[asterisk-users] SIP & Echo

[Asterisk]

In Sip.conf I have the following: canreinvite=no 

 

No, all telephones are on the same subnet, handled by the same switch. I cannot verify if anything has been changed since I installed & configured the network, but as far as I know the whole network configuration is pretty straightforward, without any routing madness.

 

Kind Regards,

Alex

 

  _____  

From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of David Gomillion
Sent: Tuesday, May 22, 2007 4:34 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] SIP & Echo

 

Are your phones reinviting? Do you have any strange routing weirdness, or are they all on a single subnet?

On 5/22/07, Asterisk < asterisk at abraxas.si <mailto:asterisk at abraxas.si> > wrote:

I tried with the ping ... all of the phones respond in ca. 0.3ms, so network seems to be OK. More than 90% of CPU on * box is idle even in peak times, so this shouldn't cause echoes either, right? Hmmm, so handset could be an issue, but did anyone ever experience any handset problems with Polycom IP SoundPoint 430 :-) ?

 

I will check the headsets and any possibilities of acoustical echo. Besides that, if we rule out the network, and the CPU on the * box, is there anything else that could be causing echoes on internal SIP calls?

 

  _____  

From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of David Gomillion
Sent: Tuesday, May 22, 2007 3:22 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] SIP & Echo

 

We experience echo too from time to time. It's usually headset-related, but not always. I ran a persistent ping on one of the phones, and we diagnosed a wiring problem with it. Other phones needed a new handset. The problem is that these problems need to be fixed on the phone NOT hearing echo. 

On 5/22/07, Asterisk <asterisk at abraxas.si> wrote:

How could I check if bandwith or/and latency is causing it?

If I do SIP show peers it says OK (13 ms) for all peers. I guess there is a way to gather more detailed info on SIP calls and latency?

* box is connected to the 1Gb switch with 1Gb connection, and clients have 100Gb/s speed. CPU is 90% free in peak time, and there are 34 SIP hardphones connected to the * box. 

Thanks, Alex

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto: asterisk-users-bounces at lists.digium.com <mailto:asterisk-users-bounces at lists.digium.com> ] On Behalf Of Alexandre VERNIOL
Sent: Tuesday, May 22, 2007 2:18 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] SIP & Echo 

Hi,

Could be bandwith or/and latency ... Many causes...


Alex

Asterisk a écrit :
> Hello all,
>
> One of our clients reported that they are experiencing echo in SIP calls
> (even on internal ones). What do you think could be causing echo in
> internal SIP calls?
>
> We're using Polycom telephones, do you think they could be causing it?
>
> Thanks,
> Alex 
>
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