[Asterisk-Users] Huge Echo

[Mojo with Horan & Company, LLC]

Did you try to get a milliWatt test phone number from your telco?  It 
was really easy for me.  I called the business office and told them that 
"my new digital pbx was having some awful echo trying to deal with their 
lines; all I needed was a milliWatt test line to balance my receive and 
transmit gains properly".  I then had to tell her what a milliWatt test 
line did and why I thought it would help me; she didn't know what it 
was, but she was more than happy to have repair call me to see if they 
could help me.  Less than a half an hour later, somebody called up, 
asked for me, and said "lets see.. milliWatt test line for Sitka... 
747-1100" as easy as that.  I spent a half an hour making calls to this 
number out of my (phew, only three!) zap lines and haven't had echo 
troubles since.

BTW, the area code on that one is 907 if you want to listen to what it 
should sound like.  If the telcos were to route amongst themselves fully 
digitally, wouldn't you be able to use my mW test line no matter where 
you are?  As long as the only analog link between it and you was your 
local copper pair?  Just in case, I wouldn't recommend anybody tuning 
themselves to this mW source.

Mojo



Jared Armstrong wrote:
No that just means you are not calling ztmonitor properly.
Try running ~# ztmonitor 1 -v

Jared Armstrong
OmniSpear, Inc.
Web & Network Solutions

-----Original Message-----
From: Marek Zachara [mailto:marek.zachara at conexe.pl]
Sent: Friday, September 09, 2005 10:43 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Huge Echo

On Friday 09 of September 2005 16:08, Soner Tari wrote:

 >>>> >> Gain setting are important of course. You could use ztmonitor for

that.

 >>> >
 >>> > the asterisk server is a racked machine with no sound card. so can't

use

 >>> > the
 >>> > ztmonitor. If everything fails i'll dig it out and try this
 >
 >>
 >> You don't need a soundcard to use ztmonitor, what do you mean by that?
 >> Marek, you are making me suspicious about whether you've really read

wiki

 >> in detail.
 >>

Well, i did read it. And as per soundcard - have you tried to run
ztmonitor
without it? When i tried i just got:

arnor:~# /usr/src/zaptel-1.2.0-beta1/ztmonitor 1
Unable to open /dev/dsp: No such file or directory
Cannot open audio ...

so i guess it needs a soundcard after all...
Anyway, i installed a soundcard and run the ztmonitor. I went with the
rxgain/txgain down to -6.0 ... the echo is not that loud anymore, but
still
is quite annoying. i'm at loss... no other bright ideas ...

Marek