For businesses that want the voice agents to only answer the calls on after hours or off days , how can I set up my VAPI assistant which is connected with a Twilio number to answer calls systematically in specific time periods only ? Hope my question is clear and I'd love to hear your response if you know of a solution for this. Thanks and have a good day!

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I've configured mine with the call center (CCasS) software forwarding the call to my Vapi assistant if outside of business hours. You could use a Twilio function to compute the time and decide if inside or outside business hours.

Can you explain a bit regarding the Twilio function and how you set it up ? Or maybe any resource will do as well

Google: https://www.twilio.com/docs/serverless/functions-assets/quickstart/time-of-day-routing

There are multiple ways to accomplish this despite VAPI not having a native way to handle business hours for an assistant. Depends how you want your desired output to be