[Asterisk-Users] echo paid support

[Damon Estep]

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: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> bounces at lists.digium.com] 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" <jltaylor at metrotel.net>
> To: <asterisk-users at 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