Apparently this is not currently possible. I have submitted a patch on JIRA to add a new parameter to the subscriptions section named user-in-register, when set to true the username will be included in the request-uri. If/when this patch is approved I will update the wiki.<br>
<br><div class="gmail_quote">On Fri, Jul 13, 2012 at 1:34 PM, Duvid Rottenberg <span dir="ltr">&lt;<a href="mailto:adrottenberg@gmail.com" target="_blank">adrottenberg@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I am using embedded freeswitch as a softphone client and I am trying to subscribe to call-info on the server, (see config below) but the server is responding with a 481 Call/Transaction Does not exist.<div>I compared the freeswitch SIP messages with SIP messages sent by a polycom phone for this feature and  I noticed that freeswitch doesn&#39;t send the username in the request line. I think that this is causing the 481 response.</div>

<div><br><div>Polycom Version:</div><div><span style="font-size:10pt;font-family:Tahoma,sans-serif">SUBSCRIBE sip:user@server:5060;transport=udp
SIP/2.0</span></div><div>Freeswitch:</div><div>SUBSCRIBE sip:server:5060;transport=udp SIP/2.0</div><div><br></div><div>Below is my gateway configuration</div><div><div>&lt;gateway name=&#39;1&#39;&gt;</div><div>    &lt;param name=&#39;realm&#39; value=&#39;SIP_SERVER&#39; /&gt;</div>

<div>    &lt;param name=&#39;username&#39; value=&#39;SIP_USERNAME&#39; /&gt;</div><div>    &lt;param name=&#39;password&#39; value=&#39;SIP_PASSWORD&#39; /&gt;</div><div>    &lt;param name=&#39;register&#39; value=&#39;true&#39; /&gt;</div>

<div>    &lt;param name=&#39;extension&#39; value=&#39;SIP_USERNAME&#39; /&gt;</div><div>    &lt;param name=&#39;extension-in-contact&#39; value=&#39;true&#39; /&gt;</div><div>    &lt;subscriptions name=&#39;x&#39;&gt; </div>

<div>        &lt;subscription event=&#39;call-info&#39;&gt;</div><div>            &lt;param name=&#39;retry-seconds&#39; value=&#39;40&#39;/&gt;</div><div>            &lt;param name=&#39;expire-seconds&#39; value=&#39;3600&#39;/&gt;</div>

<div>            &lt;param name=&#39;content-type&#39; value=&#39;&#39;/&gt;</div><div>        &lt;/subscription&gt;                                            </div><div>    &lt;/subscriptions&gt;           </div><div>&lt;/gateway&gt;</div>

</div><div><br></div><div>Is there any way to tell freeswitch to include the username in the request line? </div></div><div><br></div><div>Thank You,</div><div>Duvid Rottenberg</div>
</blockquote></div><br>