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<p class="MsoNormal">If the transfer is using SIP REFER, the carrier/switch (equipment that sends call into Asterisk) would be required to support it.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">SIP REFER tends to be used with switch vendors as opposed to SIP providers.<o:p></o:p></p>
<p class="MsoNormal">Not sure if there are any SIP providers who support the REFER feature.
<o:p></o:p></p>
<p class="MsoNormal">Generally, SIP REFER requires SIP Provider or Switch equipment to perform an internal patch/bridge for the 2 parties to hear each other.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dan<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> asterisk-dev <asterisk-dev-bounces@lists.digium.com>
<b>On Behalf Of </b>John Bittner<br>
<b>Sent:</b> Monday, September 12, 2022 12:11 AM<br>
<b>To:</b> asterisk-dev@lists.digium.com<br>
<b>Subject:</b> [External] [asterisk-dev] Out of the media call forwarding.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif">Hello,
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif">Having an issue with call delay and it got more noticeable as more an more customers start to forward there inbound calls to cell phones. Calling from cell to office then
transfer to another cell has the most delays.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif">To avoid this I am trying to figure out how to get out of the audio stream and transfer via the carrier. I tried a few options, like asterisk transfer feature that works great
from asterisk to asterisk but not directed to a carrier. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif">Do I need to get the carrier to enable a feature to do this ?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif">Anyone know the best way to solve this problem. I have researched this and cant find a solid answer. Is sip redirect the answer ?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif">Any help is much appreciated.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif">John Bittner<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Segoe UI",sans-serif">Xaccel<o:p></o:p></span></p>
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