Hi! I'm new to the Voice AI platform and need some help. I want to provide a simple Voice AI inbound service to a local restaurant that currently uses a landline (they are not interested in porting to Twilio). I could have the restaurant forward inbound calls to a new Twilio number that I purchase, and handle the automation through that. But if the customer wants to speak to a human, how can I transfer the call back to the restaurant’s landline, given that the landline forwards all incoming calls to my Twilio number in the first place?It will create an endless loop. I do not want the restaurant to setup a new landline just so that twilio could transfer tricky calls and leave it for a human to answer. If my situation isn’t typical, what is the general approach that Voice AI agencies use as an industry standard when setting up and integrating a business’s existing number for inbound calls? Thanks!

@sunit Hello! I'm glad you're exploring the Voice AI platform for your local restaurant's needs. You're correct that simply forwarding calls from the restaurant's landline to a Twilio number and then trying to transfer back to the same landline would create a loop. However, there's a common workaround for this situation. The general approach is to use a feature known as "call whisper" or "call screening." Here's how it works: 1. The restaurant forwards calls to the Twilio number. 2. Your Voice AI system answers the call and provides the automated service. 3. If the caller needs to speak with a human, the system initiates a "call whisper" which is a message played to the person answering the call (at the restaurant), asking if they want to accept the call. 4. The restaurant staff can then press a key to accept the call, and the system connects the caller to the staff member without forwarding the call back to the original landline number. This way, the call is transferred to a human at the restaurant without creating a loop. The restaurant doesn't need a new landline; they just need to be able to receive the "whisper" and accept the call. If you need further assistance with setting up this feature or have any other questions, please feel free to ask.

Hey @sunit to use local numbers you can do it using SIP, and for call forwarding you check this documentation https://docs.vapi.ai/call-forwarding. Now SIP allows you to use your existing numbers without using twilio. What you have to do next is connect with your telephony provider, ask them about the SIP and then using the below documentation setup SIP with Vapi. The documentation contains the example using Twilio but process is roughly the same.