CUCM and/or ACDs can issue Route Requests and can therefore be considered as Switch leg devices.
Unified ICM perceives calls that need IVR treatment as having two portions:
Unified CVP can participate in the Switch role or the VRU role, or both, from the perspective of Unified ICM.
In a network deployment, multiple Unified CVP devices can also be deployed to provide the Switch and VRU portions independently.
CVP's IVR Service functions as the VRU leg.
Can you help me understand, how many VXML and Call server ports will be utilized for a single call. I'm very confused about usage of these ports.
At present, in my environment we have 4 CVP servers (v10.0.1) with 850 VXML ports and 900 call servers ports. We are seeing lot of calls coming in and VXML port utilization is approx. 30% say hardly during peak hours it would go to 250 VXML ports being used. However at the same time we are seeing 850+ call server ports being utilized. So the ratio of ports being used for vxml and call server port is like 1:3.
Also what happens if we max out the call server ports? Will the new call fail?
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