Once I have finished building an assistant and connected it with a Twilio phone number on VAPI, how do I connect the assistant with one of my client's business phone number so that when someone calls that biz number, the assistant answers the call ? The client wants the assistant to be deployed on an existing phone number. I'd like to know if you have any resources for this or what are the ways of achieving this, thanks.

To connect your Vapi assistant to your client's existing business phone number, set up call forwarding from the business number to your Vapi (Twilio) number. For example, in most phone systems, you can configure forwarding like this:

Forward all calls to: +1XXXXXXXXXX  # (your Vapi/Twilio number)

Once set, any call to the business number will be answered by your Vapi assistant. For more details, see the [Vapi phone calling docs](https://docs.vapi.ai/phone-calling). Source: - [Phone Calling](https://docs.vapi.ai/phone-calling)

Hello, There are two main ways to handle this with an existing business phone number through Twilio SIP integration: 1. Using Twilio SIP Trunking: a) Set up a Twilio Elastic SIP Trunk: - Create a new trunk in your Twilio account - Configure the termination settings - Whitelist Vapi's SIP server IPs: - 44.229.228.186 - 44.238.177.138 b) Move the existing business number to the SIP trunk - Transfer the existing number to this trunk in Twilio c) Configure Vapi side: - Create a SIP trunk credential - Register the phone number with Vapi - Link the number to your assistant 2. Using Call Forwarding: The client can simply forward their existing business number to the Vapi-provided number. This is often the simplest solution as it requires no technical setup. The SIP trunking solution provides a more robust and professional setup

Message marked as helpful by @ManjarulCh_! 🎉

thank you for the detailed response, this was extremely helpful. I'll be trying this out within these few days, if I have anu questions, I'll leave it here. Either ways really appreciated your response!

Thanks. Please let us know if you need further assistance.