[Asterisk-Users] Analog FXO Woes Continue

[Doug Reid - Stormcorp]

Hi 

I feel your pain! We have had the same problem with our telco lines
but found that converting to ISDN helped. If the delay on the send
and receive two pair is to big the echo canceller is not strong enough.
Try using a Voictronix card as they seem to solve the problem to a
degree but I would suggest ISDN.

Doug

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com]On Behalf Of Paul Dugas
Sent: Tuesday, December 07, 2004 5:32 PM
To: Asterisk Mailing List
Subject: [Asterisk-Users] Analog FXO Woes Continue


I've been struggling with a test * install for a couple months now in a
small office and am just about ready to give up on it.  It's not that the
system itself is a problem.  I've got everything (attendant, voicemail,
FXS extensions, Cisco and Polycom hard-IP phones, and 2 VOIP carriers)
working except for the frigging analog FXO interfaces.  These things are
driving me completely mad.  Since this is obvioiusly a deal breaker, I'm
looking for any more suggestions on how I might fet these things working.

The hitch is pretty clearly the quality of the lines I have from BellSouth
but I can't get thim to identify anything wrong.  I have tried a Digium
1-port FXO card (can't remember part number and it's no longer on  their
site, hmmm...) as well as a Sipura SPA3000.  With both of these
interfaces, I'm getting consistent mis-dials on outbound calls, broken
inbound fax-detection, broken DTMF detection in the attendant menus. 
Hours of adjustments to the gains on the Digium card only added echo and
failed to reduce the offurenc of the other issues.  These same two
interfaces worked fine on a line at my office so I'm pretty sure the issue
is with the lines at the test site.

So, what are my options here for interfacing with these lines?  Would the
channel-bank route affect this?

Thanks in advance for any suggestions,

Paul

--
Paul A. Dugas                               Dugas Enterprises, LLC
email: paul at dugasenterprises.com            1711 Indian Ridge Drive
phone: 404.932.1355  fax: 770.516-4841      Woodstock, GA 30189 USA
   [ onsite at the Georgia DOT's West Annex, 404.463.2860 x158 ]
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