<div dir="ltr"><div>I just tried mod_avmd and mod_vmd and seem to have the same issue, my question is if someone has this working with Panasonic answering machine and Verizon Wireless (as well as other US wireless carriers) voicemail, what change if any should I apply to get it working.</div><div>Thanks for the help<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Aug 20, 2009 at 8:36 PM, Matthew Fong <span dir="ltr"><<a href="mailto:mattdfong@gmail.com" target="_blank">mattdfong@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>I changed</div>
<div> </div>
<div>/*! Minimum time for a beep. */<br>#define MIN_TIME 8000<br></div>
<div>to 6500 and it seemed to work, but I'm not sure how many false positives I will get in a real-world environment. at 4000 it fired the event like 5 times in a session, but 6500 only once. Do you think I should expect a lot of false positives after changing this value?</div>
<div> </div>
<div>--matt</div>
<div><a href="http://www.hellohunter.com/" target="_blank">http://www.hellohunter.com</a><br><br></div><div><div>
<div class="gmail_quote">On Thu, Aug 20, 2009 at 4:54 PM, Eric des Courtis <span dir="ltr"><<a href="mailto:eric.des.courtis@gmail.com" target="_blank">eric.des.courtis@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="BORDER-LEFT:#ccc 1px solid;MARGIN:0px 0px 0px 0.8ex;PADDING-LEFT:1ex">Matt,<br><br>As is mod_vmd will not detect tones shorter then 138ms. However I<br>could get that value down to ~30ms at best by making a few<br>
modifications to the algorithm.<br><br>Cheers.<br><br>Eric des Courtis<br><br><br>On Thu, Aug 20, 2009 at 7:51 PM, Eric des<br>
<div>Courtis<<a href="mailto:eric.des.courtis@gmail.com" target="_blank">eric.des.courtis@gmail.com</a>> wrote:<br></div>
<div>
<div></div>
<div>> Matt,<br>><br>> For your information the tones you gave me are exactly 738Hz. If you<br>> want to try that tone detection thing.<br>><br>> Cheers.<br>><br>> Eric des Courtis<br>><br>
> On Thu, Aug 20, 2009 at 2:20 PM, Michael Collins<<a href="mailto:msc@freeswitch.org" target="_blank">msc@freeswitch.org</a>> wrote:<br>>><br>>><br>>> On Thu, Aug 20, 2009 at 11:06 AM, Steve Underwood <<a href="mailto:steveu@coppice.org" target="_blank">steveu@coppice.org</a>><br>
>> wrote:<br>>>><br>>>> On 08/20/2009 05:22 AM, Michael Collins wrote:<br>>>> ><br>>>> > There is no noise on those 3 beeps. In fact, for something that's<br>>>> > been<br>
>>> > through ulaw/alaw compression those beeps are very clean. They are<br>>>> > quite<br>>>> > short, though.<br>>>> ><br>>>> ><br>>>> > Heck yeah they're short! Steve, in your experience is there a<br>
>>> > practical way to detect a beep that short without chewing up system<br>>>> > resources or having lots of false positives?<br>>>> > -MC<br>>>> ><br>>>> The tone samples I just looked at are about 130ms long. The problem is<br>
>>> the detector is trying to be a very open ended detector of anything<br>>>> narrowband enough to be a single tone, and of any duration beyond some<br>>>> small minimum. Its difficult to make such a thing voice immune unless<br>
>>> you can also count on a very large signal to noise ratio. With a digital<br>>>> trunk you can probably rely on a large SNR, but what happens when people<br>>>> use analogue lines? There is a reason why DTMF detectors try hard to<br>
>>> work down to about 10dB SNR. :-)<br>>>><br>>>> Steve<br>>><br>>> Thanks for the lesson uncle Steve! I'm guessing that the OP will need a new<br>>> strategy. Possibly waiting for silence? Not sure what's the best way to go<br>
>> but I'm interested in hearing if someone has a solution.<br>>><br>>> -MC<br>>><br>>><br>>><br>>> _______________________________________________<br>>> FreeSWITCH-users mailing list<br>
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