## Documentation Index

Fetch the complete documentation index at: [/llms.txt](https://docs.cognigy.com/llms.txt)

Use this file to discover all available pages before exploring further.

## Description

- As of Cognigy.AI 4.96.0, AudioCodes Nodes and Generic Voice Nodes are deprecated. Flows with these Nodes continue to work, and you can still edit and clone them as well as export them as a Package. However, you can’t create new ones in Cognigy.AI 4.96 or later.
- The full removal of AudioCodes Nodes is planned for Q2 2026. After the removal, AI Agents using these Nodes will stop working properly. We strongly recommend migrating to [Voice Gateway Nodes](https://docs.cognigy.com/ai/agents/develop/node-reference/voice/voice-gateway/overview) before the removal date.

The Transfer Node lets you pass an active call to a tel or sip target.

| Parameter | Type | Description |
| --- | --- | --- |
| Reason | CognigyScript | The reason for the handover. Will show in VG/AC logs |
| Transfer Destination | CognigyScript | E.164 syntax or a SIP URI are supported |
| Referred By | String | This parameter is optional.<br> This setting allows you to change the original Referred By value, which can be a SIP URI or a user identifier such as a phone number. To define the Referred By value, you can use the following patterns:<br>\- **SIP URI** \- `sip:[referred-by]@custom.domain.com`. In this case, the entire SIP URI will be sent as the Referred-By header. Example: `"Referred-by": "sip:CognigyOutbound@custom.domain.com".<br>\- **User Identifier** \- `sip:[referred-by]@[SIP FROM Domain from carrier config]`. Example, `"Referred-By": "sip:CognigyOutbound@sip.cognigy.ai"`. |
| Custom SIP Headers | JSON | Array of objects listing SIP headers that should be sent to the transferee. Each object comprises a name and a value attribute. |

Last modified on June 15, 2026