This is Kanishk from Accident Centers of Texas, and we are using your ai voice assistant from some time for testing according to our needs. We are interested in using Vapi for our enterprise and really want to work further with your product. We want to use it for scheduling appointments. Currently our organisation has SPECTRUM VOIP numbers. As I saw on your dashboard that spectrum number importing is not supported on your platform and it is not possible for us to port or use another provider like Twilio because our spectrum numbers have been used for more than 10 years. Is there a way around this?Can we directly integrate our Spectrum number on VAPI if we take the enterprise plan?

Hi Kanishk! 👋 Thanks for reaching out about integrating your Spectrum VOIP numbers with Vapi. I understand that you can't port your Spectrum numbers since they've been in use for over 10 years, and direct importing isn't supported. While I can't confirm if the enterprise plan specifically allows direct integration with Spectrum numbers, I can definitely share several alternative integration methods that could work for you. Here are some ways you can integrate your Spectrum VOIP numbers with Vapi: 1. **SIP Trunking**: If Spectrum supports SIP trunking, you can configure your PBX to point to Vapi's SIP endpoint. This involves setting up the

sipUri

attribute within the

forwardingPhoneNumbers

array to specify the destination SIP address in your call flow. [According to our documentation](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334251359519641692), you'll need to ensure your PBX handles SIP REFER messages. 2. **Call Forwarding**: You can set up call forwarding to forward calls from your Spectrum numbers to Vapi. This uses the

forwardingPhoneNumbers

attribute to specify the destination for forwarded calls. [This is mentioned in our documentation](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1336375228703707176). 3. **Using a PBX**: You can create a new trunk in your PBX specifically for Vapi, configure it with Vapi's SIP details, and set up your application to route calls between your PBX and Vapi. [This approach is documented here](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1333747605628391434). 4. **API-Based Integration**: You can integrate with Vapi using a server-side SDK or the Vapi REST API to initiate sessions and handle audio streams. [Our API documentation](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1329523231375495260) provides endpoints for managing calls and audio streams.

Message marked as helpful by @ACT Clinic! 🎉

Ok I will try these methods and get back to you, It would be great if we can get on a call , I have to discuss other issues too

Hey Kanishk, First of all thanks for using VAPI. Secondly to use your own SPECTRUM voice over IP numbers you can check out the documentation below. How to integrate numbers using SIP trunking. And lastly for enterprise plan discussion or queries please DM me we will take it over DM. Refer to the following guides that demonstrate how to establish a connection with your SIP provider. Note: While these guides use Twilio as an example, the process remains consistent across other telephony providers.