In the interest of Symmetry, does anyone else in the world see any need
for a device like the IAXy (or the SIP ones from other manufacturers,
like the ATA186), but one that presents an FXO interface instead, so it
can be connected not to phones, but the PSTN?
There's a hugh market for such a box, and none of the current
manufacturers have addressed the one-to-four pstn line boxes with
anything that would be considered reasonable quality. The GS 488 appears
to be their 'test-the-market' box, but its not very usable based on my
testing. The Mediatrix 1204 does an excellent job with audio, but is
over-priced and under-supported from my perspective.
The spa3k comes the closest to providing a reasonable interface with
acceptable audio, but has several functions that really need to be
fixed. I hope the Linksys folks address those issues instead of dropping
the box.
From my perspective, designing a fxo box that can interface to the many
country standards and has a reasonable echo canceller is not an easy
task. Much more difficult than designing a fxs box. And, if you look at
the cost of the hardware echo canceller chips that can support 128 taps,
the manufacturing cost of a fxo box becomes rather expensive.
If you look at the market from a manufacturer's perspective, the sales
of fxo boxes are significantly less then the sales of fxs boxes.
Therefore it makes sense what the majority of them are doing from an R&D
and manufacturing perspective (eg, address the larger market before
incurring the expense of the smaller market).
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