Re: [Asterisk-Users] echo paid support

[James Taylor]

Thanks guys,
The echo is there when T1 is connected directly to Asterisk box.
If connected to TNT first then to Asterisk via SIP, then Asterisk echo  
training kicks in (you can hear it 1st second or so) then only a little.

I haven't tried the steps below, but will when I build another box this  
next week.

Thanks,
James
On Fri, 1 Apr 2005 17:09:46 -0700, Damon Estep  
<[EMAIL PROTECTED]> wrote:

Brian,
By the description of James config there is no zaptel in hus box, looks
like the TDM to SIP conversion is happening on the TNT, is it still your
opinion that the steps below will help?
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:asterisk-users-
[EMAIL PROTECTED] On Behalf Of Brian M. Arlinghaus
Sent: Wednesday, March 23, 2005 2:16 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion; James
Taylor
Subject: Re: [Asterisk-Users] echo paid support
James,
After three months of echo, I finally got mine to go away.
I am using a Dell Optiplex GX280 with a P4 3.2GHz processor and 512MB
RAM
and Asterisk version stable 1.07.
Here's what I came up with after reading many of the posts and much
trial
and error.
1. Make sure that ther is no GUI loaded on the asterisk box.
2. Recompile Zaptel with MMX enabled (I think this applies to Intel
Processors only, but someone may correct me if I'm wrong.)
To enable MMX in zaptel, before you compile zaptel, uncomment the line
in
/usr/src/zaptel/zconfig.h file that says:
/* #define CONFIG_ZAPTEL_MMX */
and change it to:
#define CONFIG_ZAPTEL_MMX
3. Recompile Zaptel with the "Aggressive Suppressor" enabled.  I have
never
read anything about this, but saw it while I was enabling the MMX
support.
>From reading zconfig.h, there are different versions of the echo
canceller,
but the comments say that the "aggressive suppressor" works with
"MARK2"
which is what was enabled by default in stable 1.07.
To enable the MARK2 AGGRESSIVE SUPPRESSOR in zaptel, before you
compile
zaptel, uncomment the line in /usr/src/zaptel/zconfig.h file that
says:
/* #define AGGRESSIVE_SUPPRESSOR */
and change it to:
#define AGGRESSIVE_SUPPRESSOR
4. Recompile Zaptel with the instructions "reordered."  I don't know
what
this does, but it was recommended in these posts for fixing echo.
To "reorder" the instructions in zaptel, before you compile zaptel,
add
the
following in /usr/src/zaptel/Makefile underneath the comment in the
Makefile
talking about all the config settings being in zconfig.h.  From the
looks
of
it, it might only effect Pentium 4s???
CFLAGS+=-march=pentium4
5. Make sure the Zaptel card is not sharing an IRQ with othe hardware.
In
my case, this involved moving my T100P to another slot and disabling
all
USB
ports.  (I login remotely to administer the asterisk box since the
GX280
doesn't have a PS/2 keyboard port.)
6. Make sure that you have a sufficient processor and sufficient RAM.
I
didn't make any additions to my configuration, but I did remove one
256MB
RAM chip that seemed to be bad leaving 256MB.
Hope this helps.  Again, most of this is not from me, but others here
with
much more knowledge.
Brian Arlinghaus
----- Original Message -----
From: "James Taylor" <[EMAIL PROTECTED]>
To: <asterisk-users@lists.digium.com>
Sent: Thursday, March 17, 2005 10:40 AM
Subject: [Asterisk-Users] echo paid support
> I've got echo problems.
> *** I'm looking for paid support. ***
> I'll accept free support, but don't mind paying if someone really
knows
> what they are doing.
>
>
> I've read the wiki, etc.
> Played with the settings in zapata.conf
> Using V400P
>
> PSTN->_T1->_ASTERISK->_BROADVOICE->_PSTN    ECHO ON CALLED PHONE
> PSTN->_T1->_ASTERISK->_T1->_PSTN            NO ECHO
> VOIP->_ASTERISK->_T1->_PSTN                 ECHO ON VOIP PHONE G711
>
> I have another trunk group and different T1's that go to a MAX TNT
first:
> PSTN->_T1->_MAX_TNT->_VOIP->_ASTERISK->_VOIP_PHONE      ECHO ON VOIP
PHONE
> g711
>
>
PSTN->_T1->_MAX_TNT->_VOIP_G711->_ASTERISK_IAX_GSM->_ASTERISK_IAX_GSM-
>_VOIP_PHONE_g711
> NO ECHO
> --
> James Taylor
> MetroTel
> 3505 Summerihll Road
> Suite 11
> Texarkana, Texas  75503
> 903-793-1956
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--
James Taylor
MetroTel
3505 Summerihll Road
Suite 11
Texarkana, Texas  75503
903-793-1956
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