[Asterisk-Users] static noise with TDM revision G but not with revision F

[Equipe du Royaume]

Hi

We have asterisk installed on a system and we had static noise

We changed the TDM card from a revision G to a revision F and the static 
noise is gone

Any idea what is the difference between the two revisions that could make 
this problem ?

Is there a way to downgrade the cards that we have bought

Patrick