Is it possible to gain access to the account telephony sessions event in sandbox account?

Thaks, Phong, but it looks like your blog post referred to determining presence. What I need to do is decide where to route incoming calls from a handful of 800#s to various ring groups based on the area code and prefix (and maybe the entire 10-digit number in some cases) of the caller.

We already have the logic to handle this decision in a database function, so I'm looking to ensure that the RC event exists that can be subscribed to in order to monitor every inbound call, pass the call parameters to our database function, and ultimately return the correct ring group for routing the call. Does that make sense? Is the /restapi/v1.0/account/{accountId}/telephony/sessions event the right one to use in this case?

Thank you, Phong, I thought as much because the subscription code ran without error. Now, just trying to figure out how to setup code to listen for incoming call event.

For PubNub C# please see this quick start code.

For Webhooks C#, see this quick start code.

In both cases, change the event filter to receive presence event as follow:

eventFilters = new[] { "/restapi/v1.0/account/~/extension/~/presence?detailedTelephonyState=true"}