[Asterisk-Users] X100P Echo Problems..What's going to happen?

[Mark Spencer]

Echo has nothing to do with TCP vs. UDP.  It's an analog phenomenon that
occurs where the "hybrid" is, where the four-wire circuit changes to a
two-wire circuit.

Anyway I have developed a way to accellerate the adaption of the echo
canceller but it's not made its way into zaptel yet.  I'm in Germany right
now so it probably won't get done until I get back (i.e. sometime next
week), but it *will* get done soon.

Mark

On Mon, 13 Oct 2003, John M wrote:

> What I don't understand is why MSN messenger is perfect with no echo?  I
> switch back and forth and still hear a big difference.  I believe MSN is
> using TCP rather than UDP.  Can * run on TCP rather than UDP?  I think
> this makes senses and can eliminate that echo.
>
> -----Original Message-----
> From: Uriel Carrasquilla [mailto:uriel at adelphia.net]
> Sent: Monday, October 13, 2003 10:02 PM
> To: asterisk-users at lists.digium.com
> Subject: RE: [Asterisk-Users] X100P Echo Problems..What's going to
> happen?
>
> John:
> I have been around voice over data packets for quite a few years and I
> am still to see the perfect system that works identical to circuit
> switching 100% of the time.  My opinion is that there is a lot more to
> the story than just parameters.  Packet loses, double compressions,
> faulty routers, bandwidth, analog to digital and so on can get in the
> way.
> On the other hand, if your customer understand the benefits, and I mean
> more than cost, and can leave with 80% perfect, then you will be able to
> understand why a lot of companies have opted for VoIP (or ATM or Frame
> Relay).
> Regards,
> Uriel
>  -----Original Message-----
> From: asterisk-users-admin at lists.digium.com
> [mailto:asterisk-users-admin at lists.digium.com]On Behalf Of John M
> Sent: Monday, October 13, 2003 1:41 AM
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] X100P Echo Problems..What's going to happen?
> Importance: High
> I've read and experienced the echo problems with the X100P.  Is Digium
> going to fix the problem or refund our money?  I want to see this work
> because myself and other small companies out there use analog lines.  I
> would trade up to T1 but that requires me to have at least 9 lines.  If
> I did trade up, do the T1 cards work perfectly with no echo at all?  I
> get echo with my directly connected computer using Xten SIP.  No matter
> with all the suggestions to change the parameters, it still has echo.
>
> Does anyone have the T1 and have no problems at all?  I would surely
> appreciate you experiences.  What's my option to get this too work
> flawlessly?
>
> John
>
>