[asterisk-users] Noise on FXS ports (Sangoma)

[shadowym]

Every Sangoma A200 card I have ever connected to the PSTN required a rx gain
of at least 10.  Yours is commented out which I believe would make it
default to 0?  I am guessing that because the rx gain is so low the users
are cranking up the phone volume all the way and maybe your hearing
amplifier background noise??

Your should run ztmonitor and adjust your gains.

-----Original Message-----
From: Stephen Bosch [mailto:posting at vodacomm.ca]
Sent: Tuesday, June 05, 2007 2:02 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Noise on FXS ports (Sangoma)

shadowym wrote:
> I don't see any mention of you adjusting gains on the card/phones.  
> Also, what are you doing for echo cancellation?  Can you post your 
> zapata.conf file?

I had actually tried to adjust the gains, but it actually seemed to make the
problem worse.

I turned echo cancellation off on bridged calls because it did not seem to
be necessary and did weird things to the sidetone

Here is the zapata.conf:

> ;autogenerated by /usr/local/sbin/config-zaptel  do not hand edit 
> ;Zaptel Channels Configurations (zapata.conf) ; ;For detailed zapata 
> options, view /etc/asterisk/zapata.conf.orig
> 
> [trunkgroups]
> 
> [channels]
> context=default
> usecallerid=yes
> hidecallerid=no
> callwaiting=yes
> usecallingpres=yes
> ;callwaitingcallerid=yes
> threewaycalling=yes
> transfer=yes
> canpark=yes
> cancallforward=yes
> callreturn=yes
> echocancel=yes
> ;echocancelwhenbridged=yes
> ;rxgain=2.5
> ;txgain=4.0
> group=1
> callgroup=1
> pickupgroup=1
> 
> immediate=no
> 
> ;Sangoma A200 [slot:8 bus:1 span:1]
> context=private-incoming
> group=0
> signalling = fxs_ks
> channel => 4
> 
> context=office-incoming
> group=1
> signalling = fxs_ks
> channel => 3
> 
> context=office-incoming
> group=1
> signalling = fxs_ks
> channel => 7
> 
> context=fax-incoming
> group=0
> signalling = fxs_ks
> channel => 8
> 
> context=fax-internal
> relaxdtmf=yes
> group=2
> signalling = fxo_ks
> channel => 2
> 
> context=private-internal
> relaxdtmf=yes
> group=2
> signalling = fxo_ks
> channel => 1


-Stephen-