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This has nothing to do with the RTCM. The DTMF receiver is the same one that is used in all the other<br>channel drivers for the other types of interfaces also.<br><br>When the app_rpt stuff was first being developed (10+ years ago), the default parameters<br>for the DTMF receiver seemed too "tight" for radio use. There were a number of combinations<br>that were found of receivers and transmitting devices (HT's mobiles, etc) that did not seem to<br>work reliably with the parameters the way they were, so we developed the "RADIO_RELAX" set<br>of parameters, which are more "relaxed" then the normal ones.<br><br>As time has gone on, there have been cases where using these "relaxed" parameters have seemed<br>to do more harm then good. I dont know if your case is one of those. If you wish to try, I suggest<br>re-compiling Asterisk with the RADIO_RELAX compile parameter turned off, and see if you like it<br>that way better. I can guarantee you that you will have less "falsing" if you do that. What I can not<br>guarantee is that you will get all the "real" digits decoded reliably (if you do that).<br><br>Jim WB6NIL<br><br><div><div id="SkyDrivePlaceholder"></div><hr id="stopSpelling">From: adamson_alan@hotmail.com<br>To: app_rpt-users@ohnosec.org<br>Date: Sun, 3 Jun 2012 15:26:06 -0400<br>Subject: [App_rpt-users] RTCM falsing DTMF<br><br>
<title>RTCM falsing DTMF</title>
<p dir="LTR"><span lang="en-us"><font face="Calibri">ok, so is it normal for the RTCM to get false DTMF when voice is doing over the link? I adjusted the RX audio so that the 2</font></span><span lang="en-us"> <font face="Calibri">lights</font></span><span lang="en-us"><font face="Calibri"> were off with a 3khz tone generated from a service monitor.</font></span></p>
<p dir="LTR"><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">I see oh between 6-8 DTMF's detected over the voter channel during use…. How do you fix that issue?</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Alan</font></span><span lang="en-us"></span></p>
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