[asterisk-users] Reverse-ATA : Using PSTN lines to connect toAsterisk

[Andrew Joakimsen]

Take a look at these

http://www.telephonydepot.com/product_p/105-056-4104.htm
http://www.telephonydepot.com/ProductDetails.asp?ProductCode=105%2D056%2D4108

I would suggest you avoid the AudioCodes units, AudioCodes blatantly
ignores the GPL and refuses to release even their kernel source.

On 4/10/07, Mike <list at virtutel.ca> wrote:
> Thanks Alex,
>
> That was my original thought, to just buy a TDM400 from Digium and put in as
> many FXO as I wanted, but I liked having the ease of just buying something
> off the shelf, even if it meant paying a little more.
>
> But it looks like I won't have much of a choice.
>
> Mike
>
> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Alex Balashov
> Sent: Tuesday, April 10, 2007 10:25
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [asterisk-users] Reverse-ATA : Using PSTN lines to connect
> toAsterisk
>
>
> Hi Mike,
>
>    You should be looking at ATAs that have FXO, rather than FXS interfaces.
> Most ATAs come with FXS ports so that you can connect analogue phones to
> them, but in this case you're wanting to take PSTN lines from the outside,
> so FXO is desirable.
>
>    Second, you'd have to make sure that the "ATA" supports the sort of
> application you're using it for;  most are manufactured on the opposite
> premise.  I am actually not sure offhand of any ATA firmware that I know
> that I imagine would work this way, although I'm confident it exists as
> consecutive back-to-back analogue<->VoIP adaptations in many scenarios can
> get quite complex and requires that flexibility.
>
>    Basically, you're looking for a small IP PBX that uses SIP internally
> among its private nodes and takes PSTN trunks from the outside.  That's what
> PBXs typically do.  :-)
>
>    If all else fails, you can always roll your own functionality of this
> nature by using FXO cards in Asterisk.  There are various distributions that
> package it in a very lightweight and reusable manner specifically for this
> type of purpose, or you can roll your own if it's scalable enough.
>
> -- Alex
>
>
> --
> Alex Balashov <sasha at presidium.org>
>
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