[VoIP] Digium Analog Interfaces for Sale

[John Novack]

Mark Rudholm wrote:
> They all work nicely although I was never happy with the echo
> performance of the FXO module.  I would have tried Digium's High
> Performance Echo Cancellation (HPEC) software, but it doesn't
> run on 64-bit platforms.  Then again, my loop is over 26,000
> feet, so others might see better performance.
For those who don't know, the TDM400 holds four of the mentioned modules
The TDM400 does have problems with some older motherboards. IF you have 
a MB that has an ISA slot, forget using the TDM400, some early PCI only 
ones that claim PCI 2.2, either don't or the TDM400 doesn't think it is.
If you want to use the FXO into a local switch with a very short loop, 
you won't have much in the way of echo problems. In fact you may need a 
pad to lengthen the loop a bit.
Phil McCarter and Michael Carter have done some work with these 
artificial lines with a degree of success.

John Novack

-- 
Dog is my co-pilot