<p></p>
<p dir="auto">My cfg file is written like this ：<br>
$du = "sip:"+$rd+":"+$rp+";transport=tcp";<br>
<a target="_blank" rel="noopener noreferrer" href="https://user-images.githubusercontent.com/16113837/160795856-945514d5-b36b-4b1a-95a1-41d60bf0de7a.png"><img src="https://user-images.githubusercontent.com/16113837/160795856-945514d5-b36b-4b1a-95a1-41d60bf0de7a.png" alt="image" style="max-width: 100%;"></a></p>
<p dir="auto">when i use<br>
$du = "sip:"+$rd+":"+$rp+";transport=udp";<br>
the sip message will be normal<br>
<a target="_blank" rel="noopener noreferrer" href="https://user-images.githubusercontent.com/16113837/160796099-0d498eb2-e6a8-4703-9f4a-0e7d9b069bef.png"><img src="https://user-images.githubusercontent.com/16113837/160796099-0d498eb2-e6a8-4703-9f4a-0e7d9b069bef.png" alt="image" style="max-width: 100%;"></a><br>
excuse me, can you tell me the reason ?</p>

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