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I got telephony permssion denied issue and on ask...
# ❓・ai-evy-support
t
@AI Evy I got telephony permssion denied issue and on asking telnyx they said Issue Description: Outbound call is failing with 403 unverified caller ID. Findings: Caller Id used is active on the user x account. But, connection ID being used is active under a different telnyx account. retell AI setup needs to be reviewed. Need to program a connection ID on the same account using the telnyx caller ID -what's the issue?
a
Thanks for tagging me @trx598. I'll look through relevant sources and get back to you shortly.
​ To learn more, see the sources I considered: [[1] Telnyx](https://docs.retellai.com/deploy/telnyx) ​
Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.
### Answer The issue is a mismatch between your Telnyx accounts. Your caller ID (phone number) is on one Telnyx account, but the SIP trunk/connection ID you configured in Retell is associated with a different Telnyx account. [(1) ]() To fix this: 1. Ensure the Elastic SIP Trunk you created in Telnyx is on the same Telnyx account where your phone number lives 2. When setting up the trunk in Telnyx, verify the number is moved to that specific trunk 3. When importing the number to Retell, supply the correct termination SIP URI, username, and password from that same Telnyx account The Telnyx setup requires: - Creating the trunk with FQDN 
sip.retellai.com
- Setting up outbound authentication credentials - Moving your numbers to that elastic SIP trunk - Importing the number to Retell with Telnyx's FQDN as the termination SIP URI (e.g., 
sip.telnyx.com
based on your SIP region) You may need to delete the imported number from Retell and re-import it after correcting the Telnyx configuration to ensure everything is on the same account.
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