[asterisk-users] [Fwd: Internal LAN echo problem]

[kevin bergner]

On 10/24/07, Eric ManxPower Wieling <eric at fnords.org> wrote:
> Jonn Taylor wrote:
> > Eric "ManxPower" Wieling wrote:
> >> Any echo you hear on pure IP calls is caused by the endpoint phone.  You
> >> cannot do ANYTHING about it on Asterisk.
> >>
> >>
> >> Jonn Taylor wrote:
> >>
> >>> Any ideas ?????
> >>>
> >>> Jonn
> >>>
> >>> -------- Original Message --------
> >>> Subject:    [asterisk-users] Internal LAN echo problem
> >>> Date:       Wed, 24 Oct 2007 08:34:32 -0500
> >>> From:       Jonn R Taylor <jonnt at taylortelephone.com>
> >>> Reply-To:   Asterisk Users Mailing List - Non-Commercial Discussion
> >>> <asterisk-users at lists.digium.com>
> >>> To:         Asterisk Users Mailing List - Non-Commercial Discussion
> >>> <asterisk-users at lists.digium.com>
> >>>
> >>>
> >>>
> >>> Hi all,
> >>>
> >>> I have an internal echo problem on my LAN only. I replaced the LAN
> >>> switch with a new linksys 2024 with QOS and seemed to help but not fix
> >>> the problem. Any ideas? Here in my setup - Dell PE6400 Dual 700,
> >>> Asterisk 1.2.24/FreePBX, 2-NIC cards, one with a public ip and one with
> >>> an internal ip, one PAP2, one SPA3102 and 2 BT101. I know that bt's are
> >>> cheap that are known for echo problem in the handset. I have one remote
> >>> user that never has a problem. I have a remote test server at home
> >>> connect via IAX with no problems, also a PAP2 with no problem. External
> >>> faxing from the rest of the world via our voip provider is working
> >>> great. One strange thing that I noticed is that we can not fax to our
> >>> iaxmodem, ATA ---> iaxmodem, but works perfect ATA ---> rx_fax. Not sure
> >>> why either.
>
> > That does not make sense. I can any one of these ata's or phones and
> > connect them to the public ip side and they work fine.
>
> It can make sense or not make sense, but you cannot have echo on a pure
> VoIP call unless the endpoints introduce it.
>
>
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i have seen this when the  headset volume is too high and simply
lowering the volume addressed the problem

as others have said an echo is simply not possible


-- 
kevin