[asterisk-users] Fwd: Patton smartnode 463x (BRI) 25ms tail echo cancellation

[Gaëtan Minet]

Thanks

Are you using these to connect isdn phones to the voip or to as a  
gateway to the pstn for a voip system ?

Kind regards

Gaetan


On 08/09/2009, at 19:40, Jorge Mendoza wrote:

> We have some installations with smartnode 4554, (same tail echo
> cancellation) without problems so far.
>
> Jorge Mendoza
>
> Gaëtan Minet wrote:
>> Hi
>>
>> Is anybody using these ?
>>
>> Gaetan
>>
>>
>> Begin forwarded message:
>>
>>> *From: *Gaëtan Minet <gminet-ml at mcit.be <mailto:gminet-ml at mcit.be>>
>>> *Date: *Sat 22 Aug 2009 16:29:42 GMT+02:00
>>> *To: *Asterisk Users Mailing List - Non-Commercial Discussion
>>> <asterisk-users at lists.digium.com
>>> <mailto:asterisk-users at lists.digium.com>>
>>> *Subject: **[asterisk-users] Patton smartnode 463x (BRI) 25ms tail
>>> echo cancellation*
>>> *Reply-To: *Asterisk Users Mailing List - Non-Commercial Discussion
>>> <asterisk-users at lists.digium.com
>>> <mailto:asterisk-users at lists.digium.com>>
>>>
>>> Hi all
>>>
>>> We use pci/pci-e BRI cards in our installations. Due to echo  
>>> problems
>>> (that was before Oslec and others), we quickly switched to cards  
>>> with
>>> hardware-based EC.
>>> So we use exclusively Digium B410p cards that provide 64ms tail EC.
>>>
>>> For several reasons we'd like to switch to external BRI gateways  
>>> like
>>> the Patton smartnodes (the price is getting really close to a  
>>> B410p).
>>>
>>> I'm however curious about their HW EC. I see in the datasheets  
>>> that it
>>> only has 25ms tail per channel (pri are 128ms, but not BRI).
>>> Are some of you using these gateway and do your experience (many)
>>> echo problems on calls ?
>>>
>>> Our other alternative is to use sangoma cards that have 128ms HW EC
>>> and seem more stable overall, but it is yet a bit more expensive.
>>>
>>> Thanks for your feedback.
>>>
>>> Regards,
>>> Gaetan
>>>
>>>
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