I have the same problem. An external gateway is returning 486 to FS but FS returns 480 to the caller... I am testing following dialplan:<div><br></div><div><div>    &lt;extension name=&quot;elastix&quot;&gt;</div><div>      &lt;condition field=&quot;destination_number&quot; expression=&quot;^77.+$&quot;&gt;</div>

<div>        &lt;action application=&quot;bridge&quot; data=&quot;sofia/gateway/elastix16/8888&quot;/&gt;</div><div>      &lt;/condition&gt;</div><div>    &lt;/extension&gt;</div><div><br></div><div><br></div><br><div class="gmail_quote">

2012/1/5 Peter P GMX <span dir="ltr">&lt;<a href="mailto:Prometheus001@gmx.net">Prometheus001@gmx.net</a>&gt;</span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

Hello,<br>
<br>
I have a strange phenomen:<br>
<br>
When a target UA is busy, it returns &quot;486 Busy&quot; to Freeswitch. But<br>
Freeswitch then returns &quot;480 Temporarily Unavailable&quot; to the called party.<br>
Where does this come from and how can I change this behaviour?<br>
<br>
See (anonymized) SIP trace with ngrep:<br>
<br>
UA to Freeswitch:<br>
========================<br>
U 2012/01/04 13:59:44.928775 &lt;fritzbox-IP&gt;:5060 -&gt; &lt;freeswitch-IP&gt;:5080<br>
SIP/2.0 486 Busy Here.<br>
Via: SIP/2.0/UDP<br>
&lt;freeswitch-IP&gt;:5080;rport=5080;branch=z9hG4bKNZZDv0Syp4eyr.<br>
From: &quot;026xxxxxxxx&quot; &lt;sip:026xxxxxxxx@&lt;freeswitch-IP&gt;&gt;;tag=py094Kv7vr03a.<br>
To:<br>
&lt;sip:069xxxxxxxx@&lt;fritzbox-IP&gt;;uniq=B05FE4881A55AEEB69361EFA327DB&gt;;tag=E1C3374B97DAB2DE.<br>
Call-ID: d0d0d057-b176-122f-1f8d-001ec9b9da3c.<br>
CSeq: 22504928 INVITE.<br>
User-Agent: AVM FRITZ!Box 6360 Cable 85.05.07 (Sep 14 2011).<br>
Content-Length: 0.<br>
<br>
Freeswitch to Caller:<br>
========================<br>
U 2012/01/04 13:59:44.930387 &lt;freeswitch-IP&gt;:5060 -&gt; &lt;Sip-provider-IP&gt;:5060<br>
SIP/2.0 480 Temporarily Unavailable.<br>
Via: SIP/2.0/UDP &lt;Sip-provider-IP&gt;:5060;branch=z9hG4bK-4896-2830DFA.<br>
From:<br>
&lt;<a href="mailto:sip%3A4926xxxxxxxx@sip.provider.de">sip:4926xxxxxxxx@sip.provider.de</a>;user=phone&gt;;tag=13517-HB-08a98588-2622da197.<br>
To: &lt;sip:4969xxxxxxxx@&lt;freeswitch-IP&gt;;user=phone&gt;;tag=XQtc5US24QgDa.<br>
Call-ID: <a href="mailto:13517-SG-08a98587-0a352e121@sip.provider.de">13517-SG-08a98587-0a352e121@sip.provider.de</a>.<br>
CSeq: 134781549 INVITE.<br>
User-Agent: FreeSWITCH-mod_sofia/1.0.head-git-68627e8 2011-11-21<br>
13-52-28 -0600.<br>
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO,<br>
REGISTER, REFER, NOTIFY.<br>
Supported: precondition, path, replaces.<br>
Allow-Events: talk, hold, refer.<br>
Content-Length: 0.<br>
P-Asserted-Identity: &quot;069xxxxxxxx&quot; &lt;sip:069xxxxxxxx@&lt;freeswitch-IP&gt;&gt;.<br>
<br>
Best regards<br>
Peter<br>
<br>
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</blockquote></div><br></div>