
NOTE:

there might be timing problems:

use fast machine, pentium or you will not be able to sniff both b-channels
without errors.

i get klicks in the sound while my ide drive is writing data. with my scsi
i don't have any problems. check the dialtone sound if it is clear and
free. otherwhise you loose frames from your isdn board.

the problem is the huge number of interrupts on ide (i don't know about new ide dma controllers). the isdnboards make for each channel one irq each 32 bytes. this makes 4 irq each 32 bytes (2 channels on 2 boards). at a sampling rate of 8000 samples per seconds you get 1000 irqs per second. if you don't response fast enough, you loose frames.

if you cannot get rid of clicks and you don't use ide, disable swap and use ramdisk for logging files and copy afterwards.

to setup a ramdisk, you need to enable ram support in your kernel. then you must make a filesystem with mkfs on /dev/ram0 or something. check options of mkfs for size of volume. the ramdisk will have the size of the highest track written. now mount it and be happy...


