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<div>I think you cracked the case! That is exactly how it is behaving. If I immediately send the CNG, I never see the flutter tone. </div><img align="left" width="0" height="0" style="border:0; width:0px; height:0px;" src="https://app.mixmax.com/api/track/v2/yiKgE6Lolrxn5zKa4/i02bj5SZ0V3byd3bsZGQ39mcnpmI" alt="">
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On Wed, Jun 22, 2016 5:24 PM, Jared Geiger <span dir="ltr"> <a href="mailto:jared@compuwizz.net" target="_blank">jared@compuwizz.net</a></span>
wrote:<br>
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<div dir="ltr">I've heard that before when dialing a fax machine when sharing the primary voice line, it would do that kind of behavior to make sure the caller was actually a fax machine. <div><br></div><div>My guess is to save a voice caller's ears from getting the CNG tone whereas a fax machine would detect the line as answered and would start to send the tones causing the receiving fax machine to quit "ringing" and answer.</div><div><br></div><div>~Jared</div></div><div><br><div>On Wed, Jun 22, 2016 at 4:41 PM, David Knell <span dir="ltr"><<a href="mailto:david.knell@telng.com" target="_blank">david.knell@telng.com</a>></span> wrote:<br><blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Best guess - it's fake ringback being generated by some auto fax/voice switch.<div><br></div><div>--Dave</div></div><div><br><div><div><div>On Wed, Jun 22, 2016 at 5:37 PM, Justin Grow <span dir="ltr"><<a href="mailto:jgrow@flowroute.com" target="_blank">jgrow@flowroute.com</a>></span> wrote:<br></div></div><blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>
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<div>This is an interesting one. I'm running into issues with a fax application for a few numbers that are playing back a strange tone I have yet to identify. I originally thought it was FAS with international ringback, but it's occurring on a variety of numbers on various networks. The tone is playing immediately upon answer. Any help identifying what is causing this tone or what it is intended for is appreciated.</div><div><br></div><div>The numbers are all fax lines and do get the proper CED after this tone. I can't find any matching tone in the T.30 ITU-T rec. As best I can figure, it's 400Hz with a 0.03s period on/off cycle, played 1s on 2s off. Listen at the below link. Sorry for the compression; email me and I can send you the original wav recording. </div><div><br></div><div><a href="https://clyp.it/vcq010th" target="_blank">https://clyp.it/vcq010th</a></div><div><br></div><img align="left" width="0" height="0" style="border:0;width:0px;min-height:0px" src="https://compose.mixmax.com/img/blank.png" alt="">
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<br></blockquote></div><span><font color="#888888"><br><br clear="all"><div><br></div>-- <br><div data-smartmail="gmail_signature"><div dir="ltr"><pre cols="72"><font face="courier new, monospace">David Knell, Director, TelNG
T: <a href="tel:%2B44%201223%20797979" value="+441223797979" target="_blank">+44 1223 797979</a> / <a href="tel:%2B1%20970-315-4721" value="+19703154721" target="_blank">+1 970-315-4721</a>
