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<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Valer,<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>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thank you for the advice – I have support
tickets open with Adtran and Digium and we are tracking down the issue. Hopefully
it doesn’t come down to adding more hardware, but I’ll keep that in mind.<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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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>-Justin Killen<o:p></o:p></span></font></p>
</div>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Valer Nur<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, January 07, 2013
11:15 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">Asterisk
Users Mailing List - Non-Commercial Discussion</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [asterisk-users] echo
from channel bank</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>It sounds to me like you should first
discuss it with adtran. The standard echo cancellation for Asterisk have a hard
time cancelling echo generated at the far end, especially if the echo
tail/delay is not minimal. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>If adtran can not solve the problem at
their end, you can use a server-side echo cancellation that can handle long
echo tail. One option is PBXMate.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'><o:p> </o:p></span></font></p>
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<div>
<div>
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size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
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<p class=MsoNormal style='background:white'><b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black;
font-weight:bold'>From:</span></font></b><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black'> Justin Killen
<jkillen@allamericanasphalt.com><br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">Asterisk
Users Mailing List - Non-Commercial Discussion</st1:PersonName>
<asterisk-users@lists.digium.com> <br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, January 8, 2013
12:17 AM<br>
<b><span style='font-weight:bold'>Subject:</span></b> [asterisk-users] echo
from channel bank</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal style='background:white'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'><o:p> </o:p></span></font></p>
<div id=yiv818834327>
<div>
<div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>I have
several adtran 624 with 24 FXS ports hooked up to analog phones. The
adtran is connected to asterisk via a channelized T1 into a digium TE820.
I have hardware echo canceling enabled on all channels/spans, but there
is still echo on the lines for both calls out of the trunk, as well as
station-to-station calls. I’ve checked the output of ‘dahdi show channel
x’ and see the echo turned on:</span></font><font color=black><span
style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'> </span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>dozer2*CLI>
dahdi show channel 149</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Channel:
149</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Description:</span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>File
Descriptor: 158</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Span: 7</span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Extension:
98300326</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Dialing:
no</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Context:
from-zaptel</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Caller
ID:</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Calling
TON: 0</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Caller
ID subaddress:</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Caller
ID name:</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Mailbox:
none</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Destroy:
0</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>InAlarm:
0</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Signalling
Type: FXS Kewlstart</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Radio:
0</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Owner:
DAHDI/149-1</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Real:
DAHDI/149-1</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Callwait:
<None></span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Threeway:
<None></span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Confno:
-1</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Propagated
Conference: -1</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Real in
conference: 0</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>DSP:
yes</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Busy
Detection: no</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>TDD: no</span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Relax
DTMF: no</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Dialing/CallwaitCAS:
0/0</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Default
law: ulaw</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Fax
Handled: no</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Pulse
phone: no</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Gains
(RX/TX): 0.00/0.00</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><st1:place w:st="on"><st1:PlaceName
w:st="on"><font size=2 color=black face=Arial><span style='font-size:10.0pt;
font-family:Arial;color:black'>Dynamic</span></font></st1:PlaceName><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'> <st1:PlaceType w:st="on">Range</st1:PlaceType></span></font></st1:place><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'> Compression (RX/TX): 0.00/0.00</span></font><font color=black><span
style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>DND: no</span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Echo
Cancellation:</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>
128 taps</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>
currently ON</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Wait
for dialtone: 0ms</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Actual
Confinfo: Num/0, Mode/0x0000</span></font><font color=black><span
style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Actual
Confmute: No</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Hookstate
(FXS only): Onhook</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'> </span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'> </span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>I have
echocanceller set to HWEC in dahdi/system.conf for all spans, and I have
echocancel=yes in chan_dahdi.cfg</span></font><font color=black><span
style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'> </span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>I’ve
tried reading some echo cancelation articles, but they seem to be focused on
trunks and not on stations. Also, I’m not 100% sure if this is an issue
that I should focus on with asterisk, or if it’s something I should first take
up with adtran?</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'> </span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
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<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>I’m
using dahdi 2.6.1, asterisk 10.10.0. </span></font><font color=black><span
style='color:black'><o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'> </span></font><font
color=black><span style='color:black'><o:p></o:p></span></font></p>
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<p class=MsoNormal style='background:white'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Thanks
in advance,</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p>
</div>
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<p class=MsoNormal style='background:white'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'>-Justin<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-bottom:12.0pt;background:white'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:black'><br>
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