Webex Calling Capacity - cscan concerning

[Clutz5250]

After trying the cscan for webex calling, I'm left with some questions. If our organization handles 300 to 500 concurrent calls for outbound alone, with CPS spiking 40+, then it seems the test connections i tried to chicago or dallas is insufficient (we would have to use local gateway btw). There's also the recorded calls hairpinning to add here and onnet signaling.

I guess the recommended approach is to add more circuits if Webex call metrics are too high? Is there a concurrent limit for tenants? 

[Vaijanath Sonvane]

Hi @Clutz5250,

Webex Calling supports Media Optimization with Interactive Connectivity Establishment (ICE) which allows devices to send media directly to one another, which reduces latency and bandwidth usage. Please see below URL for more details:

https://help.webex.com/en-us/article/nt6eyxb/Webex-Calling-media-optimization-with-Interactive-Connectivity-Establishment(ICE)

You need to consider multiple scenarios and bandwidth requirements for those before adding more circuits. Below are some scenarios, which might give you some idea about what you need to consider: 

1. If Phones are on your LAN or WAN network and the call is between internal Phones then only signaling will go over internet. RTP will be directly between phones on your LAN/WAN networks. In this case, you have to consider amount of internet bandwidth required for signaling for total number of Internal calls. 

2. You mentioned, you are going to use Local Gateway for PSTN calls. Consider implementing media optimization as mentioned in earlier URL. Inbound or Outbound call signaling will travel over Internet but your RTP will stay between Local Gateway and Phone. In this case, you have to consider amount of internet bandwidth required for signaling for total number of PSTN inbound and outbound calls.

3. If the PSTN calls and Internal User calls are going to Webex Calling Auto Attendant or Voicemail, then you need to consider amount of internet bandwidth required for both signaling and RTP for total number of calls.