<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">I'm sure this topic has been discussed to death, but I haven't found a comprehensive answer yet...<DIV><BR class="khtml-block-placeholder"></DIV><DIV>I have a very large installation of Cisco Call Managers connecting directly local and LD T1's for service.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I would like to replace some of my LD T1's with IP trunks (or something like that). I would need low-cost domestic and international LD... but quality and reliability is our top priority, so we're not simply looking for low-bid. I assume IAX2 is the protocol I should use, but who are the major players in providing this type of service?</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Thanks!<BR><DIV> <P style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px"><BR></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica"><SPAN class="Apple-converted-space"> </SPAN>- matthewk (MSK2)</FONT></P><DIV><BR class="khtml-block-placeholder"></DIV> </DIV><BR></DIV></BODY></HTML>