[Asterisk-Users] troubleshooting echo on speakerphone

[Tim Panton]

On 24 Jun 2006, at 02:43, James Harper wrote:

> I've not used it with VoIP, but we have a speakerphone which we have
> used on occasion in a meeting where someone was unable to attend.
>
> When it is turned on, it sends out a 'ping' and measures the echo
> response of the room, and perfectly cancels out all of the echo
> thereafter, unless it is moved. If it is moved then the echo becomes
> horrible.
>
> A cheaper unit might not do echo cancellation quite as well.
>
> James
>
>> -----Original Message-----
>> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
>> bounces at lists.digium.com] On Behalf Of T. Shaw
>> Sent: Saturday, 24 June 2006 03:48
>> To: asterisk-users at lists.digium.com
>> Subject: [Asterisk-Users] troubleshooting echo on speakerphone
>>
>> Hello all,
>> I'm looking to troubleshoot some echo issues and possibly  
>> "studdering"
>> while
>> using the speakerphone with the Intellitouch ITC3002. On the hardware
> end,
>> i
>> have a 2621 setup as the router with some policy maps for qos, and a
>> 2900XL
>> with cos priority set to 5. I have setup created 2 vlans currently
> (really
>> small office), 1 for corp/data, and 2 voice vlan. Asterisk is on the
> 2nd
>> vlan as well as the phones and i have the 2621 doing intervlan
> routing.
>>
>> Currently we have VOIP calls coming in and out, but when calls are
> placed
>> and speakerphone is utilized, the FAR end hears echo of themselves.
> This
>> would happen regardless of who placed the call.
>>
>> Any ideas on where i can start cutting down the echo problem?
>> The phones come with echo-cancellation and is turned on. Thephones
> also
>> have
>> VAD but is currently not on. Would this make a difference while
> utilizing
>> the speakerphone?
>>
>> Terrelle
>>


I know this isn't what you asked about, but we have been using this:
http://www.usr.com/products/voip/voip-product.asp?sku=USR9610
It's a USB device, but it has a decent built in echo can.

I had mine in the kitchen at home with a stone floor and tiled
walls, works a treat!

I had to buy another one as the managing director has mine!

His only complaint is that the speaker is a bit weak, but it has
a headphone output socket, which he plugged into a pair
of JBL speakers, and is _very_ happy with the result.



Tim Panton
tim at mexuar.com