[Asterisk-Users] Terrible crackling on analogue line and X100Pcard

[Rich Adamson]

> >The TDM400 card (with appropriate modules) is the replacement for the x100p, and the chipset 
in use on those modules _do_ support many different international standards. The early versions 
of the TDM card had several problems (output of dmesg showed Wildcard TDM400P REV E/F as an 
example),
> >however the current version (Wildcard TDM400P REV H) seems to be far more stable. (I just 
replaced my old card yesterday with a new one provided by digium as an in-warrantee RMA 
replacement.)
> >  
> >
> The card I have reports from software that it is an E/F but it clearly 
> says on the board it is revision H.
> Curious.
> 
> FWIW, I use the clone card for FXO, and have no problems with any 
> crackle. The echo problem resolves itself after a few seconds of 
> "training" but I am using it on a VERY short loop to connect to an 
> electromechanical step by step switch

Its my understanding (but possibly wrong) the E/F version was the
first release of the TDM card which I purchased direct from digium
a few days before it was announced.

The a few weeks/months after the release, they were RMA'ing those
boards to make a modification to them (adding a jumper or something
to it). The card still reported itself as E/F.

Then sometime after that, another release of the card quitely
happened, but I don't have any knowledge of what the changes were.

Somtime after that (and maybe even some other releases of the card),
the Rev H came out (which is what digium is currently shipping), and
it reports itself as Rev H as well (when using cvs head).

This current Rev H has several additional components on the card
and the fxo modules have printing on them showing "x100". I'd have
to guess this particular board probably has some revisions 
involving the Tiger Jet interface. Its the same old Tiger Jet chip,
but the area around the chip is laid out differently suggesting
a redesign of the printed circuit board itself and involves more
components.

That's about the best I can summarize for it.

Now I'm waiting to see if this one goes out to lunch every week
or two.