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yep. groundstart usually brings better connect/disconnect supervision.
unfortunately it's also more rare and therefore typically more
difficult to get working. it's not your typical every day circuit. if
you are fortunate enough to get good people and you also get good
electrical properties (emphasis on ground) then it is "better".<br>
<br>
/wes<br>
<br>
On Wednesday, March 03, 2010 5:00:20 PM, Joel Perez
<a class="moz-txt-link-rfc2396E" href="mailto:tman701@gmail.com"><tman701@gmail.com></a> wrote:<br>
<blockquote
cite="mid:99f641c31003031400n62845a6m11a4ec73b96ad35f@mail.gmail.com"
type="cite">
<div>I just finished setting up an SRST site in PR and tried using
LoopStart with the carrier there. Had nothing but headaches due to the
carrier not sending the correct disconnect signal on the line.</div>
<div>I used the typical timeout timers in the config and that worked
about 70% of the time. But if the call went unanswered and the AA
picked up then the port would stay off-hook for about 5 mins till the
AA would time out even if the calling party hung up. We got TAC
involved and they confirmed what we saw. We ended up having the carrier
switch the lines to GroundStart and have been happy since.</div>
<div> </div>
<div>I guess it depends on carriers and regions.</div>
<div> </div>
<div> </div>
<div>Joel P.<br>
<br>
</div>
<div class="gmail_quote">On Wed, Mar 3, 2010 at 4:48 PM, Mike
Thompson <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:mthompson729@gmail.com">mthompson729@gmail.com</a>></span>
wrote:<br>
<blockquote
style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;"
class="gmail_quote">Loopstart = easier install (90+% of installs if I
had to guess), no earth ground required, low likelihood of of audio hum<br>
<br>
Groundstart = MUCH less common, earth ground required and not always
readily available, almost no hum.<br>
<br>
Sent from my phone, apologies for any typos.
<div>
<div class="h5"><br>
<br>
On Mar 3, 2010, at 4:41 PM, Mike King <<a moz-do-not-send="true"
href="mailto:me@mpking.com" target="_blank">me@mpking.com</a>>
wrote:<br>
<br>
</div>
</div>
<blockquote
style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;"
class="gmail_quote">
<div>
<div class="h5">I'm just confirming what used to apply to my old
PBX still holds true with a VIC2-4FXO in a 2921 router.<br>
<br>
For analog lines from the PSTN:<br>
Loopstart bad<br>
Groundstart good<br>
<br>
The application is I'm bringing up a small SRST site, and we are
replacing they're old key phone system. I have no idea what the
existing lines are, but we have enough time to change the type out.<br>
<br>
<br>
</div>
</div>
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