Have you done all the obvious things like checking the route to the remote phone (ping form the CCM).
Is the phone obtaining an IP address (ie is DHCP working?)
If not it will more than likely be a routing issue, if you are using DHCP to configure the phones, you will need an "ip helper-address" statement on the router interface pointing it the broadcast packets to the CCM (as it is not on the same subnet)
A few question. IS DHCP working or are you statically configuring the IP Phone? IF DHCP do you see the lease provided in the DHCP Server? Are you pointing to the TFTP Server for the download (DHCP Option 150 is easiest).
Do you have the Autoregistration turned on on the CCM you are pointing to? Or are you trying to manually configure the IP Phone in CCM?
seems like network issues are most likely unless you have other phones registering correctly. we encountered a very similar problem with using refirbished phones - erasing the configuration on the phone resolved the problem for us.
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...