System → SIP Account Management → Account x → General Account Settings → Page Auto Answer
Admin Settings → Line → (line) → Answer page
<sip_account>
<idx id="x">
<auto_answer_enable>VALIDVALUE</auto_answer_enable>
</idx>
</sip_account>
Enables or disables automatic answering of pages for account x.
0 (disabled), 1 (enabled)
0