cat /proc/interrupts 
           CPU0       
  0:   18973809    XT-PIC-XT        timer
  1:          8    XT-PIC-XT        i8042
  2:          0    XT-PIC-XT        cascade
  5:   80456333    XT-PIC-XT        eth1, wcfxo
  6:          2    XT-PIC-XT        floppy
  8:          1    XT-PIC-XT        rtc
 10:    9380317    XT-PIC-XT        eth0
 11:          0    XT-PIC-XT        uhci_hcd:usb1
 12:        103    XT-PIC-XT        i8042
 14:     668712    XT-PIC-XT        ide0
NMI:          0 
LOC:          0 
ERR:          0
MIS:          0



cat /etc/zaptel.conf
fxsks=1
loadzone=us
defaultzone=us



zapata.conf

[channels]
context=default
switchtype=national
signalling=fxs_ks
rxwink=300              ; Atlas seems to use long (250ms) winks
usecallerid=yes
hidecallerid=no
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
canpark=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=yes
rxgain=0.0
txgain=0.0
group=1
callgroup=1
pickupgroup=1
immediate=no
channel => 1