---
title: "Changes to Start Conversation Relay"
method: POST
path: "/calls/{call_control_id}/actions/conversation_relay_start"
---

# Changes to Start Conversation Relay

`POST /calls/{call_control_id}/actions/conversation_relay_start`

> Every recorded change to this operation, newest first.
> 152 revisions in range; 1 not diffed.

## Timeline

Changed in 5 of 152 revisions.

- **2026-10-15** `da303e40b51e`: 2 breaking, 9 info
- **2026-09-25** `d8b8159753ee`: 6 info
- **2026-09-16** `a6a61a29ecdd`: 3 breaking, 3 info
- **2026-08-17** `1571b0380bd7`: 3 breaking
- **2026-08-04** `8f5f4e537994`: 4 breaking

## Changes

- **2026-10-15** `da303e40b51e`: 2 breaking, 9 info
  - added `subschema #1` to the request body `allOf` list
  - removed `subschema #1, subschema #2, subschema #3` from the request body `anyOf` list
  - added the new optional request property `conversation_relay_settings/languages/items/transcription_engine_config/eager_eot_threshold`
  - added the new optional request property `conversation_relay_settings/languages/items/transcription_engine_config/eot_threshold`
  - added the new optional request property `conversation_relay_settings/languages/items/transcription_engine_config/interim_results`
  - added the new optional request property `languages/items/transcription_engine_config/eager_eot_threshold`
  - added the new optional request property `languages/items/transcription_engine_config/eot_threshold`
  - added the new optional request property `languages/items/transcription_engine_config/interim_results`
  - added the new optional request property `transcription_engine_config/eager_eot_threshold`
  - added the new optional request property `transcription_engine_config/eot_threshold`
  - added the new optional request property `transcription_engine_config/interim_results`
- **2026-09-25** `d8b8159753ee`: 6 info
  - added `soniox` discriminator mapping keys to the `conversation_relay_settings/languages/items/voice_settings` request property
  - added `soniox` discriminator mapping keys to the `languages/items/voice_settings` request property
  - added `soniox` discriminator mapping keys to the `voice_settings` request property
  - added `#/components/schemas/SonioxVoiceSettings` to the `conversation_relay_settings/languages/items/voice_settings` request property `oneOf` list
  - added `#/components/schemas/SonioxVoiceSettings` to the `languages/items/voice_settings` request property `oneOf` list
  - added `#/components/schemas/SonioxVoiceSettings` to the `voice_settings` request property `oneOf` list
- **2026-09-16** `a6a61a29ecdd`: 3 breaking, 3 info
  - removed `#/components/schemas/RimeVoiceSettings` from the `conversation_relay_settings/languages/items/voice_settings` request property `oneOf` list
  - removed `#/components/schemas/RimeVoiceSettings` from the `languages/items/voice_settings` request property `oneOf` list
  - removed `#/components/schemas/RimeVoiceSettings` from the `voice_settings` request property `oneOf` list
  - removed `rime` discriminator mapping keys from the `conversation_relay_settings/languages/items/voice_settings` request property
  - removed `rime` discriminator mapping keys from the `languages/items/voice_settings` request property
  - removed `rime` discriminator mapping keys from the `voice_settings` request property
- **2026-08-17** `1571b0380bd7`: 3 breaking
  - the response's body type changed from `object` to no type for status `default`
  - the `errors/items/` response's property type changed from `object` to no type for status `default`
  - the `errors/items/code` response's property type changed from `integer` to `string`, and format from `int32` to `integer` for status `default`
- **2026-08-04** `8f5f4e537994`: 4 breaking
  - the response's body type changed from no type to `object` for status `default`
  - the `errors/items/` response's property type changed from no type to `object` for status `default`
  - the `errors/items/code` response's property type changed from `string` to `integer`, and format from `integer` to `int32` for status `default`
  - the `errors/items/source/pointer` response's property format changed from `json-pointer` to no format for status `default`

---

[Operation](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/docs/calls/:call_control_id/actions/conversation_relay_start/post.md) - [API](https://skmtc.dev/team-telnyx/apis/telnyx-api-2.md) - [Page](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/changes/calls/:call_control_id/actions/conversation_relay_start/post)