[asterisk-users] considering purchasing a t1 card, any recommendations?

[R.R. Libera]

Thanks Steve, it was helpful to read your post. Neither Digium or 
Sangoma single span cards have built in E/C, I´m wrong? To get one with 
this feature enable is completely out of my budget; since it is no for 
commercial use. I hope I wont have echo problems or they can be solve by 
means of software parameters.

Thanks a  lot.

R.R. Libera

Steve Davies escribió:
> On 10/20/06, R.R. Libera <astecomm at gmail.com> wrote:
>> Wow, this is a completely neutral and very valuable review. Thanks a lot
>> Zoa.
>>
>> I´m an * newbie; my little box will only needs 20 extensions to give
>> termination to remote users and I´m about to buy a PRI interface; I
>> decide to get Sangoma hardware.. a lot of people recommended it to me.
>>
>> In you review you said: "The biggest choice you need to make is if you
>> want onboard echo cancellation or not". How can I really know if I will
>> need echo cancellation? I´m planning to get a single span card (which
>> doesn´t include echo cancellation) but  how can I know if I really need
>> this feature??
>
> (Hopefully this does not oversimplify)
>
> Fundamentally, since Digium updated the Hardware E/C on their recent
> boards, there is little difference between the PRI-side electronics of
> the Sangoma or the Digium cards (at least, not which would worry the
> end user)
>
> The remaining H/W difference is the PCI interface hardware. Sangoma
> have far more hardware development resource, to their PCI and now
> their PCI-e interfaces are more compatible with variations in
> motherboards.
>
> Digium are a software company, so the software support for their cards
> will be easier to get going as it is "built in" - On the other hand,
> Sangoma's build environment has come a long way, and their support IS
> good.
>
> As far as "do I need echo cancellation" is concerned. I would say that
> if you can afford it, and it is available, then buy it. It generally
> saves a lot of heartache in the longrun, regardless of the
> manufacturer. As you say, the Sangoma single-port cards do not have
> EC, so that decides the issue :)
>
> When using software EC, the MG2 echo canceller in the 1.2.x release is
> good. We have almost no problems on PRI circuits. I am not as
> confident of the 1.4.x version of the EC, but time will tell I
> imagine.
>
> Hope that helps.
> Steve
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