<p>The 3261 specification states that the double quotation mark ( " ) is a <em>reserved</em> character. If you want that character within the SIP username of an URI, you should use the escaped form <em>%22</em></p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">&mdash;<br>Reply to this email directly or <a href="https://github.com/OpenSIPS/opensips/issues/288#issuecomment-51308292">view it on GitHub</a>.<img alt="" height="1" src="https://github.com/notifications/beacon/5479561__eyJzY29wZSI6Ik5ld3NpZXM6QmVhY29uIiwiZXhwaXJlcyI6MTcyMjkzMzg3OCwiZGF0YSI6eyJpZCI6Mzg5MjUzNTF9fQ==--3f7e36f1f7a07f520159ca95d9c35375a0ff0448.gif" width="1" /></p>