# Inbound dial-to-SIP stuck at registered, never connects — gated on free trial / no card?

**URL:** <https://community.retellai.com/t/inbound-dial-to-sip-stuck-at-registered-never-connects-gated-on-free-trial-no-card/3189>\
**Category:** Support Help\
**Tags:** telephony\
**Created:** [June 24, 2026, 9:13pm UTC](https://community.retellai.com/t/inbound-dial-to-sip-stuck-at-registered-never-connects-gated-on-free-trial-no-card/3189 "2026-06-24T21:13:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![masudur](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/masudur/32/2194_2.png) [@masudur](https://community.retellai.com/u/masudur)\
**Post date:** [June 24, 2026, 9:13pm UTC](https://community.retellai.com/t/inbound-dial-to-sip-stuck-at-registered-never-connects-gated-on-free-trial-no-card/3189/1 "2026-06-24T21:13:53Z")

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Inbound calls via **dial-to-SIP** (provider: **46elks** ). Flow: `register-phone-call` → get `call_id` → 46elks dials `sip:<call_id>@sip.retellai.com;transport=tcp`.

Every call fails: stays `call_status: registered`, `disconnection_reason: null`, caller hears silence.

Already ruled out: valid `call_id` ✅, `;transport=tcp` ✅, dialed instantly (no timeout) ✅, G.711 codec ✅, and 46elks confirms no blocks on their side (_“fails when connecting to Retell”_).

Account: **Free Trial, ~$9 credit, no card added.**

**Questions:**

1. Does inbound custom telephony (dial-to-SIP) **require a card on file** , even with trial credit? Is that why calls register but never connect?
2. Does custom telephony need to be **enabled on the workspace** — and how?

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**Author:** ![colinproctor11](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/colinproctor11/32/165_2.png) [@colinproctor11](https://community.retellai.com/u/colinproctor11)\
**Post date:** [June 24, 2026, 11:39pm UTC](https://community.retellai.com/t/inbound-dial-to-sip-stuck-at-registered-never-connects-gated-on-free-trial-no-card/3189/3 "2026-06-24T23:39:23Z")

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Hey @masudur ,

With a free trial, you are unable to make live calls to our sip domain. We will throw an error that says → `register-phone-call failed: 402 {“status”:“error”,“message”:“Trial over quota, please add payment.”}`

To answer your questions,

1. Yes dial to SIP method requires a card on file.

2. Custom telephony is automatically enabled for each account that is created.

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**Author:** ![TONNIC](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/tonnic/32/131_2.png) [@TONNIC](https://community.retellai.com/u/TONNIC)\
**Post date:** [June 25, 2026, 2:05am UTC](https://community.retellai.com/t/inbound-dial-to-sip-stuck-at-registered-never-connects-gated-on-free-trial-no-card/3189/4 "2026-06-25T02:05:21Z")

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If you want the full capabilities, definitely add a credit card. Also want to verify your identity if you want to do any outbound at all.