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<br><br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div><table width="480" bgcolor="#ffffff" cellspacing="0" cellpadding="0" style="font-family:Times;border-collapse:collapse"><tbody><tr><td valign="top" align="left" height="16"><div style="margin:0px;padding:0px;line-height:0"><img width="1" height="1" border="0" alt="" src="https://ci5.googleusercontent.com/proxy/ttYdILD4wq9gdXHj_FYxaU3DofQdq91DH_IZTBjSRUZtaEvDhTiGdmGui5sBwFPBh1zjretcjpQa2iNwNL3jLjESQiT-uHwq_wKo8gojXvfyRPxNI4a3nlZBVO7kmA3HLO4tc63E2rP69auKc033xAMHnZooWVVsHOE=s0-d-e1-ft#http://dev.kazzlo.com/flowroute/wp-content/themes/flowroute/core/modules/email-sign/images/empty.png" style="display:block"></div></td></tr><tr><td valign="top" align="left"><table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="0" style="border-collapse:collapse"><tbody><tr><td valign="top" align="left" width="336"><table width="100%" cellspacing="0" cellpadding="0" style="border-collapse:collapse"><tbody><tr><td valign="top" align="left" style="font-family:'Century Gothic',Arial,sans-serif;font-size:18px;color:rgb(55,55,55);font-weight:bold;line-height:14px;text-transform:uppercase">Justin Grow</td></tr><tr><td valign="top" align="left" height="8"><div style="margin:0px;padding:0px;line-height:0"><img width="1" height="1" border="0" alt="" src="https://ci5.googleusercontent.com/proxy/ttYdILD4wq9gdXHj_FYxaU3DofQdq91DH_IZTBjSRUZtaEvDhTiGdmGui5sBwFPBh1zjretcjpQa2iNwNL3jLjESQiT-uHwq_wKo8gojXvfyRPxNI4a3nlZBVO7kmA3HLO4tc63E2rP69auKc033xAMHnZooWVVsHOE=s0-d-e1-ft#http://dev.kazzlo.com/flowroute/wp-content/themes/flowroute/core/modules/email-sign/images/empty.png" style="display:block"></div></td></tr><tr><td valign="top" align="left" style="font-family:'Century Gothic',Arial,sans-serif;font-size:11px;color:rgb(55,55,55);line-height:11px;text-transform:uppercase">Operations</td></tr></tbody></table></td><td width="144" valign="top" align="left"><div style="margin:0px;padding:0px"><a href="http://www.flowroute.com/" style="color:rgb(17,85,204)" target="_blank"><img width="144" height="30" border="0" alt="" src="https://ci5.googleusercontent.com/proxy/ZEPYsAS4taJbWpYkZGtMLNAhMxkwlupfrFYTC_f0XDaKeOsLfc6AReEF7Lqf8uaIqdsCXf99CXjha_BHoo6S5nn43XvoRyZTCtdQud10kB_EfeW2yiH9av6LJKQR1EB_d1ESYx3j8Wr_8Eexf03SVeKrOzi_3VD_xWylgPbS8izQJURW=s0-d-e1-ft#http://dev.kazzlo.com/flowroute/wp-content/themes/flowroute/core/modules/email-sign/images/email-sign-logo.png" style="display:block"></a></div></td></tr></tbody></table></td></tr><tr><td valign="top" align="left" height="12"><div style="margin:0px;padding:0px;line-height:0"><img width="1" height="1" border="0" alt="" src="https://ci5.googleusercontent.com/proxy/ttYdILD4wq9gdXHj_FYxaU3DofQdq91DH_IZTBjSRUZtaEvDhTiGdmGui5sBwFPBh1zjretcjpQa2iNwNL3jLjESQiT-uHwq_wKo8gojXvfyRPxNI4a3nlZBVO7kmA3HLO4tc63E2rP69auKc033xAMHnZooWVVsHOE=s0-d-e1-ft#http://dev.kazzlo.com/flowroute/wp-content/themes/flowroute/core/modules/email-sign/images/empty.png" style="display:block"></div></td></tr><tr><td valign="top" align="left"><table width="100%" cellspacing="0" cellpadding="0" style="border-collapse:collapse;border-top-width:5px;border-top-style:solid;border-top-color:rgb(240,245,245)"><tbody><tr><td valign="top" align="left" height="10"><div style="margin:0px;padding:0px;line-height:0"><img width="1" height="1" border="0" alt="" src="https://ci5.googleusercontent.com/proxy/ttYdILD4wq9gdXHj_FYxaU3DofQdq91DH_IZTBjSRUZtaEvDhTiGdmGui5sBwFPBh1zjretcjpQa2iNwNL3jLjESQiT-uHwq_wKo8gojXvfyRPxNI4a3nlZBVO7kmA3HLO4tc63E2rP69auKc033xAMHnZooWVVsHOE=s0-d-e1-ft#http://dev.kazzlo.com/flowroute/wp-content/themes/flowroute/core/modules/email-sign/images/empty.png" style="display:block"></div></td></tr><tr><td valign="top" align="left" style="font-family:'Century Gothic',Arial,sans-serif;font-size:12px;color:rgb(55,55,55);line-height:14px"><a href="tel:12066418038" value="+12066418000" style="color:rgb(17,85,204)" target="_blank">+1.206.641.8038</a> <br><a href="mailto:jgrow@flowroute.com" value="+12066418000" style="color:rgb(17,85,204)" target="_blank">jgrow@flowroute.com</a> <br></td></tr></tbody></table></td></tr></tbody></table></div><div><br></div></div></div></div></div></div></div></div>
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