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<div class=Section1>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>This is a cross-post from the users list, where there was no
response – hopefully somebody here has a deeper understanding…<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Is there a doc somewhere that explains when to use loop
start vs. kewl start in certain situations? I’ve seen in a lot of posts
that most people just say ‘use kewl start’, but nobody really
explains why. It seems that if kewl start should be used 100% of the time then
why is there even an option for loop start? After some research, it seems like
there are 4 main loop start setup options:<o:p></o:p></span></font></p>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='mso-list:l1 level1 lfo1'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>loop start (classic)</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l1 level1 lfo1'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>loop start with battery
reversal</span></font> <font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l1 level1 lfo1'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>loop start with battery drop
(kewl start)</span></font> <font size=2 face=Arial><span style='font-size:
10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l1 level1 lfo1'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>loop start with tone detection</span></font>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
</ol>
<p class=MsoNormal style='margin-left:.25in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Am I correct in assuming that when using kewl start that
both these things happen?<o:p></o:p></span></font></p>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='mso-list:l0 level1 lfo2'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>If the far end disconnects, the
code will look for battery drop</span></font> <font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
<li class=MsoNormal style='mso-list:l0 level1 lfo2'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>If the near end disconnects,
the code will initiate a battery drop</span></font> <font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></li>
</ol>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>My question is, if I’m using a T1 channel bank, do
these values matter on the T1 interface, or only on the channel bank itself. In
other words, do the disconnect supervision signals cross the channel bank and
end up in the T1 signal, or does the T1 signal use a different mechanism to
signal a disconnect?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Specifically, I’m trying to use an Adtran Total Access
850 with FXO cards, and fairly often I will get phantom calls. I believe this
to be a result of a hangup not being detected correctly (I get “Ring/Off-hook
in strange state 6 on channel X” messages).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>On a side note, Is there some kind of ‘learning’
tool that I can run that monitors the line and displays these kinds of events
during the duration of a call? For instance I could run the tool and then it
could guide me through a series of ‘I call you, you call me’
scenarios and then the tool would tell me what settings to use?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><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>
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