It is possible, but depending on you setup can be quite complex.
One way is to ensure that your dial-peer configuration does not match the extensions you do not want to be reachable directly from the outside.
If the extensions are not in a range this means creating a lot of dial-peers :-(
Another way is that you add a prefix before the H.323 gateway forwards to CCM, then add translation patterns that match the extensions+prefix that should be reachable using DID to be translated so that the prefix is removed again. This is most likely the easiest way if you have a H.323 gateway and the extension are not in one range.
If you're using a MGCP gateway there are probably other possibilities using partitions and calling search spaces, but I am not familiar with MGCP gateway config, so I'm not able to tell nor verify.
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...