Take a look at the following documentation.&nbsp; Take special note of 'substr'<br /><br /><a
href="http://openser.org/dokuwiki/doku.php/transformations:1.2.x">http://openser.org/dokuwiki/doku.php/transformations:1.2.x</a><br
/><br />Regards,<br />Norm<br /><br /><br />&gt; Hi all, <br />&gt; <br />&gt; I am trying to
re-write the from_uri ($fU) for all calls coming from my <br />&gt; Asterisk server before sending
it to the PSTN. I usually prefix the ANI in <br />&gt; asterisk with &quot;222&quot; to route it
to openser, and then openser simply <br />&gt; forwards the call to the PSTN. The problem is that
222+ANI appears as my <br />&gt; caller id and is unacceptable. Can anyone give me hint to strip
out this <br />&gt; prefix in openser. <br />&gt; <br />&gt; Thanks. <br />&gt; <br />&gt; Tolu
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