# Enable outbound calling - custom Twilio SIP trunk pls

**URL:** <https://community.retellai.com/t/enable-outbound-calling-custom-twilio-sip-trunk-pls/2586>\
**Category:** Support Help\
**Tags:** telephony\
**Created:** [May 6, 2026, 12:16am UTC](https://community.retellai.com/t/enable-outbound-calling-custom-twilio-sip-trunk-pls/2586 "2026-05-06T00:16:44Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![danteaguilera.yolo](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/danteaguilera.yolo/32/1782_2.png) [@danteaguilera.yolo](https://community.retellai.com/u/danteaguilera.yolo)\
**Post date:** [May 6, 2026, 12:16am UTC](https://community.retellai.com/t/enable-outbound-calling-custom-twilio-sip-trunk-pls/2586/1 "2026-05-06T00:16:44Z")

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Hi Retell team,

I’m on the Pay As You Go plan and I have a custom Twilio Elastic SIP Trunk fully configured (Termination URI, Origination URI pointing to [sip.retellai.com](http://sip.retellai.com), and IP ACL whitelisting Retell’s SBC block 18.98.16.120/30).

Outbound calls are not connecting, no error is shown, the call just doesn’t go through.

Could you please enable outbound calling for my account? I need it for a Mexican phone number connected via custom telephony.

Thank you!

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**Author:** ![Shah-Fazal](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/shah-fazal/32/2522_2.png) [@Shah-Fazal](https://community.retellai.com/u/Shah-Fazal)\
**Post date:** [May 6, 2026, 1:27pm UTC](https://community.retellai.com/t/enable-outbound-calling-custom-twilio-sip-trunk-pls/2586/2 "2026-05-06T13:27:46Z")

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Hey @danteaguilera.yolo

Can you share those Call IDs?

Thank You

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<div class="post-metadata">

**Author:** ![danteaguilera.yolo](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/danteaguilera.yolo/32/1782_2.png) [@danteaguilera.yolo](https://community.retellai.com/u/danteaguilera.yolo)\
**Post date:** [May 6, 2026, 1:45pm UTC](https://community.retellai.com/t/enable-outbound-calling-custom-twilio-sip-trunk-pls/2586/3 "2026-05-06T13:45:03Z")

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Sure:  
call\_d36d66e8d252958130b2076e7c5  
call\_9a5ed90f1e2e7d48b6c25ff7dd1  
call\_04a794c26ba232e2fe947462ad6  
call\_166cd3bce8aa6ad9ed7c58cfa7f

Thank you

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<div class="post-metadata">

**Author:** ![Shah-Fazal](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/shah-fazal/32/2522_2.png) [@Shah-Fazal](https://community.retellai.com/u/Shah-Fazal)\
**Post date:** [May 6, 2026, 1:45pm UTC](https://community.retellai.com/t/enable-outbound-calling-custom-twilio-sip-trunk-pls/2586/4 "2026-05-06T13:45:53Z")

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Hey @danteaguilera.yolo

I’ve escalated this to our team for further review.

We’ll update you as soon as we hear back.

Best regards

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<div class="post-metadata">

**Author:** ![Shah-Fazal](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/shah-fazal/32/2522_2.png) [@Shah-Fazal](https://community.retellai.com/u/Shah-Fazal)\
**Post date:** [May 6, 2026, 2:31pm UTC](https://community.retellai.com/t/enable-outbound-calling-custom-twilio-sip-trunk-pls/2586/5 "2026-05-06T14:31:47Z")

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Hey @danteaguilera.yolo

There is no username and password to make an outbound call.

Please use this guide ([Twilio - Retell AI](https://docs.retellai.com/deploy/twilio)) its a step by step guide to connect to your Twilio account via SIP trunking.

Thank You

 ![image](https://canada1.discourse-cdn.com/flex008/uploads/retell1/original/2X/1/1d2b7df0f1720b56519681441027a4ee96a47967.png)

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<div class="post-metadata">

**Author:** ![danteaguilera.yolo](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/danteaguilera.yolo/32/1782_2.png) [@danteaguilera.yolo](https://community.retellai.com/u/danteaguilera.yolo)\
**Post date:** [May 6, 2026, 3:34pm UTC](https://community.retellai.com/t/enable-outbound-calling-custom-twilio-sip-trunk-pls/2586/6 "2026-05-06T15:34:05Z")

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Right! Now it works! Thanks a lot!