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<DIV>We, the voiphighway, have about 50 alarms running over voip, it is a
combination of echo cancellation, silent suppression, force g711 and the carrier
you use. The setting can be different for each site, but you should disable echo
cancellation and silent suppression, that is how we usually get it to
function.</DIV>
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<DIV>Otherwise it is a shot in the dark. They are all running thru a
freeswitch setup in what we call a tandem mode, the calls come from either
another freeswitch pbx or pbxnsip hosted server and we relay the calls
onwards. Be sure to use bypass media, the less times the rtp touches
something, the better chance you have of it working.</DIV>
<DIV>Darcy</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=pkubat.lists@kubat.com
href="mailto:pkubat.lists@kubat.com">Kubes</A> </DIV>
<DIV><B>Sent:</B> Wednesday, September 28, 2011 8:58 AM</DIV>
<DIV><B>To:</B> <A title=freeswitch-users@lists.freeswitch.org
href="mailto:freeswitch-users@lists.freeswitch.org">freeswitch-users@lists.freeswitch.org</A>
</DIV>
<DIV><B>Subject:</B> [Freeswitch-users] Alarm System Central Office over
VoIP(FreeSwitch)</DIV></DIV></DIV>
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style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">All,<BR>I
am trying to get an alarm system which calls a central monitoring center to work
via FreeSwitch. I am using a Linksys SPA-1001 and a SIP trunk
(Vitelity). Even though the call is answered the "modems" never
connect, from what I can tell. I see the call being answered in
Freeswtich, but the alarm system reports a "comm error". PCMU is
being used for the call and it does hang-up with "NORMAL_CLEARING".<BR><BR>Does
anyone have any ideas how to get "modems" to work over VoIP? Any
suggestions would be appreciated.<BR><BR>Thanks<BR>Kubes<BR><BR>
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