Ok, thanks for reply.
I understand that's it more difficult to work with PCI card than standard SIP product on lan (windows's behaviors) and that you chose professionals products first.
I understand too that the analog way is a wrong way : i should asq my phone operator to transfer my analog line to ISDN line for optimal quality (same phone number - "black number" as they says in France).
Otherwise, someone now Pluscom VPA-11 ? (SPA 3102 clone)