B2B) to the internal endpoint ( ROOM1@hicham.com ).

The call is activated , but i cant not receive audio and video in the both Endpoint !

I woul ask if there is any specifical configuration to do on the VCS Expressway to permit the Video CALL to be routed through the VCSEXpressway ( including Signaling and Media).

PS : the VCS Expressway is installed with the Endpoint on the DMZ , and we configured a public IP address with nat to the VCS Expressway.

Thank in advance

Regards

CHAM