A1200 get Stuck

Hello, I got a server AMD 4200+ 2GB RAM, with 2 A800P, and I installed Trixbox CE 2.6 everything is working, but SOMETIMES, I have to restart Asterisk, because some lines get stuck, what's the best method to avoid this.

This is my interrupt output:

[trixbox1.localdomain ~]# cat /proc/interrupts
CPU0 CPU1
0: 6529634 423853922 IO-APIC-edge timer
1: 1 9 IO-APIC-edge i8042
2: 0 0 XT-PIC cascade
5: 280996512 149287972 IO-APIC-level opvxa1200
7: 149253456 281013592 IO-APIC-level opvxa1200
8: 0 1 IO-APIC-edge rtc
11: 48 44487860 IO-APIC-level eth0
15: 200936 4661 IO-APIC-edge ide1
NMI: 0 0
LOC: 430388573 430388610
ERR: 1
MIS: 2

what kind of lines get stock? FXO or FXS? If FXO, try adjust busydetect and busycount