[Asterisk-Users] tdm (and x100p?) echo - fix is coming!

[Wojciech Tryc]

I have similar problem with outbound calls...
Wojtek
----- Original Message ----- 
From: "Brent Franks" <mwless at mindworks.net>
To: <asterisk-users at lists.digium.com>
Sent: Thursday, June 24, 2004 7:16 PM
Subject: RE: [Asterisk-Users] tdm (and x100p?) echo - fix is coming!


> 
> > -----Original Message-----
> > From: asterisk-users-admin at lists.digium.com [mailto:asterisk-users-
> > admin at lists.digium.com] On Behalf Of Rich Adamson
> > Sent: Thursday, June 24, 2004 5:01 PM
> > Be careful with that thought... here's the three lines that were
> > manually changed for testing purposes only (these would have been
> prior to
> > yesterday's change to chan_zap.c):
> > ~1195:  x = 800;
> > ~1636: strcpy(p->echorest, "ww");
> > ~1637: strcpy(p->echorest + 2,
> > 
> > Changing x = 400 to x = 800 fixed the echo problem, but caused
> outbound
> > dialing to totally fail. The pstn line would be seized, but the dtmf
> > sent to the CO was less then acceptable.
> > 
> > Changing lines 1636 (from "w" to "ww") and line 1637 (from "1" to "2")
> > brought the outbound dialing back into a functional state. Since I'm
> > not a programmer, I don't really know what those lines are doing.
> > 
> > Mark then used that info to write the code for implementing
> > echotrainging=800 as a configurable option.
> > 
> > Does today's code support changing all three values? (Since the
> example
> > in the config files suggest two specific choices, I'd bet that using
> > a value of 600 or 1200 or whatever does cause an issue with the
> outbound
> > dialing, etc.)
> 
> My report....
> 
> With our current setup we have an Adtran TotalAccess 750 connected to a
> T100P.  There are 5 incoming FXO lines from Verizon.
> 
> We use about 15 Polycom SIP IP500 phones.
> 
> I updated to today's CVS and still noticed an echo in the middle of
> nearly every call.  The echo would come in after 2 or 3 minutes, last
> for 30 seconds and then disappear. I will report on our user's
> experiences tomorrow.
> 
> Regards,
> 
> - Brent
> 
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