asterisk users - Oct 2007 - Sometimes echoes & Asterisk sometimes connects too early

Hello,

I have read the articles on echo cancellation
(http://www.voip-info.org/wiki/view/Asterisk), but couldn't find a
solution to my problem.

We are running Asterisk 1.4.12 together with an EICON DIVA SERVER BRI-2M
PCI (current driver from EICON) and some SNOM 300/360.
There are few clients where we recognize echoes on both sides when we
call them via ISDN.
With some of these clients we don't even hear their name, when they pick
up the phone, because Asterisk connects the call to early.
I don't know whether these two effects belong together but both are
rather disturbing.

Here is our capi.conf:

[general]
nationalprefix=0
internationalprefix=00
rxgain=1
txgain=0.8
language=de

[ISDN1]
incomingmsn=8304498,8304499
isdnmode=msn
group=1
controller=1
softdtmf=1
context=isdnin
echosquelch=2
echocancel=yes
echotail=64
callgroup=1
devices=2

I have changed the values for rxgain and txgain but that didn't change much.

Thanks for any hint or advice,

Stefan

-- 

********************************************
in-put GbR - Das Linux-Systemhaus
Stefan-Michael Guenther
Geschaeftsfuehrer
Moltkestrasse 49     D-76133 Karlsruhe
Tel./Fax : +49 (0)721 / 83044 - 98/93
http://www.in-put.de
********************************************
     Schulungen  Installationen
         Beratung   Support
      Voice-over-IP-Loesungen
********************************************

I have had ongoing echo problems with snom 360's, maybe the problem lies
with your phones...

 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Stefan
Guenther
Sent: Sunday, October 21, 2007 5:20 AM
To: asterisk-users at lists.digium.com
Subject: [asterisk-users] Sometimes echoes & Asterisk sometimes connects
tooearly

Hello,

I have read the articles on echo cancellation
(http://www.voip-info.org/wiki/view/Asterisk), but couldn't find a
solution to my problem.

We are running Asterisk 1.4.12 together with an EICON DIVA SERVER BRI-2M
PCI (current driver from EICON) and some SNOM 300/360.
There are few clients where we recognize echoes on both sides when we
call them via ISDN.
With some of these clients we don't even hear their name, when they pick
up the phone, because Asterisk connects the call to early.
I don't know whether these two effects belong together but both are
rather disturbing.

Here is our capi.conf:

[general]
nationalprefix=0
internationalprefix=00
rxgain=1
txgain=0.8
language=de

[ISDN1]
incomingmsn=8304498,8304499
isdnmode=msn
group=1
controller=1
softdtmf=1
context=isdnin
echosquelch=2
echocancel=yes
echotail=64
callgroup=1
devices=2

I have changed the values for rxgain and txgain but that didn't change
much.

Thanks for any hint or advice,

Stefan

-- 

********************************************
in-put GbR - Das Linux-Systemhaus
Stefan-Michael Guenther
Geschaeftsfuehrer
Moltkestrasse 49     D-76133 Karlsruhe
Tel./Fax : +49 (0)721 / 83044 - 98/93
http://www.in-put.de
********************************************
     Schulungen  Installationen
         Beratung   Support
      Voice-over-IP-Loesungen
********************************************



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