PostgreSQL Table To See If Agent Is On A Call?

[Southerncentralrain]

I have spent hours looking through the tables and I have found a lot of good information. The one thing that seems like it should be the simplest to find, I am at a loss.

Does anyone know what table/column to query to be able to determine if one of our agents is on the phone?

Thanks in advance for your time.

 

[Southerncentralrain]

Can anyone point me to a resource that may have this information? I really appreciate any help on this.