The simple answer is, yes. A couple of variables need to be addressed when using VoIP behind NAT. First and foremost what protocol of VoIP are you using H.323 or SIP? If you use SIP then NAT is not a problem. SIP was designed with NAT in mind and supports NAT natively.
The older versions of H.323 have problems with NAT because the originating devices IP address (say 192.168.1.100) is actually used in the higher layers and doesnt get translated, therefore the terminating devices wont be able route back to it.
This problem can be addressed with the use of a PIX or other H.323 aware firewall. You can also address the problem with the use of a H.323 proxy that mediates H.323 call setups between your private and public IP addresses.
There was a link to a Cisco PDF file floating around this forum that specifically addressed this scenario.
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...