<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">Run mtr on your server against the registration server at Teliax and look for bad hops on your route to and fro.<DIV><BR class="khtml-block-placeholder"></DIV><DIV>If you don't find anything there, you may want to fire up ethereal and capture packets on a few calls and look through them for error data that may be contributing to bad voice quality.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I hope this is helpful.</DIV><DIV><BR><DIV> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica Neue; font-size: 10px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica Neue; font-size: 10px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ; font-family: Helvetica; font-size: 12px; "><FONT class="Apple-style-span" face="Geneva"><SPAN class="Apple-style-span" style="font-family: Geneva; ; font-size: 12px; "><SPAN class="Apple-style-span" style="font-family: Geneva; font-size: 12px; "><SPAN class="Apple-style-span" style="font-family: Geneva; font-size: 12px; ">Bryan M. Johns</SPAN></SPAN></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ; font-family: Helvetica; font-size: 12px; "><FONT class="Apple-style-span" color="#666666" face="Geneva" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;; color: rgb(102, 102, 102); font-family: Geneva; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 10px; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; ">Partner</SPAN></SPAN></SPAN></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ; font-family: Helvetica; font-size: 12px; "><FONT class="Apple-style-span" color="#333333" face="Arial" size="2"><SPAN class="Apple-style-span" style="font-size: 10px;; color: rgb(51, 51, 51); font-family: Arial; "><B style="color: rgb(51, 51, 51); font-family: Arial; font-size: 10px; font-weight: bold; "><SPAN class="Apple-style-span" style="color: rgb(51, 51, 51); font-family: Arial; font-size: 10px; font-weight: bold; "><SPAN class="Apple-style-span" style="color: rgb(51, 51, 51); font-family: Arial; font-weight: bold; "><SPAN class="Apple-style-span" style="color: rgb(51, 51, 51); font-family: Arial; font-weight: bold; ">Shelton | Johns Technology Group</SPAN></SPAN></SPAN></B></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ; font-family: Helvetica; font-size: 12px; "><FONT class="Apple-style-span" color="#666666" face="Geneva" size="1"><SPAN class="Apple-style-span" style="font-size: 9px;; color: rgb(102, 102, 102); font-family: Geneva; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 9px; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 9px; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 9px; ">office: 678:248:2637 x:1500</SPAN></SPAN></SPAN></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ; font-family: Helvetica; font-size: 12px; "><FONT class="Apple-style-span" color="#666666" face="Geneva" size="1"><SPAN class="Apple-style-span" style="font-size: 9px;; color: rgb(102, 102, 102); font-family: Geneva; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 9px; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 9px; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 9px; ">direct: 678:229:1809</SPAN></SPAN></SPAN></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ; font-family: Helvetica; font-size: 12px; "><FONT class="Apple-style-span" color="#666666" face="Geneva" size="1"><SPAN class="Apple-style-span" style="font-size: 9px;; color: rgb(102, 102, 102); font-family: Geneva; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 9px; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 9px; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 9px; ">mobile: 404.259.9216</SPAN></SPAN></SPAN></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ; font-family: Helvetica; font-size: 12px; "><FONT class="Apple-style-span" color="#666666" face="Geneva" size="1"><SPAN class="Apple-style-span" style="font-size: 9px;; color: rgb(102, 102, 102); font-family: Geneva; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 9px; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 9px; "><SPAN class="Apple-style-span" style="color: rgb(102, 102, 102); font-family: Geneva; font-size: 9px; ">iaxtel: 700:248:2637 x:1500</SPAN></SPAN></SPAN></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ; font-family: Helvetica; font-size: 12px; "><A href="http://www.sheltonjohns.com/"><FONT class="Apple-style-span" face="Arial" size="1"><SPAN class="Apple-style-span" style="font-size: 9px;; color: rgb(0, 0, 238); font-family: Arial; -khtml-text-decorations-in-effect: underline; "><B style="color: rgb(0, 0, 238); font-family: Arial; font-size: 9px; font-weight: bold; -khtml-text-decorations-in-effect: underline; "><SPAN class="Apple-style-span" style="color: rgb(0, 0, 238); font-family: Arial; font-size: 9px; font-weight: bold; -khtml-text-decorations-in-effect: underline; "><SPAN class="Apple-style-span" style="color: rgb(0, 0, 238); font-family: Arial; font-size: 9px; font-weight: bold; -khtml-text-decorations-in-effect: underline; "><SPAN class="Apple-style-span" style="color: rgb(0, 0, 238); font-family: Arial; font-size: 9px; font-weight: bold; -khtml-text-decorations-in-effect: underline; ">http://www.sheltonjohns.com</SPAN></SPAN></SPAN></B></SPAN></FONT></A></DIV><BR class="Apple-interchange-newline"></SPAN></SPAN></SPAN></SPAN> </DIV><BR><DIV><DIV>On Feb 6, 2007, at 8:09 PM, Jim Duda wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I'm struggling to get my VOIP installation to be acceptable.<SPAN class="Apple-converted-space"> </SPAN>I'm looking for advice on what else I can look for.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">My system:</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">o Teliax VOIP service, voip-ny1 proxy</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">o RCN Cable Internet Service (3Mbps download, 500kbps upload, 6ms average jitter)</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">o 3.2 GHZ P4 Server (runs asterisk, firewall, other stuff)</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">o server lightly loaded</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">o Linux kernel 2.6.19.2</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">o Shorewall Firewall software with QOS configured for VOIP P1</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">o Asterisk 1.4.0</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">o Sipura SPA-2000</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">o Grandstream GXP-2000</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">o IAX connection to teliax</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Outbound voice quality is many times horrible, to the point where ppl say they cannot hear me.<SPAN class="Apple-converted-space"> </SPAN>The voice often drops out.<SPAN class="Apple-converted-space"> </SPAN>Inbound quality seems to cut in and out too.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I downloaded the myVoipSpeed VOIP analyzer.<SPAN class="Apple-converted-space"> </SPAN>It indicates that I have plenty of download and upload bandwidth.<SPAN class="Apple-converted-space"> </SPAN>I also have good jitter.<SPAN class="Apple-converted-space"> </SPAN>The tool doeesn't find any packet loss whatsoever.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">My RCN cable company cannot find anything wrong with my cable modem.<SPAN class="Apple-converted-space"> </SPAN>No packet loss.<SPAN class="Apple-converted-space"> </SPAN>I'm supposed to be paying for 10M bit downloads, but only getting 3M bit.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I've been on the shorewall firewall and confirmed that I have the firewall configured properly for VOIP QOS.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I'm using the basic asterisk iax.conf setup with only those changes required to interface with the teliax service.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I have the same issues with both the Sipura Adapter and the Grandstream phones, however, I do believe the Grandstream appears worse at times.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I've attempted to analyze the IAX traffic using the Wireshark ethernet protocol analyzer.<SPAN class="Apple-converted-space"> </SPAN>Everything looks okay best I can tell.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">What else can I do to analyze why the voice quality is so bad?</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">What can I do in Asterisk to help track down where the problem is?</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I want to make this VOIP work.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Thanks for any help.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Jim</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">--Bandwidth and Colocation provided by Easynews.com --</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">asterisk-users mailing list</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">To UNSUBSCRIBE or update options visit:</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><SPAN class="Apple-converted-space"> </SPAN><A href="http://lists.digium.com/mailman/listinfo/asterisk-users">http://lists.digium.com/mailman/listinfo/asterisk-users</A></DIV> </BLOCKQUOTE></DIV><BR></DIV></BODY></HTML>