> ## Documentation Index
> Fetch the complete documentation index at: https://docs.oduist.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Auto Answer

> Configure conditional auto-answer for click-to-dial using SIP headers.

# Auto Answer

Auto-answer lets the first call leg auto-accept (click-to-dial) when a specific SIP header is present. This is conditional auto-answer, not unconditional.

Flow when dialing from Odoo:

1. Asterisk originates to user’s SIP channel.
2. When auto-answered, Asterisk dials the destination; user hears progress tone immediately (one-click).

Configure per user in PBX → Users (set Auto Answer Header).

## Phones supporting auto-answer headers

* **Zoiper (paid)**: `Call-Info:<sip:>;answer-after=0` — enable “Accept server-side auto answer”.
* **MicroSIP**: `Call-Info: Auto Answer` or `Call-Info: answer-after=0` or `X-AUTOANSWER: TRUE`.