Do you have the Dual NIC licence on the VCS-E? You will need this (I believe) in this deployment scenario) and you will then set One of the interface to be on the Loacl network and one on the public/external network and allow the VCS-E to apply the NATing.
NAT'ing should be done done via the VCS-E from the DMZ to public network (with the dual NIC option), however if there is a further NAT in place between the VCS-C and VCS-E, ensure that this is on a 1:to:1 mapping and the there are no additional H.323 Application Layer Gateways (ALG) running on the device between the VCS-C and VCS-E.
To test, you could place an endpoint logicically in the DMZ and register directly to the VCS-E (thus by passing the VCS-C). Does this call out correctly.
If not, then you may need to post of more deployment info such as a diagram or log capture, search results etc.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...