You are running an Asterisk version for SIP TCP ?<div><br></div><div>your SIP UA seems talking SIP over TCP</div><div><br></div><div><div>Via: SIP/2.0/TCP <a href="http://192.168.1.15:56298">192.168.1.15:56298</a></div><div>

Max-Forwards: 70</div><div>From: &lt;sip:56@trixbox1.local&gt;;tag=2baacde98c;epid=aa3c1b27a7</div><div>To: &lt;sip:MRASLoc.trixbox1.local@trixbox1.local&gt;</div><div>Call-ID: 28a90e7402da49159f343be9bc82b4d0</div><div>
CSeq: 1 SERVICE</div>
<div>Contact: &lt;sip:56@trixbox1.local:56298;maddr=192.168.1.15;transport=tcp&gt;;proxy=replace;+sip.instance=&quot;&lt;urn:uuid:1ADF8582-5BD5-531A-BC2A-C76FECED0C4E&gt;&quot;</div><div>User-Agent: UCCAPI/2.0.6362.67</div>

<div>Authorization: Digest username=&quot;56&quot;, realm=&quot;asterisk&quot;, algorithm=MD5, uri=&quot;sip:MRASLoc.trixbox1.local@trixbox1.local&quot;, nonce=&quot;36662fdf&quot;, response=&quot;d6f90f263010891a42b3f7d46113796a&quot;</div>

<div>Content-Type: application/msrtc-media-relay-auth+xml</div><div>Content-Length: 395</div>-- <br>--<br>Adrià Vidal<br><br><br>
</div>