Sound Compression Software Required

Hi All

Currently I m using asterisk version 1.9 on fedora core 4

Is there any software by which i can run asterisk without FXO card for sound compression

you can run asterisk without the fxo I beleive on the newer verion the ztdummy timer is not required I think it changed at 1.2 for older versions you need a timer source for certain apps see link

you can install the zaptel package w/out using a digium card or any other telephony card. It will use the ‘ztdummy’ driver which will let you do any of the things taht would need an fxo card, but without the card.