Thank you for your responses. Actually I was missing parenthesis () in regular expression, so the variable $1 was empty. <br><br>The correction was made here:<br><br>&lt;extension name=&quot;vmenu&quot;&gt;<br>
    &lt;condition field=&quot;destination_number&quot; expression=&quot;^vm-.*$&quot;&gt;<br>    &lt;action application=&quot;voicemail&quot; data=&quot;check default ${domain_name} $1&quot;/&gt;<br>    &lt;/condition&gt;<br>

    &lt;/extension&gt;<br><br>To this:<br><br>&lt;extension name=&quot;vmenu&quot;&gt;<br>
    &lt;condition field=&quot;destination_number&quot; expression=&quot;^vm-(.*)$&quot;&gt;<br>    &lt;action application=&quot;voicemail&quot; data=&quot;check default ${domain_name} $1&quot;/&gt;<br>    &lt;/condition&gt;<br>

    &lt;/extension&gt;<br><br>It works with mailbox param as well. Thank you very much!<br><br><br><br><div class="gmail_quote">2012/2/20 Brian West <span dir="ltr">&lt;<a href="mailto:brian@freeswitch.org" target="_blank">brian@freeswitch.org</a>&gt;</span><br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">&lt;user id=&quot;jano&quot; number-alias=&quot;502&quot;&gt; <div><br></div><div>/b</div>

<div><div><br><div><div>On Feb 17, 2012, at 5:22 AM, Ján Hrnko wrote:</div><br><blockquote type="cite"><span style="border-collapse:separate;font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium">&lt;user id=&quot;jano&quot; mailbox=&quot;502&quot;&gt;<span> </span></span></blockquote>

</div><br></div><span><font color="#888888"><div>
<span style="text-indent:0px;letter-spacing:normal;font-variant:normal;text-align:-webkit-auto;font-style:normal;font-weight:normal;line-height:normal;border-collapse:separate;text-transform:none;font-size:medium;white-space:normal;font-family:Helvetica;word-spacing:0px">-- <br>

Brian West <br>FreeSWITCH Solutions, LLC<br>Phone: <a href="tel:%2B1%20%28918%29%20420-9266" value="+19184209266" target="_blank">+1 (918) 420-9266</a> <br>Fax:   <a href="tel:%2B1%20%28918%29%20420-9267" value="+19184209267" target="_blank">+1 (918) 420-9267</a><br>

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