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

[Jorge Mendoza]

Gaëtan,

They are using as gateway to the pstn. In fact, they are remote gateways
for a centralized callcenter:

[pstn] «--» [BRI] «--» [internet] «--» [callcenter]

Regards

Jorge Mendoza

Gaëtan Minet wrote:
> 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
>>>>
>>>>
>>>>