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Standard Phone • snom • X-Lite, X-Pro, eyeBeam • Aastra Phone
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Standard Phone

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For most phone models no direct control is supported. These must be configured as [Secial Device] = "Standard". The call setup is made via "Originate" command of the Asterisk Manager Interface.
Free hand mode via Call-Info : Answer-After=0
Some SIP phones supports an Auto-Answer via INVITE SIP-Header "Call-Info Answer-After=0". To force the Asterisk PBX to send this addiational header, a special patch is necessary.
  1. copy patch file to your asterisk source dir and then run the following command:
  2. patch -p0 -i originate_auto_answer_1.x.patch

Ask your PBX vendor if this patch is supported.
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