### Answer Yes, this is possible using Retell AI's custom telephony integration methods. You have two options: *Option 1: Elastic SIP Trunking (Recommended) * [(1) ]() If your telephony provider (the one underlying GoHighLevel) supports elastic SIP trunking, you can configure the number to point to a SIP trunk and import that number to Retell for voice calls while keeping SMS functionality with GoHighLevel. Option 2: Dial to SIP URI If elastic SIP trunking isn't supported or you have a more complicated setup, you can use the "Dial to SIP URI" method. This requires your system to dial calls to Retell's SIP URI: - Retell SIP server URI:

sip:sip.retellai.com

With this method, you would call the Register Phone Call API to get a

call_id

, then use the SIP URI format:

sip:{call_id}@sip.retellai.com

Important considerations: - The specific implementation depends on whether GoHighLevel (or its underlying telephony provider like Twilio, Telnyx, etc.) supports SIP trunking or SIP routing. - With the Dial to SIP URI method, you won't be able to use Retell's built-in transfer call feature—you'd need to implement your own transfer logic. Check out these potentially useful sources for setup details: - [Custom Telephony Overview]() - [Telnyx Setup Guide]()

​ To learn more, see the sources I considered: [[1] Custom Telephony Overview](https://docs.retellai.com/deploy/custom-telephony) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

### Answer I don't have documentation that specifically addresses using a Retell-purchased phone number for SMS through external platforms like GoHighLevel. The available sources cover: - Importing your own numbers into Retell via SIP trunking for voice calls [(1) ]() - Retell's own SMS capabilities for AI text agents [(2) ]() - Phone number management within Retell [(3) ]() However, there's no information about exporting or sharing Retell phone numbers with third-party SMS platforms. Check out these potentially useful sources: - [Custom Telephony Overview]() - [Update Phone Number]() I'd recommend reaching out to Retell support directly for this specific use case: - Visit [Contact Sales]() - Check [Retell AI GitHub]() Would you like me to provide a general answer based on typical telephony practices?

​ To learn more, see the sources I considered: [[1] Custom Telephony Overview](https://docs.retellai.com/deploy/custom-telephony) [[2] Platform Changelogs | Retell AI](https://www.retellai.com/changelog) [[3] Update Phone Number](https://docs.retellai.com/api-references/update-phone-number) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

### Answer Your concern is valid. The Verified Phone Number and Branded Caller ID features you have on your Retell number are specifically designed to prevent your calls from being flagged as "Spam Likely" and to display your business name to recipients. [(1) ]() [(2) ]() Key points about these features: - Verified Phone Number ensures your number is authenticated and approved by major carriers like T-Mobile, AT&T, and Verizon, preventing the "Spam Likely" or "Unknown" tag. [(3) ]() - Branded Caller ID displays your business name instead of just a phone number when making calls, which increases trust and call answer rates. [(2) ]() The limitation: Both Verified Phone Number and Branded Caller ID are currently only available for U.S. numbers and are applied through Retell's dashboard to numbers managed within Retell. [(1) ]() [(2) ]() For Branded Caller ID specifically, it currently only supports Retell Twilio numbers. [(4) ]() If you use a different number from GoHighLevel for calls, you would lose these verification and branding benefits unless that number also goes through a similar verification process with its own provider. Possible approach: If you want to keep your Retell number's verified/branded status for calls, you might consider using the Retell number as your primary calling number and routing SMS through GoHighLevel using a different workflow—though I don't have documentation on whether Retell numbers can be shared for SMS with external platforms. Chec

k out these potentially useful sources: - [Apply for verified phone number]() - [Apply for branded call]() - [Boost Trust with Verified Phone Numbers]()

​ To learn more, see the sources I considered: [[1] Apply for verified phone number](https://docs.retellai.com/build/telephony/verified-phone) [[2] Apply for branded call](https://docs.retellai.com/build/telephony/branded-call) [[3] Boost Trust with Verified Phone Numbers | Retell AI](https://www.retellai.com/features/verified-phone-numbers) [[4] Enhance Trust with Branded Caller ID | Retell AI](https://www.retellai.com/features/branded-call-id) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

### Answer By default, Retell AI rings for *30,000 milliseconds (30 seconds) *. [(1) ]() This applies to both outbound call ring time and call transfer ring time. You can configure this using the

ring_duration_ms

parameter when creating or updating an agent: - Valid range: 5,000 ms (5 seconds) to 90,000 ms (90 seconds) - Default: 30,000 ms (30 seconds)

javascript
ring_duration_ms: 30000

​ To learn more, see the sources I considered: [[1] Create Voice Agent](https://docs.retellai.com/api-references/create-agent) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.