---
schema_version: "1"
id: 1eb4072bf59bfc008917e58ae70d90fc620c84b3d2e9859260dd2dee755e0ee2
title: Pass Context with Custom SIP Headers and Disconnect with REFER in Agentforce Voice
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/release-notes/264-0-0/rn_agentforce_voice_sip_headers.md
canonical_url: https://help.salesforce.com/s/articleView?id=release-notes.rn_agentforce_voice_sip_headers.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 1094bdea21ed51e5389b4efacec774cbb710830d9cdbe62f3444ef2c6a631c7b
description: Capture custom SIP X-headers from inbound calls to deliver contextual information, such as customer intent, language preference, or case history. Configure your escalation and fallback flows to return or modify headers using the SIP REFER method when disconnecting or transferring calls.
products:
  - Cross Cloud
release: "264"
---
# Pass Context with Custom SIP Headers and Disconnect with REFER in Agentforce Voice

Capture custom SIP X-headers from inbound calls to deliver contextual information, such as customer intent, language preference, or case history. Configure your escalation and fallback flows to return or modify headers using the SIP REFER method when disconnecting or transferring calls.

**Where:** This change applies to Lightning Experience in Enterprise, Unlimited, and Developer editions with Foundations or Agentforce 1 editions, and [Salesforce Voice add-ons](https://help.salesforce.com/s/articleView?id=service.voice_editions.htm&language=en_US).

**Why:** Previously, Agentforce Voice supported only the UUI SIP header for passing context and only SIP BYE for call disconnection. Now you can pass rich, named X-headers from your interactive voice response (IVR) into Salesforce flows. You can modify the headers before they’re sent back in the response. SIP REFER is now available as a disconnect method, giving you more flexible call transfer scenarios with your telephony partner.

**When:** This feature is available starting the week of September 7, 2026.

**How:** Turn on the **Include Custom SIP Headers and REFER Support** setting in Agentforce Voice Setup. To use the headers and SIP REFER, update the escalation flow for your agent, add a fallback autolaunched flow, and edit the inbound Omni-Channel flow for your agent.

#### See Also

- [_Salesforce Help_: Include Custom SIP Headers and REFER Support](https://help.salesforce.com/s/articleView?id=ai.agent_sip_headers.htm&language=en_US)