[Asterisk-Users] Polycom 501 horrible echo

[Jeff Herring]

At 10:38 PM 1/23/2006, gw at adcomcorp.com wrote:
>I have had the same issue.  It has a lot to do with the acoustics, as
>well as gain.  Before I messed with the config files it sounded great,
>then I fussed with them and upgraded to the latest sip, and now I also
>notice this on speaker.
>
>I would go totally default, local configure and see how they sound...

All defaults according to Admin Man...

>Greg
>
>-----Original Message-----
>From: asterisk-users-bounces at lists.digium.com
>[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Douglas
>Garstang
>Sent: Monday, January 23, 2006 9:02 PM
>To: Asterisk Users Mailing List - Non-Commercial Discussion;
>asterisk-users at lists.digium.com
>Subject: RE: [Asterisk-Users] Polycom 501 horrible echo
>
>You aren't making calls from one phone to another, with them right next
>to each other on the same desk are you?
>
>Doug.
>
>         -----Original Message-----
>         From: Jeff Herring [mailto:jeffh at sldsi.com]
>         Sent: Mon 1/23/2006 6:46 PM
>         To: asterisk-users at lists.digium.com
>         Cc:
>         Subject: [Asterisk-Users] Polycom 501 horrible echo
>
>
>
>         I have the following situation:
>
>         Asterisk 1.2.1
>         25+ Polycom 501 telephones. Bootrom 2.6.2.0032 Application
>1.6.2.0041
>         Some 501's local to my network, some across the great INTERNET
>divide.
>         PRI connected to Sangoma card.
>
>         Issue: horrible echo (and squeals, and "underwater-like" sound)
>on speaker
>         phone when calling from extension to extension.
>
>         echo not present when calling outbound using PRI or when
>receiving calls
>         from PRI.
>         echo not present when using handset or headset in any case.
>
>         All gains, etc. are as listed in the Polycom Admin Guide.
>
>         Not specific to any phone, or its location on our network.
>
>         I suspect the issue is related to the echo cancelation HW in the
>speaker
>         phone, but
>         I'm not sure...The unfortunate thing is these phones were
>purchased because
>         of their
>         excellent speaker phones which now appear to be worse than the
>Grandstreams!
>
>         Anyone with thoughts of where to start?
>
>         TIA - Jeff H.
>
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--------------------------------------
Jeff Herring  /  jeffh at sldsi.com
Seacoast Laboratory Data Systems, Inc.
Voice:  603 431 4114  x14
FAX:    603 431 2112
--------------------------------------

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