Well I tried Doug's suggestion and the echo is now better, but when I
call an outside analog line I still get some echo. I can hear my voice
in the ear piece of the phone with a slight delay. Is this just a fact
of life with VoIP, or is there a better way to reduce line echo?
Again, for
Jason Baker wrote:
Well I tried Doug's suggestion and the echo is now better, but when I
call an outside analog line I still get some echo. I can hear my voice
in the ear piece of the phone with a slight delay. Is this just a fact
of life with VoIP, or is there a better way to reduce line
No it's not a fact of life. VoIP works as fine as conventional telephony once
it's correctly set up.
Try echocancel=256 instead of echocancel=yes and also run fxotune (check the
man page). If that all fails, install OSLEC. It's an excellent free software
echo canceller, that works much better
Oops sorry, I didn't read you have a VPMADT032 module. (Damn ADD)
Don't bother setting echocancel=256, echocancel=yes should be working fine.
Also don't bother with OSLEC. Maybe the IP part of the call is introducing the
delay that is being perceived as echo. Do you have QoS set up to minimize
2009/9/4 Vinícius Fontes vinic...@canall.com.br
No it's not a fact of life. VoIP works as fine as conventional telephony
once it's correctly set up.
Try echocancel=256 instead of echocancel=yes and also run fxotune (check
the man page). If that all fails, install OSLEC. It's an excellent
Steve Totaro wrote:
I was also under the impression that rx/tx gain was only for POTS lines.
Our Indianapolis plant had echo on our PRI until I reduced the TX
volume. And, it did work.
Doug
--
Ben Franklin quote:
Those who would give up Essential Liberty to purchase a little Temporary
You should also get your t1 carrier to provide echo cans on the
circuit. Fairly common and easy for them to set up.
John Chastain
On Sep 4, 2009, at 3:07 PM, Steve Totaro
stot...@asteriskhelpdesk.com wrote:
2009/9/4 Vinícius Fontes vinic...@canall.com.br
No it's not a fact of life.
Here is my chan_dahdi.conf
[channels]
; configuration for T1 card as PRI
language = en
group = 1
echocancel = yes
echotraining = yes
echocancelwhenbridged=yes
rxgain=-1.0
txgain=-4.0
signalling = pri_cpe
switchtype = 4ess
usecallerid = yes
context = incoming
channel = 1-23
Here is my
Title: Jason Baker - Signature
I am using the VPMADT032 echo cancellation module
attached to a Digium
TE121B PCI express card. The incoming phone service is a PRI. Can I
still use fxotune if my incoming lines are all digital?
I will try echocancel=256.
I have also tried OSLEC and still get
Title: Jason Baker - Signature
I have not really messed with the QoS on my network, I guess that will
be my next step. I am running 1 - 3Com Unified Gigabit Wired and
Wireless PoE Switch and several 3Com Baseline Switch 2924-PWR Plus
Switches. I know these switches support VoIP. I guess I'll
Title: Jason Baker - Signature
I have not tried it without any echo cancel. I'll have to try that.
Thank you. I'm not sure about rx and tx gain. I adjusted the values and
it seemed to make a difference.
Jason Baker
IT Coordinator
Glastender,
Inc.
5400 North Michigan Road
Saginaw, Michigan
Title: Jason Baker - Signature
Thank you. I will do that.
Jason Baker
IT Coordinator
Glastender,
Inc.
5400 North Michigan Road
Saginaw, Michigan 48604 USA
Phone: 989.752.4275 ext. 228
Fax: 989.752.4276
www.glastender.com
John wrote:
You should also get your t1 carrier to provide echo
Jason Baker wrote:
#---Glastender PRI--
loadzone = us
defaultzone = us
span = 1,0,0,esf,b8zs
This should be 1,1,0
You get your timing from ATT
Doug
--
Ben Franklin quote:
Those who would give up Essential Liberty to purchase a little Temporary
Safety, deserve
Title: Jason Baker - Signature
Thank you. I will edit that.
Jason Baker
IT Coordinator
Glastender,
Inc.
5400 North Michigan Road
Saginaw, Michigan 48604 USA
Phone: 989.752.4275 ext. 228
Fax: 989.752.4276
www.glastender.com
Doug Lytle wrote:
Jason Baker wrote:
Greetings,
I am running Asterisk 1.4.25 with Dahdi Complete
2.2.0, on a Digium TE121B PCI express card with a VPMADT032 echo
cancellation module, connected to an ATT 24 channel PRI.
When I run dahdi show channel X on an active channel, I see this:
Echo Cancellation: 128 taps unless TDM
Jason Baker wrote:
So I know the echo cancellation is working, however when I call a
local analog land line, I get discernible echo.
echocancelwhenbridged=yes
Doug
--
Ben Franklin quote:
Those who would give up Essential Liberty to purchase a little Temporary
Safety, deserve neither
Thank you, I will try that and get back to the mailing list with some
info on whether it was successful or not.
Jason Baker
IT
Coordinator
Glastender, Inc.
5400 North Michigan Road
Saginaw,
Michigan 48604 USA
Phone: 989.752.4275 ext.
228
Fax: 989.752.4276
www.glastender.com
Doug Lytle
Jason Baker wrote:
language = en
group = 1
echocancel = yes
echotraining = yes
signalling = pri_cpe
switchtype = 4ess
usecallerid = yes
context = incoming
channel = 1-23
Just noted that your system is out of Saginaw. The system below is out
of Livonia, with an ATT PRI as well. Note
Interesting. I will give that a try.
Also, any idea between the difference in switchtype between national
and 4ess? All the documentation I read labeled 4ess as ATT, but I
didn't try the national to see if it changed anything, like echo or
signal quality.
Jason Baker
IT
Coordinator
Jason Baker wrote:
Interesting. I will give that a try.
Also, any idea between the difference in switchtype between national
and 4ess? All the documentation I read labeled 4ess as ATT, but I
didn't try the national to see if it changed anything, like echo or
signal quality.
Differences?
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