IP phones don't require DSP resources to work. DSP resources are only needed for analog/TDM endpoints or media resources (transcoding/MTP/conference). Is the gateway using any FXO, FXS, T1/E1 cards? That will determine how many DSPs/PVDMs are needed.
When the gateway and phones are in SRST mode, media resources will not be accessible as they will unregister from the CUCM node as well. They will not register to the SRST gateway as the phones do. To confirm, the actual problem is that inbound/outbound calls are failing while in SRST mode, correct?
Are the IP phones registering to the SRST router? Can they call between themselves?
If the problem description is not accurate, can you provide us wit the correct one?
When IP phones loose connection to Call Manager they should be able to fallback to SRST and be able to dial and to receive calls. It is not happening right now. Our consultant explained to me that this is because there are not enough DSP resources and suggested to upgrade PVDM2-16 to PVDM2-32
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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 ...