<p>Shame on me -__-</p>
<p>It was mistake in my config, i forgot to set <code>$var(nu)</code></p>
<pre><code># get user name
$var(nu) = $rU;
</code></pre>
<p>so fixed kamailio.cfg:</p>
<pre><code>...
request_route {
    if($rU=~"^(z\#)[0-9][0-9]{1,20}$"){
        # get user name
        $var(nu) = $rU;

        # get normal DestNum without prefix
        $var(nuu) = $(var(nu){s.strip,2});

        #set FROM Caller ID /TEST/
        # @TODO: Set from callerID HERE
        $fU = "74951277197";

        # new sip uri
        $ru = "sip:" + $var(nuu) + "@sip.zadarma.com";
        route(RELAY);
    }
...
</code></pre>

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