<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I'm almost 100% positive its _sip._tls. its what I used in my testing with polycoms and snoms to direct the phone to use TLS.<div><br></div><div>/b</div><div><div><br><div><div>On Mar 6, 2010, at 10:24 AM, Madovsky wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div><div># NAPTR for SIP over TLS</div><div><a href="http://example.com/">example.com</a><span class="Apple-converted-space"> </span>NAPTR 20 100 "S" "SIPS+D2T" "" _sip<font color="#ff0000">s</font>._tcp.example.com.</div></div><blockquote style="border-left-color: rgb(0, 0, 0); border-left-width: 2px; border-left-style: solid; padding-left: 5px; padding-right: 0px; margin-left: 5px; margin-right: 0px; "><br class="Apple-interchange-newline"></blockquote></span></blockquote></div><br></div></div></body></html>