[asterisk-users] Reccomendations for connecting to 3-4 PSTN lines?

[Ivan Fetch]

Hello - thanks for your reply,

   I think the T1 card and channel bank will be a bit to expensive for
this time around (5 phones and 3 PSTNs); do you have specific
gateway devices you have used and are happy with?

Thanks - Ivan.


On Wed, 1 Jun 2005, C F wrote:

> In my experience if you can get an external device to do the PSTN <>
> SIP for you, like an ATA, then it works much better than the Digium
> TDM400 cards. If you don't mind the extra ~$200 just go for it. The
> other option might be a channel bank (like the ADIT 600) and a Digium
> T1 card. This will let you use up to 24 FXO/FXS per 8 lines to a card
> (they can be mixed FXS and FXO), but again this will have Asterisk do
> the transcoding (if any) from ulaw to 729 or whatever, which is usualy
> much better to do before it reaches Asterisk.
>
> On 6/1/05, Ivan Fetch <voip at ivanfetch.com> wrote:
> > Hello,
> >
> >   I'm looking to connect Asterisk with three (four in the future) PSTN
> > lines, and would like to get some opinions on the TDM400 Digium card, vs.
> > sip gateways like the Mediatrix 1204, vs. other hardware solutions I'm not
> > yet aware of.
> >
> >   I need the ability to prioritize which PSTN lines are used for outgoing
> > calls (I understand this can be done with the Mediatrix --
> > http://lists.digium.com/pipermail/asterisk-users/2004-February/035926.html),
> > and only answer two of the three lines (the third line will be answered by
> > a directly connected FAX machine, but we can use that line for outgoing
> > calls if the first two PSTNs are in use).
> >
> >   Does the higher cost of something like the Mediatrix ($634) bring
> > advantages to the table over the TDM04b ($337)?  Does the TDM card provide
> > functionality which the sip gateways do not (e.g. incoming / outgoing call
> > progress)?
> >
> > I appreciate hearing from folks who have experience with both methods of
> > connectivity,
> >
> > Thanks - Ivan.
> >
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