Asterisk Digium PCI card Troubleshooting

– IRQ sharing issues. Assign separate IRQs to each digium card.

– IDE drives have DMA mode set to on and that IDE drives are preferred
instead of SATA / SCSI, specifically because IDE drives can be set to
use UDMA2.

– IRQ misses are bad and should be minimised for the digium cards. This
can be checked using zttest application. Minimum acceptable value is
99.98%

– Avoid running X-windows on the box and disable frame-buffer by using
vga=normal on boot.

– If you still see irq misses, try using acpi=off and/or noapic

– Try disabling hyperthreading if it is enabled

See also

• Digium
• Asterisk hardware
• Digium Analog Telephony Cards