[asterisk-users] SIP & Echo

[David Gomillion]

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> 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]
> 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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