Currently, the maximum number of concurrent calls or calling channels is limited to 300 per a SIP Profile. However, you can create as many SIP Profiles as you like. With Skype Connect, you can also benefit from “bursting”.
The number of incoming calls that your business can support depends on how you’ve configured Skype Connect, your network infrastructure and your internet connection.
You can buy Channel Subscriptions for each SIP Profile that you set up Skype Connect for.
For more information, go to What is Skype Connect™ and how does it work?
To get help, you can also visit the Skype Community.