[Asterisk-Users] Current echo status?

[Alex]

Very interesting that our $11 ebay knock off has no echo issues what so ever
and original X100p produces fair amount of echo echo echo.

Also we have about 200 POTS lines connected to T410E via large channel bank,
were we trying to fight echo for about 10 days now now now.

I'm already thinking to get one of external echo cancellers to kill that
echo produced by analog side side side.

Thank you you you.

P.S. Who said echo echo echo ? :P

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Kyle Hagan
Sent: Thursday, July 15, 2004 7:33 PM
To: asterisk-users at lists.digium.com
Subject: Re: [Asterisk-Users] Current echo status?

Scott Laird wrote:

> I've been following the list for months, and I have a working Asterisk 
> setup, but it'd be *really* useful to me at this point if someone 
> could summarize when Asterisk has echo problems and when it doesn't.  
> For instance, I usually hear a far-end echo when talking on my 7940, 
> but not when using a POTS phone plugged into a TDM400 FXO port.  It 
> doesn't seem to matter if the call goes out over a POTS line or via 
> NuFone; either way there's a fair bit of echo on most (but not all) 
> calls.
>
> Do different SIP phones have better echo cancellation then the Cisco 
> 7940/60s?  How about the Polycom IP500/600s?
>
> Does it matter if calls go out via POTS/T-1/PRI/VoIP?
>
> The general impression that I've received is that "fast" channels 
> (basically traditionally telephony interfaces) don't exhibit 
> noticeable echo, but the slight delay associated with VoIP 
> packetization unmasks existing echo.  Is that a reasonable summary?
>
> We're starting to plan for a new office build-out at work, and I'd 
> love to use Asterisk and SIP phones in the new office, but I'm not 
> going to try to sell management on a phone system with a horrible echo 
> problem, even if it will get fixed eventually.

I have an Asterisk system I have been testing for about a year for work 
and I have NO echo problems.

I just setup an * server at home with a generic $11 ebay X100p clone at 
home and had terrable echo when dialing out POTS. I was able to reduce 
it by changing the TXgain and echocancel set to on. But its still not 
perfect like my REAL DIGIUM card in the office PC. I can live with how 
my home phone is but it would not be good for my office system. Thats 
what I get for trying to go cheap. I would definately recommend Digium 
hardware, or at least a major brand supported by * no clones.

Kyle
www.quadrasoftware.com
Asterisk Receptionist, CallerID and applications.
_______________________________________________
Asterisk-Users mailing list
Asterisk-Users at lists.digium.com
http://lists.digium.com/mailman/listinfo/asterisk-users
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users