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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Don’t; forget the Milliwatt
application in Asterisk<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b>
asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Keith O'Brien<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, April 25, 2005 4:28
PM<br>
<b><span style='font-weight:bold'>To:</span></b> lists@masonc.com;
Asterisk-Users@lists.digium.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Asterisk-Users]
Cisco's description of echo</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>If you are running a Cisco VoIP gateway you can send a
0dBm 1000Khz test tone into or out of a voice port with:</span></font><o:p></o:p></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>"test voice
port <port#> inject-tone network 1000hz"</span></font><o:p></o:p></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>to measure the tone do a:</span></font><o:p></o:p></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>"sh call active voice brief"</span></font><o:p></o:p></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>>>Another common problem that causes echo in
networks is not setting your<br>
>>loss plan correctly. You need to be sure that you
aren't coming in too<br>
>>hot at any of your analog interfaces. In general you should
see a signal<br>
>>between -20dbm and -12dbm when someone is talking on the
line. If it is<br>
>>significantly hotter then you run the chance of having a larger
reflected<br>
>>signal resulting in echo. I typically try padding down
analog levels by<br>
>>3dB at a time to see if echo is reduced. <br>
>How do you measure the amplitude of a pstn line? As an audio engineer in a<br>
>previous life, I would love to be able to send standard level tones down a<br>
>pstn line and measure the amplitude at my end, then adjust the input gain<br>
>accurately. Is there a way to do this?<o:p></o:p></span></font></p>
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