[Asterisk-Users] Sangoma A200D analog card with fxo's

[Rich Adamson]

The limited testing I've done so far suggests the card "is" production
quality in all sense of the words. I've not found any exceptions as yet.
(And that's based on 21 years of experience working for a large telephone
company as an engineer.)

I will be getting a TDM2400 to eval as well, but it will likely take a
week or two before I can get it implemented/tested.

I'm going to be very interested in testing fax through these cards as 
there does not seem to be any reasonable pstn analog interface solutions 
for small asterisk installations (small defined as less then a PRI).

Rich

------------------------
> Thanks for the info Rich,
> 
> I have been eagerly awaiting feedback on this new card as I have yet to find
> anything I would consider production quality.  It sounds like this new card
> may have finally done that.  
> 
> I am also curious about the new Digium TDM2400 with echo cancel.  It does
> not look like as good of a design mechanically, it apparently does not have
> as good an echo canceller (not 100% sure about that) and it's quite a bit
> more expensive so the Sangoma is looking quite good these days. 
> 
> > -----Original Message-----
> > FYI...
> > 
> > Just installed one of the new Sangoma A200D analog pstn cards 
> > with the hardware echo canceller on a trial basis. The card 
> > has four fxo interfaces.
> > 
> > Excellent audio quality, excellent echo cancelling, and 
> > excellent audio levels.
> > 
> > The four pstn lines at this location are rather long analog 
> > loops that have rather long echo trails. I started with a 
> > pair of x100p's a couple of years ago, swapped those out for 
> > one of the first TDM04b cards, had the TDM04b replaced with a 
> > later revision (H), and have always had at least some echo on 
> > pstn calls.
> > 
> > Our pstn lines have a -7.1 measured loss from the CO's 
> > milliwatt generator.
> > I've configured this new card with gains of 7.0 db to 
> > compensate for that loss, and audio level is now extemely good.
> > 
> > Presumably the Sangoma hardware canceller handles much longer 
> > echo tails, and those tails have been completely eliminated.
> > 
> > The card's setup was not exactly clear has the documentation 
> > for this new card is somewhat fragmented across multiple 
> > readme's, etc.
> > 
> > Based on about one hour's worth of use, I'd recommend this 
> > card over everything that I've tested. (Testing has included 
> > several ata type devices plus the x100p and tdm card.)
> > 
> > Will be testing analog fax and many other items over the next 
> > several days/weeks.