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

[Eric "ManxPower" Wieling]

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.